KEK Theory Meeting on Particle Physics Phenomenology (KEKPH2018 winter) and 3rd KIASNCTSKEK workshop on Particle Physics Phenomenology
at KEK ( Seminar Hall, Building 3 )
Description 
The annual Theory Meeting on Particle Physics Phenomenology (KEKPH2018) together with the 3rd KIASNCTSKEK Joint Workshop will be held at KEK between December 4  7, 2018. This meeting covers many topics in Particle Physics and Cosmology, from the Standard Model and models beyond the Standard Model to particle cosmology and astrophysics. We plan to discuss recent developments in modeling Physics Beyond the Standard Model with their phenomenological aspects and also learn about the latest results and status of various ongoing and planned experiments. The meeting includes talks by invited speakers and short talks by participants. All the talks will be given in English. We aim to provide an opportunity, not only for experts but also for master/Ph.D course students, to learn recent developments in particle physics phenomenology and to activate intensive discussions. The participants will also have the opportunity to present their work through poster presentations.
Registration is open now! Deadline: October 31, 2018. A limited amount of support for local expenses (travel within Japan and KEK dormitory expenses) is available. Unfortunately, we cannot cover International travel. Late registration is available with no financial support. The deadline for requesting VISA letter and local support is September 30, 2018.
Invited Speakers (KEKPH): ==Theory==
==Expt==
Invited Speakers (KIASNCTSKEK Joint workshop):
From Japan:
From Korea:
From Taiwan:
Local Organizers:
External Organizers:
Organizers (KIASNCTSKEK Joint workshop): Korea:
Taiwan:
The KEKPH 2018 winter workshop is supported by the KEK theory center research project, "BSM in high energy and high intensity frontier," and MEXT Grantinaid for Scientific Research on Innovative Areas, "Neutrino physics and the origin of the Universe (25105011)," and "Exploration of Particle Physics and Cosmology with Neutrinos (18H05542)." 
Material:  
Contact  Email: KEKPH2018@ml.post.kek.jp 


09:00  09:30
Registration

09:30  10:30
Plenary Session
Convener: Mihoko Nojiri (KEK) 
09:30
Cosmological Signatures of the SM Vacuum Instability
30'
Speaker: Jose Ramon Espinosa (ICREA/IFAE Barcelona and CERN) Material: Slides 
10:00
Birefringent DE/DM and CMB Bmodes
30'
We discuss CMB Bmode polarization induced by dark energy or dark matter birefringence.
Speaker: KinWang Ng (Academia Sinica) Material: Slides

09:30
Cosmological Signatures of the SM Vacuum Instability
30'
 10:30  11:00 Tea Break

11:00  12:00
Plenary Session
Convener: Mihoko Nojiri (KEK) 
11:00
Higgs boson pair production at HLLHC and HL100 Collider
30'
We perform the most uptodate comprehensive signalbackground analysis for Higgspair production in HH >b ̄b gamma gamma channel at the HLLHC and HL100 TeV hadron collider, with the goal of probing the selfcoupling of the Higgs boson.
Speaker: Kingman Cheung (National Tsing Hua University) 
11:30
Primordial nonGaussianities as a particle collider
30'
The energy scale of inflation could be as high as 1014 GeV, hence it is a phenomenon at the highest energy scale we may explore. Primordial nonGaussianities can then be thought of as a 1014 GeV collider (dubbed the cosmological collider), which may be used to probe new particles at the inflationary scale. In this talk I will review recent progress in the cosmological collider program including our own works. In particular I will discuss how to read of the mass and spin of new particles from nonGaussianities.
Speaker: Toshifumi Noumi (Kobe University) Material: Slides

11:00
Higgs boson pair production at HLLHC and HL100 Collider
30'
 12:00  13:30 Lunch

13:30  15:00
Plenary Session
Convener: Kazunori Kohiri (KEK) 
13:30
Infrared frontier of fundamental physics
30'
Speaker: Maxim Pospelov (University of Victoria / Perimeter Institute) 
14:00
The impact of EDGES 21cm data on WIMP dark matter interactions
30'
The recently announced results on the 21cm absorption spectrum by the EDGES experiment can place very stringent limits on dark matter annihilation cross sections. We properly take into account the heating energy released from dark matter annihilation from the radiation epoch to the 21cm observation redshifts in the radiative transfer to compute the evolution of the gas temperature. Our results show that the global 21cm absorption profile is a powerful cosmological probe of the dark matter interactions. For dark matter annihilating into electronpositron pairs, the EDGES results give a more stringent upper limit than the PLANCK result on the annihilation cross section at the lower dark matter mass region.
Speaker: YueLin Tsai (Academia Sinica) Material: Slides 
14:30
LHC Searches for KaluzaKlein Graviton Decaying into SM/DM Particles
30'
We study the phenomenology of a massive graviton G with universal and nonuniversal (topphilic) couplings to the Standard Model (SM) particles. Such a particle can arise as a warped KaluzaKlein graviton from a framework of the RandallSundrum extradimension model. We also consider simplified dark matter models where a dark matter candidate couples to the SM particles via a G mediator. We study constraints on the model parameter space from the current LHC data. Eur. Phys. J. C 77, no. 5, 326 (2017) (arXiv: 1701.07008) JHEP 1810, 046 (2018) (arXiv1807.09643)
Speaker: Kimiko Yamashita (National Tsing Hua University)

13:30
Infrared frontier of fundamental physics
30'
 15:00  15:30 Tea Break

15:30  16:30
Parallel Session 1
Convener: Yutaka Sakamura (KEK) 
15:30
Current status of the singletdoublet dark matter model
15'
Weakly interacting massive particle (WIMP) has been a popular candidate of dark matter (DM) in our universe. However, many WIMP models are now severely constrained from the DM direct detection experiments. The singletdoublet model is one of the models that can evade the strong constraints from the DM direct detection experiments. The model predicts interesting phenomenology due to the CP violation in the dark sector. In this talk, I will discuss the current status of the singletdoublet dark matter model from viewpoints of DM indirect detection experiments, LHC constraints, and the stability of the Higgs potential.
Speaker: Abe Tomohiro (Nagoya University) Material: Slides 
15:45
Modeling evolution of dark matter substructure and annihilation boost
15'
We study evolution of dark matter substructures, especially how they lose the mass and change density profile after they fall in gravitational potential of larger host halos. We develop an analytical prescription that models the subhalo mass evolution and calibrate it to results of Nbody numerical simulations of various scales from very small (Earth size) to large (galaxies to clusters) halos. We then combine the results with halo accretion histories, and calculate the subhalo mass function that is physically motivated down to Earthmass scales. Our results  valid for arbitrary host masses and redshifts  show reasonable agreement with those of numerical simulations at resolved scales. Our analytical model also enables selfconsistent calculations of the boost factor of dark matter annhilation, which we find to increase from tens of percent at the smallest (Earth) and intermediate (dwarfs) masses to a factor of several at galaxy size, and to become as large as a factor of ∼10 for the largest halos (clusters) at small redshifts. Our analytical approach can accommodate substructures in the subhalos (subsubhalos) in a consistent framework, which we find to give up to a factor of a few enhancement to the annihilation boost. Presence of the subhalos enhances the intensity of the isotropic gammaray background by a factor of a few, and as the result, the measurement by Fermi Large Area Telescope excludes the annihilation cross section greater than ∼4×10−26 cm3 s−1 for dark matter masses up to ∼200 GeV.
Speaker: Nagisa Hiroshima (The University of Tokyo & KEK) Material: Slides 
16:00
Extended Dark Matter EFT
15'
We present a new framework in the language of effective field theory (EFT) to describe Dark Matter and combine limits from experimental searches from nuclear ("Direct Detection") to LHC energies. To improve the high energyvalidity of conventional DM EFTs we add a dynamical (pseudo) scalar serving as mediator to the dark sector, represented by a fermion (or scalar), where richer newphysics sectors can be consistently included via higherdimensional operators. The model is formulated in a gaugeinvariant way and allows to confront classical Dark Matter observables with measurements of the Higgs sector. Interestingly the leading effects originate at dimensionfive, allowing to capture them with a rather small set of parameters. We present constraints on the parameter space arising from collider monoX searches, the relic abundace, indirect and direct detection experiments. The "modelindependent" approach allows to apply the results to different UVcomplete models such as 2HDM+a, extended fermion sectors, the NMSSM and composite mediators.
Speaker: Valentin Tenorth (MaxPlanckInstitut für Kernphysik) Material: Slides 
16:15
Solving corecusp problem with Pauli exclusion principle
15'
I will present a dark matter model in which the dark matter particle is a fermion with mass about 200 eV. In this mass range the Fermi pressure can solve the corecusp problem of the dwarf galaxies and the Lymanalpha constraints can be avoided by cooling and scattering in the dark sector.
Speaker: Haipeng An (Tsinghua University)

15:30
Current status of the singletdoublet dark matter model
15'

15:30  16:30
Parallel Session 2
Convener: Daisuke Nomura (KEK) Location: Meeting Room 1, Building 3 
15:30
Vacuum decay rates in the standard model and beyond
15'
The electroweak vacuum is not absolutely stable in the standard model and various models beyond the standard model. This is due to an appearance of another deeper vacuum, into which the electroweak vacuum can decay. We have performed oneloop calculations of the decay rates in various models including the standard model. In this talk, I explain current status of our analysis on models beyond the standard model.
Speaker: Yutaro Shoji (KMI, Nagoya U.) Material: Slides 
15:45
Lower Bound on the Bounce Action
15'
To calculate lifetime of false vacuum, we have to estimate bounce action. We derive a lower bound on the bounce action without solving equation of motion of scalar field explicitly. This technique is useful to analyze models with large number of scalar fields.
Speaker: Ryosuke Sato (DESY) Material: Slides 
16:00
De Sitter swampland conjecture and cosmological applications
15'
Speaker: Hiroki Matsui (Tohoku University) Material: Slides 
16:15
Leptogenesis via active neutrino oscillation
15'
The possibility of generating the baryon asymmetry of the Universe via flavor oscillation in the early Universe is discussed. After the inflation, leptons are born in some states, travel in the medium, and are eventually projected onto flavor eigenstates due to the scattering via the Yukawa interactions. By using the Lagrangian of the Standard Model with the Majorana neutrino mass terms, llHH, we follow the time evolution of the density matrices of the leptons in this very first stage of the Universe and show that the CP violation in the flavor oscillation can explain the baryon asymmetry of the Universe. In the scenario where the reheating is caused by the decay of the inflaton into the Higgs bosons, the baryon asymmetry is generated by the CP phases in the PontecorvoMakiNakagawaSakata matrix and thus can be tested by the low energy neutrino experiments.
Speaker: Wen Yin (KAIST) Material: Slides

15:30
Vacuum decay rates in the standard model and beyond
15'
 16:30  16:45 Break

16:45  17:45
Parallel Session 1
Convener: Yutaka Sakamura (KEK) 
16:45
Vector SIMP dark matter
15'
Strongly Interacting Massive Particles (SIMPs) have recently been proposed as light thermal dark matter relics. Here we consider an explicit realization of the SIMP mechanism in the form of vector SIMPs arising from an SU(2)X hidden gauge theory, where the accidental custodial symmetry protects the stability of the dark matter. We propose several ways of equilibrating the dark and visible sectors in this setup. In particular, we show that a light dark Higgs portal can maintain thermal equilibrium between the two sectors, as can a massive dark vector portal with its generalized ChernSimons couplings to the vector SIMPs, all while remaining consistent with experimental constraints.
Speaker: SooMin Choi (ChungAng University) Material: Slides 
17:00
Gravitational wave generation by BL symmetry breaking
15'
BL gauge symmetry is a promising extension of the standard model and its breaking plays an important role for neutrino masses. We show that the first order phase transition of the BL gauge symmetry breaking could generate a large amplitude of stochastic gravitational waves radiation.
Speaker: Osamu Seto (Hokkaido University) Material: Slides 
17:15
Sneutrino Dark Matter meets EW SUSY inverse seesaw
15'
In this paper we study sneutrino dark matter in a recently proposed supersymmetric electroweakscale inverse seesaw model, in which the majority of the sneutrino dark matter particle is a mixture of the righthanded sneutrino and the singlet field. The scalar field X responsible for the generation of neutrino masses can simultaneously play a crucial role for sneutrino annihilation in the early Universe via the pseudoscalar mediator into neutrinos. We focus here on the dominant annihilation channels and provide all the formulas together with analytic estimates in order to identify the relevant parameters.
Speaker: Hiroyuki Ishida (NCTS) Material: Slides 
17:30
Gravitymediated dark matter
15'
We consider a KaluzaKlein (KK) massive spin2 graviton as the mediator between dark matter (DM) and Standard Model (SM) particles. KK graviton can mediate the annihilations of dark matter into SM particles and it can be searched for at the LHC through monophoton and dijet channels, etc. In some benchmark models for massive gravitons, we discuss the DMnucleon spinindependent elastic scattering and show that the parameter space for the DM relic density is consistent with current direct/indirect detection and collider searches.
Speaker: YooJin Kang (ChungAng University) Material: Slides

16:45
Vector SIMP dark matter
15'

16:45  17:45
Parallel Session 2
Convener: Daisuke Nomura (KEK) Location: Meeting Room 1, Building 3 
16:45
Indirect search for CPviolation in the Higgs sector by the precision test of Higgs couplings
15'
Although the discovered Higgs boson appears to favor the standard model, the structure of the Higgs sector is not clear yet. For instance, we can consider some extension of the Higgs sector while we keep consistency in the collider experiments. In particular, CPviolating Higgs sector is motivated by the baryon number asymmetry of the Universe. In this talk, we discuss how effects of the CPviolation in the Higgs sector can be observed indirectly. We focus on two Higgs doublet model (2HDM) with the CPviolation, and then we analyze indirect effects of the CPviolation on couplings of the discovered Higgs boson and discuss the precision test using the future colliders. As a result, we find that by measuring the Higgs boson couplings very precisely we are able to distinguish the CPviolating 2HDM from the CPconserving one. This talk is based on [M. Aoki, K. Hashino, D. Kaneko, S. Kanemura and M. Kubota, arXiv:1808.08770 [hepph]].
Speaker: Mitsunori Kubota (Osaka University) Material: Slides 
17:00
Revisiting Flavor and CP Violation in Supersymmetric SU(5) with RightHanded Neutrinos
15'
We revisit the minimal supersymmetric SU(5) grand unified theory with three righthanded neutrinos in which universality conditions for softsupersymmetry breaking parameters are imposed at the Planck scale. If the Majorana masses for the neutrinos are around 10^15 GeV, large mixing angles and phases in the neutrino sector lead to flavorviolation and CPviolation in the righthanded down squark and lefthanded slepton sectors. Since the observed Higgs boson mass and the proton decay constraints indicate sfermions have masses larger than a few TeV, flavor and CP constraints are less restrictive. We explore the constraints on models with a universal softsupersymmetry breaking input parameters coming from proton stability, electric dipole moments, μ→ eγ decay, and the Higgs mass observed at the LHC. Regions compatible with all constraints can be found if nonzero Aterms are taken.
Speaker: Takumi Kuwahara (Institute for Basic Science) 
17:15
Nonperturbative effects of loopinduced mixing: Majorana fields and CP violation
15'
In the loopinduced mixing of multiple flavors of fields, there exist nonperturbative effects which produce phenomenolgical effects which have been improperly considered so far especially when the mass differences among flavors are small. In this talk, I will discuss how to correctly handle such effects and their phenomenological implications especially in connection with CP violation. I will explicitly discuss only Majorana fields, but similar effects in cases of scalar and Dirac fields will also be discussed briefly.
Speaker: ChangHun Lee (NCTS) Material: Slides 
17:30
CP violating mode of the stoponium decay into Zh
15'
We show that a novel decay mode Zh of the bound state of stopantistop pair in the ground state may have a significant branching ratio if the CP violating mixing appears in the stop sector, even after we apply the stringent constraint from the measurement of the electric dipole moment (EDM) of the electron. We show that the branching ratio can be as large as 10% in some parameter space that it may be detectable at the LHC.
Speaker: Po Yen Tseng Material: Slides

16:45
Indirect search for CPviolation in the Higgs sector by the precision test of Higgs couplings
15'

09:00  09:30
Registration


09:00  10:30
Plenary Session
Convener: Motoi Endo (KEK) 
09:00
Old and recent puzzles in Flavour Physics
30'
A series of recent results in B physics seem to indicate a coherent pattern of deviations from the Standard Model predictions. I will show how these “anomalies” could naturally be linked to the old, and still open, puzzle of quark and lepton masses, and I will discuss attempts to solve both these problems in terms of physics beyond the Standard Model.
Speaker: Gino Isidori (University of Zurich) Material: Slides 
09:30
Sterile Neutrinos  Whence, Where, and Whither?
30'
We discuss some of the manifold ways in which sterile neutrinos (SM singlet fermions mixing with neutrinos) affect particle physics, astrophysics, and cosmology. In the first part of the talk, we focus on eVscale sterile neutrinos as a possible explanation for various shortbaseline oscillation anomalies. In the second part, we discuss several ways in which sterile neutrinos can affect dark matter physics and early Universe cosmology.
Speaker: Joachim Kopp (CERN) Material: Slides 
10:00
Direct Detection Prospects for the Cosmic Neutrino Background
30'
Speaker: Martin Spinrath (National Tsing Hua University) Material: Slides

09:00
Old and recent puzzles in Flavour Physics
30'
 10:30  11:00 Tea Break

11:00  12:00
Plenary Session
Convener: Pyungwon Ko (Korea Institute for Advanced Study) 
11:00
Limit on the Axion Decay Constant from the Cooling Neutron Star in Cassiopeia A
30'
The observed rapid cooling of the neutron star (NS) located at the center of the supernova remnant Cassiopeia A (Cas A) can be explained in the minimal NS cooling scenario. This consequence may be changed if there exists an extra cooling source, such as axion emission. In this work, we study the Cas A NS cooling in the presence of axion emission, taking account of the temperature evolution in the whole life of the Cas A NS. We obtain a lower limit on the axion decay constant, f_a > (57) x 10^8 GeV, if the star has an envelope with a thin carbon layer. This is as strong as existing limits imposed by other astrophysical observations such as SN1987A.
Speaker: Natsumi Nagata (University of Tokyo) Material: Slides 
11:30
Realistic axion model with "Gauged" PQ mechanism
30'
The PecceiQuinn (PQ) symmetry may be badly broken by the quantum gravity effect. I suggest the general prescription to protect the PQ symmetry by the gauge symmetry. Then, I mention its potential cosmological problem due to extra fermions which are introduced to cancel the self and the gravitational anomalies. Finally, I show the simple model with the BL gauge symmetry, where the PQ symmetry can be sufficiently protected without adding extra fermions.
Speaker: Motoo Suzuki (ICRR) Material: Slides

11:00
Limit on the Axion Decay Constant from the Cooling Neutron Star in Cassiopeia A
30'
 12:00  13:30 Lunch

13:30  15:00
Plenary Session
Convener: Csaba Csaki (Cornell University) 
15:00  15:30
Poster Session & Tea Break

15:00
NonAbelian Schwinger Pair Production in Topologically NonTrivial Background Fields
20'
Schwinger pair production is examined in SU(2) (SL(2,C)) background fields through the worldline instanton method, whose nonAbelian equivalent stems from Wong’s equations. The role of group complexification for pair production in nonAbelian fields is elucidated. The gauge group winding number is compared and contrasted with the worldline instanton winding number, related to number of produced pairs, for special topologically nontrivial background gauge configurations.
Speaker: Patrick Copinger (Tokyo University) 
15:00
Gauge invariant regularization for perturbative chiral gauge theory
30'
We propose a novel gaugeinvariant regularization for the perturbative chiral gauge theory. Our method consists of the two ingredients: use of the domainwall fermion to describe a chiral fermion with PauliVillars regulators and application of the dimensional regularization only to the gauge field. This regularization is implemented in the Lagrangian level, unlike other gaugeinvariant regularizations (eg. the covariant regularizations). We show that the Abelian (fermion number) anomaly is reproduced correctly in this formulation.
Speaker: Yu Hamada (Kyoto University) 
15:00
MeVscale reheating temperature and thermalization of three active neutrinos by radiative and hadronic decays of massive particles
30'
We study a possible minimum value of reheating temperature in terms of BigBang Nucleosynthesis by considering both radiative and hadronic decays of massive particles. In the current study, neutrino oscillation and neutrino selfinteractions are also taken into account. We adopt updated observational bounds on the primordial abundance of light elements. We obtain the lower bound on the reheating temperature of 4 MeV  5 MeV depending on the mass and hadronic branching ratio of the massive particles. Compared with cases with 100% radiative decay, we find that the change due to hadronic decays on the lower bound is of the order of O(10)%, whereas those of neutrino oscillation and neutrino selfinteraction are of the order of O(1)%.
Speaker: Takuya Hasegawa (SOKENDAI (KEK)) 
15:00
Leptoquarks for Bmeson anomalies and dark matter
30'
The LHCb experiment has recently provided several new measurements to test the lepton flavor universality in the Standard Model (SM) and confirmed some of the prevailing anomalies from the Bmeson decays in BaBar and/or Belle experiments. We consider the setup where scalar leptoquarks or extra U(1) gauge bosons have flavordependent couplings to the SM. In this work, we discuss the flavor structure for quarks and leptons and various constraints on the model and propose a natural candidate for dark matter.
Speaker: Tae Gyu Ro (ChungAng University) 
15:00
Symmetry and geometry in generalized Higgs sector
30'
We formulate a generalization of Higgs effective field theory (HEFT) to include arbitrary number of extra neutral and charged Higgs bosons. The relationship between the finiteness of the electroweak oblique corrections and the perturbative unitarity of the scattering amplitudes involving the Higgs bosons and the longitudinal gauge bosons is clarified in this setup: we verify that once the tree level unitarity is ensured, then oblique parameters' oneloop finiteness is automatically guaranteed. We also obtain formulas which relates the coefficients of the S and U parameter divergences with the scattering amplitudes which can be measured in future collider experiments. These relations give us new prospects when we formulate the strategy of modelbuilding.
Speaker: Yoshiki Uchida (Nagoya University) 
15:00
Resonant leptogenesis at TeVscale and neutrinoless double beta decay
30'
We investigate a resonant leptogenesis by quasidegenerate righthanded neutrinos which masses are TeV scale. At TeV scale, the yield of the baryon asymmetry depends on the phases of PMNS matrix thanks to the flavor effect. In this talk, we show how the yield of the baryon asymmetry correlates with the Diractype CP phase and the Majoranatype CP phase. In addition, we discuss the impact on the neutrinoless double beta decay from the observed baryon asymmetry. We present the predicted range of the effective neutrino mass in neutrinoless double beta decay in order to account for the baryon asymmetry.
Speaker: Takahiro Yoshida (Niigata University)

15:00
NonAbelian Schwinger Pair Production in Topologically NonTrivial Background Fields
20'

15:30  16:30
Parallel Session 1
Convener: Masafumi Kurachi (Keio University & KEK) 
15:30
Fermion dark matter model with U(1) gauge symmetry
15'
We investigate models with a gauge symmetry which is spontaneously broken by an additional Higgs field. In this framework, dark matter (DM) is stabilized by the remnant discrete symmetry originated from the gauge symmetry. We classify such a scenario in cases with the local U(1) symmetry and the global U(1) symmetry. In order to discuss how can we distinguish each case, we here focus on a scenario for fermion DM. We search parameter regions considering various constraints such as searches for DM, second Higgs boson, and dark photon or dark radiation. One of the experimental interests, we expect to explain the gammaray excess as the DM indirect detection in the local model. This talk is based on a collaboration with Seungwon Baek, Pyungwon Ko and WanIl Park.
Speaker: Toshinori Matsui (Korea Institute for Advanced Study) 
15:45
Dark matter models with Higgs portal to multicomponent dark sector
15'
We consider multicomponent dark sector, where the heavier dark particles have stronger couplings to the scalar mediators and may be copiously produced at colliders. These heavier particles then decay to the dark matter (DM) plus standard model (SM) particles outside the detectors, thus behaving as DM imposters at colliders. In a such case, there is no longer tight correlation between the DM direct detection and collider searches, thereby widely opening a new window for DM model building and phenomenology. We construct two explicit models, one for fermionic DM and the other for vector DM, and study various DM phenomenolgy including collider signatures.
Speaker: Takaaki Nomura (Korea Institute for Advanced Study) 
16:00
SemiAnalytic Calculation of Gravitational Wave Spectrum Induced from Primordial Curvature Perturbations
15'
Whether or not the primordial gravitational wave (GW) produced during inflation is sufficiently strong to be observable, GWs are necessarily produced from the primordial curvature perturbations in the second order of perturbation. The induced GWs can be enhanced by curvature perturbations enhanced at small scales or by the presence of matterdominated stages of the cosmological history, both of which are motivated in primordial black hole scenarios to explain dark matter or the LIGO/Virgo event rate. We analytically calculate the integral in the expression of the power spectrum of the induced GWs which is a universal part independent of the primordial spectrum. This makes the subsequent numerical integrals significantly easy. In simple cases, we derive fully analytic formulae for the induced GW spectrum.
Speaker: Takahiro Terada (KEK) Material: Slides 
16:15
Gravitational waves induced by scalar perturbations at second order as probes of the primordial power spectrum on small scales
15'
Compared to curvature perturbations on large scales ($>1$Mpc), those on small scales ($<1$Mpc) are not severely constrained. In this talk, we revisit the issue of probing smallscale primordial perturbations using gravitational waves (GWs), based on the fact that, when largeamplitude primordial perturbations on small scales exist, GWs are induced at second order, and these induced GWs can be probed by both existing and planned gravitationalwave detectors. We use updated, more precise formulae for these induced GWs, and include a variety of gravitationalwave detectors, to report existing and expected limits on the smallscale primordial spectrum. We also discuss how an early matterdominated era changes these limits on curvature perturbations.
Speaker: Keisuke Inomata (ICRR, The University of Tokyo) Material: Slides

15:30
Fermion dark matter model with U(1) gauge symmetry
15'

15:30  16:30
Parallel Session 2
Convener: Toru Goto (KEK) Location: Meeting Room 1, Building 3 
15:30
Sbottoms as probes to MSSM with Nonholomorphic Soft Interactions
15'
Presence of nonholomorphic soft SUSY breaking terms is known to be a possibility in the popular setup of the Minimal Supersymmetric Standard Model (MSSM). It has been shown that such a scenario known as NonHolomorphic Supersymmetric Standard Model (NHSSM) could remain ‘natural’ (i.e., not finetuned) even in the presence of a rather heavy higgsinolike LSP. However, it turns out that distinguishing such a scenario from the MSSM is unlikely to be an easy task, in particular at the Large Hadron Collider (LHC). In a first study of such a scenario at colliders (LHC), we explore a possible way that focuses on the sbottom phenomenology. This exploits the usual tan βdependence (enhancement) of the bottom Yukawa coupling but reinforced/altered in the presence of nonvanishing nonholomorphic soft trilinear parameter A' for sbottom sector . For a given set of masses of the sbottom(s) and the light electroweakinos (LSP, lighter chargino etc.) which are known from experiments, the difference between the two scenarios could manifest itself via event rate in the 2bjets + MET final state, which could be characteristically different from its MSSM expectation. Impact on the phenomenology of the stops at the LHC is also touched upon.
Speaker: Samadrita Mukherjee (Indian Association for the Cultivation of Science) Material: Slides 
15:45
SUSY model for muon g2 anomaly and dark matter, and its implications
15'
Since constraints from LHC SUSY searches and direct detection experiments of dark matter become increasingly stringent, it becomes nontrivial task to find a SUSY model which can explain the muon g2 anomaly and the nature of dark matter, simultaneously. In this talk, I will present a relatively simple SUSY model solving these two important issues, satisfying the LHC and other constraints. It is also shown that, although the model is free from flavor changing neutral current processes in the quark sector, lepton flavor violating processes of the muon can be seen at near future experiments when the thermal leptogenesis is responsible for the observed baryon asymmetry.
Speaker: Norimi Yokozaki (Tohoku University) Material: Slides 
16:00
Spontaneous SUSY breaking in natural SO(10) GUT
15'
If from natural SO(10) GUT, in which DT splitting can be realized with natural assumption in which all interactions allowed by the symmetry are introduced with O(1) coefficients, one singlet field is reduced, SUSY is spontaneously broken in metastable vacuum. Although gaugino masses become much smaller than sfermion masses, we discuss a few interesting phenomenological predictions of this scenario.
Speaker: Nobuhiro Maekawa (Nagoya Univ. KMI) Material: Slides 
16:15
Phenomenology in the model with parity symmetry
15'
We construct an extended Standard Model (SM), motivated by the strong CP problem and the dark matter. In our model, the parity symmetry is conserved, introducing the extra gauge symmetry, $ SU(2)_R ¥times U(1)_R$. The charges of $SU(2)_R ¥times U(1)_R$ are assigned to the mirror fields in the same way as in the SM, but the chirality of the extra fermions is opposite to respect the parity symmetry. The mirror quarks are also charged under the $SU(3)_c$ in the SM, so that the strong CP problem is resolved. In this setup, the gauge symmetry in the mirror leads stable particles like proton and electron. In order to avoid the stable colored particle, we introduce some scalars that also become stable because of the gauge symmetry. In this talk, we discuss the dark matter (DM) physics assuming the lightest scalar is DM.
Speaker: Yuji Omura (KMI, Nagoya Univ.) Material: Slides

15:30
Sbottoms as probes to MSSM with Nonholomorphic Soft Interactions
15'
 16:30  16:45 Break

16:45  17:45
Parallel Session 1
Convener: Masafumi Kurachi (Keio University & KEK) 
16:45
Thermal Effects Induced Freezein Dark Matter and the Gravitational Wave
15'
Speaker: YiLei Tang (Korea Institute for Advanced Study) 
17:00
Stochastic Gravitational Waves from Particle Origin
15'
This talk will be based on arXiv:1810.04975, which investigated how inflaton's gravitational decay can contribute to gravitational waves.
Speaker: Yong Tang (University of Tokyo) Material: Slides 
17:15
Loop corrections to dark matter direct detection in a pseudoscalar mediator dark matter model
15'
If dark matter (DM) is a fermion and its interactions with the standard model particles are mediated by pseudoscalar particles, the treelevel amplitude for the DMnucleon elastic scattering is suppressed by the momentum transfer in the nonrelativistic limit. At the loop level, on the other hand, the spinindependent contribution to the cross section appears without such suppression. Thus, the loop corrections are essential to discuss the sensitivities of the direct detection experiments for the model prediction. The oneloop corrections were investigated in the previous works. However, the twoloop diagrams give the leading order contribution to the DMgluon effective operator and have not been correctly evaluated yet. Moreover, some interaction terms which affect the scattering cross section were overlooked. In this talk, we show the cross section obtained by the improved analysis and discuss the region where the cross section becomes large.
Speaker: Motoko Fujiwara (Nagoya University) Material: Slides 
17:30
QCD axion window and lowscale inflation
15'
We show that the upper bound of the classical QCD axion window can be significantly relaxed for lowscale inflation. If the GibbonsHawking temperature during inflation is lower than the QCD scale, the initial QCD axion misalignment angle follows the BunchDavies distribution. The distribution is peaked at the strong CP conserving minimum if there is no other light degree of freedom contributing to the strong CP phase. As a result, the axion overproduction problem is significantly relaxed even for an axion decay constant larger than 1012GeV. We also provide concrete hilltop inflation models where the Hubble parameter during inflation is comparable to or much smaller than the QCD scale, with successful reheating taking place via perturbative decays or dissipation processes.
Speaker: Fuminobu Takahashi (Tohoku University)

16:45
Thermal Effects Induced Freezein Dark Matter and the Gravitational Wave
15'

16:45  17:45
Parallel Session 2
Convener: Toru Goto (KEK) Location: Meeting Room 1, Building 3 
16:45
Neutral Naturalness and its UV realization
15'
We will present a neutral naturalness model with emphasizing the realistic misalignment between the electroweak scale and the new physics scale, and we will discuss its Ultraviolet realization in holographic Higgs setup, which realizes the finiteness of the Higgs potential.
Speaker: LingXiao Xu (Peking University) Material: Slides 
17:00
Composite 2 Higgs doublet model
15'
We discuss composite 2 Higgs doublet models based on the global symmetry breaking SO(6) to SO(4)*SO(2), where 2 Higgs doublets emerge as a pseudo NambuGoldstone bosons. The Higgs potential is generated at oneloop level via the ColemanWeinberg mechanism. We show that the prediction of the Higgs boson mass spectrum and couplings can be different from those in the minimal supersymmetric standard model.
Speaker: Kei Yagyu (Seikei University) 
17:15
Matching renormalisable couplings between generic theories
15'
The precise study of the Higgs boson properties  in particular its mass and couplings  is of the utmost importance for the investigation of BSM models with extended Higgs sectors. As New Physics currently seems to be driven to higher scales by experimental searches, the framework of Effective Field Theory becomes necessary to address the large mass hierarchies that appear in calculations. In this context, there is a growing interest for the precise matching of Higgs couplings and its automation. I will present recent work on the matching of renormalisable couplings  in particular scalar quartic and Yukawa couplings  between generic theories at oneloop order. I will first show how to avoid a potential loss of accuracy in the automated calculation of threshold corrections due to large logaritmic terms in both the low and highenergy parts of the corresponding matching conditions. Then, I will discuss different possible choices of renormalisation schemes that can potentially simplify the matching procedure, focusing in particular on the treatment of mixing between scalars in these schemes. Finally, I show some examples of results, with a comparison of different schemes in a toy model, and expressions for the oneloop matching of the Higgs quartic coupling in Supersymmetric models with Dirac gauginos.
Speaker: Johannes Braathen (Osaka University) Material: Slides 
17:30
Machine learning with augmentation for boosting diHiggs searches
15'
Augmentation of invisible information with respect to many hypothetical models of background and signal processes, can highly improve the performance of the machine learning classifiers for HEP event discrimination. In this regard diHiggs searches in the channels with multiple invisible final states, is one of the most important applications. Focusing on the diHiggs channels with 2 bottom quarks + 0/1/2 leptons/taus + MET from bbWW and bbtautau productions, we introduce various augmentation schemes and ways to build better multiclass classifiers using deep neural networks. We conclude our study with demonstration how much the new deep learning classifiers supervised by physical augmentation, can improve the discovery potential of diHiggs production at the LHC, and discuss on the implications for future collider study.
Speaker: Kayoung Ban (Yonsei University) Material: Slides

16:45
Neutral Naturalness and its UV realization
15'
 18:00  20:00 Banquet ( Lobby, Kenkyuhonkan )

09:00  10:30
Plenary Session


09:00  10:30
Plenary Session
Convener: Jose Ramon Espinosa (ICREA/IFAE Barcelona and CERN) 
09:00
The Inelastic Frontier at DM and Neutrino detectors
30'
There exist well motivated models of particle dark matter which predominantly scatter inelastically off nuclei in direct detection experiments. This inelastic transition causes the DM to upscatter in terrestrial experiments into an excited state heavier than the DM itself. The relative competitiveness of DM search experiments is governed by the upper bound on the recoil energies employed by each experiment, as well as strong sensitivity to the mass of the heaviest element in the detector. Several implications, including sizable recoil energydependent annual modulation, and improvements for future experiments are discussed. I will also discuss how low threshold neutrino detectors can be used to search for the deexcitation of iDM which has up scattered in the Earth.
Speaker: Patrick Fox (Fermilab) Material: Slides 
09:30
Cosmic neutrino searches as decaying dark matter detectors
30'
The dark matter (or some of it) could exist in a form that decays to neutrinos at cosmologically late times. Proposed experiments searching for the cosmic neutrino background, such as PTOLEMY, could be sensitive to this scenario. We discuss the signals allowed at such an experiment given cosmological constraints.
Speaker: David McKeen (TRIUMF) Material: Slides 
10:00
Noncanonical forth generation leptons
30'
Speaker: ChuanRen Chen (National Taiwan Normal University) Material: Slides

09:00
The Inelastic Frontier at DM and Neutrino detectors
30'
 10:30  11:00 Tea Break

11:00  12:00
Plenary Session
Convener: Maxim Pospelov (University of Victoria / Perimeter Institute) 
11:00
Machine Learning in Particle Physics
30'
Speaker: Matthew Schwartz (Harvard University) Material: Slides 
11:30
Inelastic Boosted Dark Matter Searches at Neutrino Detectors
30'
The search for boosted dark matter, which often arises in twocomponent dark matter scenarios, has received rising attention as an alternative dark matter search strategy. I will discuss phenomenology of boosted dark matter at neutrino detectors including Super/Hyper Kamiokande, focusing on the case where such boosted dark matter scatters off target material inelastically to a heavier unstable darksector state which further decays into visible particles in addition to visible target recoil.
Speaker: Doojin Kim (University of Arizona) Material: Slides

11:00
Machine Learning in Particle Physics
30'
 12:00  12:10 Group Photo
 12:10  13:30 Lunch

13:30  15:00
Plenary Session
Convener: Joachim Kopp (CERN) 
13:30
WISP searches by Tokyo tabletop experiments group
30'
Speaker: Toshio Namba (ICEPP, the University of Tokyo) Material: Slides 
14:00
Hot Topics at Belle and Belle II
30'
Speaker: Yoshiyuki Onuki (University of Tokyo) Material: Slides 
14:30
Physics Beyond Colliders  Exploring BSM Physics
30'
Speaker: Joerg Jaeckel (ITP Heidelberg) Material: Slides

13:30
WISP searches by Tokyo tabletop experiments group
30'

15:00  15:30
Poster Session & Tea Break

15:30  16:30
Parallel Session 1
Convener: Takahiro Terada (KEK) 
15:30
Enhanced photon coupling of ALP dark matter adiabatically converted from the QCD axion
15'
We revisit the adiabatic conversion between the QCD axion and axionlike particle (ALP) at level crossing, which can occur in the early universe as a result of the existence of a hypothetical mass mixing. This is similar to the MikheyevSmirnovWolfenstein effect in neutrino oscillations. After refining the conditions for the adiabatic conversion to occur, we focus on a scenario where the ALP produced by the adiabatic conversion of the QCD axion explains the observed dark matter abundance. Interestingly, we find that the ALP decay constant can be much smaller than the ordinary case in which the ALP is produced by the realignment mechanism. As a consequence, the ALPphoton coupling is enhanced by a few orders of magnitude, which is advantageous for the future ALP and axionsearch experiments using the ALPphoton coupling.
Speaker: ShuYu Ho (Tohoku University) Material: Slides 
15:45
The EDGES 21 cm anomaly, and axion dark matter
15'
Recent observations by the EDGES collaboration have energised the worldwide cosmological community by opening a first observational window into the 'cosmic dawn', when the first stars and galaxies emerged. Yet more excitingly, their findings also suggest that the primordial hydrogen gas present at that time may have been much colder than expected, possibly betraying the indirect influence of the mysterious dark matter known to invisibly permeate our Universe. We report on recent research (Phys. Rev. Lett. 121, 111301 (2018)) demonstrating that, by virtue of the ability to mediate cooling processes whilst in the condensed phase, a small amount of axion dark matter can explain these observations within the context of standard models of axions and axionlikeparticles. The EDGES bestfit result favours an axionlikeparticles mass in the (10, 450) meV range, which can be compressed for the QCD axion to (100, 450) meV in the absence of fine tuning. Future experiments and large scale surveys, particularly the International Axion Observatory (IAXO) and EUCLID, should have the capability to directly test this scenario.
Speaker: Nick Houston (ITPCAS) Material: Slides 
16:00
Dark photon dark matter from axion oscillations
15'
We present a new mechanism for producing the correct relic abundance of dark photon dark matter over a wide range of its mass, extending down to 10−20 eV. The dark matter abundance is initially stored in an axion which is misaligned from its minimum. When the axion starts oscillating, it efficiently transfers its energy into dark photons via a tachyonic instability. If the dark photon mass is within a few orders of magnitude of the axion mass, mγ′ /ma = O(10−3 − 1), then dark photons make up the dominant form of dark matter today. We present a numerical lattice simulation for a benchmark model that explicitly realizes our mechanism. This mechanism firms up the motivation for a number of experiments searching for dark photon dark matter.
Speaker: Naoya Kitajima (Nagoya University) 
16:15
Spectral Analysis of Color Charge in TwoProng Jets with Neural Networks
15'
We discuss signatures in the twopoint correlation spectrum S2(R) on the angular scale R for identifying color charge in twoprong jets. In a twoprong jet, the radiation pattern is correlated with the color charge of originating partons and the decay topology of the jet so that we need a strategy considering those effects simultaneously. The spectral analyses with S2(R) and neural network provide us with a visual framework for studying twoprong substructure as well as color superstructure in terms of the angular scale R. Furthermore, we can design neural networks with interpretable subparts in this framework. The interpretable subparts help us understand how the prediction from the neural network came out. We show our results in the context of classification among Higgs, Sgluon, and QCD jets.
Speaker: Sung Hak Lim (KEK) Material: Slides

15:30
Enhanced photon coupling of ALP dark matter adiabatically converted from the QCD axion
15'

15:30  16:30
Parallel Session 2
Convener: Satoshi Mishima (KEK) Location: Meeting Room 1, Building 3 
15:30
Lattice calculation of B to D(*) semileptonic form factor and determination of Vcb
15'
We report our works on calculation of exclusive Bmeson decays to charmed mesons. In lattice simulation, we use the OktayKronfeld action for the bottom and the charmed quark and HISQ action for the light quarks. We report how discretization error in the lattice simulation can be controlled in systematic way.
Speaker: Jaehoon Leem (Korea Institute For Advanced Study) Material: Slides 
15:45
SMEFT topquark effects on \Delta F=2 observables
15'
We investigate model independent topquark corrections to ∆F = 2 processes within the framework of the Standard Model Effective Field Theory. Dimensionsix ∆F = 1 operators contribute to them though renormalization group evolutions and matching conditions. We provide a complete oneloop matching formula from the top quarks for ∆F = 2 transitions. We also demonstrate these corrections on ∆MBs in the leftright symmetric model, which are compared with the conventional calculations.
Speaker: Daiki Ueda (Sokendai) 
16:00
Flavon Stabilization in Models with Discrete Flavor Symmetry
15'
We propose a simple mechanism for stabilizing flavon fields with aligned vacuum structure in models with discrete flavor symmetry. The basic idea is that flavons are stabilized by the balance between the negative soft mass and nonrenormalizable terms in the potential. We explicitly discuss how our mechanism works in A4 flavor model, and show that the field content is significantly simplified. It also works as a natural solution to the cosmological domain wall problem.
Speaker: So Chigusa (University of Tokyo) Material: Slides 
16:15
Test of the $R(D^{(*)})$ anomaly at the LHC
15'
There are discrepancies between the experimental results and the Standard Model predictions, in the lepton flavor universality of the semileptonic $B$ decays: $B ¥to D^{(*)} ¥ell ¥nu$. As the new physics interpretations, new charged vector and charged scalar fields, that dominantly couple to the second and third generations, have been widely discussed. In this work, we study the signals of the new particles at the LHC, and test the interpretations via the direct search for the new resonances. In particular, we see that the $¥tau ¥nu$ resonance search at the LHC has already covered most of the parameter regions favored by the Belle and BaBar experiments. We find that the bound is already stronger than the one from the $B_c$ decay depending on the mass of charged scalar. This talk is based on arXiv:1810.05843.
Speaker: Syuhei Iguro (Nagoya University) Material: Slides

15:30
Lattice calculation of B to D(*) semileptonic form factor and determination of Vcb
15'
 16:30  16:45 Break

16:45  17:45
Parallel Session 2
Convener: Satoshi Mishima (KEK) Location: Meeting Room 1, Building 3 
16:45
Leptoquark interpretations of B anomaly and its implications on top quark physics
15'
Recently, various leptoquark models have been investigated in terms of interpreting the recent B meson anomalies. We study the possible implications of relevant leptoquark scenarios on the top quark observables.
Speaker: Peiwen Wu (Korea Institute For Advanced Study) Material: Slides 
17:00
Tomography by neutrino pair beam
15'
We consider the neutrino tomography. The idea of neutrino tomography is the imaging of the Earth ’s interior structure by using the neutrino. We assume the neutrino pair beam which has recently been proposed as neutrino source. The beam produces a large amount of neutrino and antineutrino pairs from the circulating partially stripped ions and provides the possibility to measure precisely the energy spectrum of neutrino oscillation probability together with a sufficiently large detector. It is shown that the pair beam gives a better sensitivity to probe the Earth’s crust compared with the neutrino sources at present. In addition we present a method to reconstruct a matter density profile by means of the analytic formula of the oscillation probability in which the matter effect is included perturbatively to the second order.
Speaker: Hirashi Okui (Niigata University) Material: Slides 
17:15
Muon decay into an electron and a light boson in a muonic atom
15'
The charged lepton flavor violation (CLFV) is a good probe to search for new physics beyond the standard model. If there is a neutral boson X which is lighter than muon and has CLFV interaction, a muon can decay into an electron and an X, i.e. mu> e+X. The search for this process is expected to constraint the property of X. In this talk, we focus on a search for the rare decay of muon in a muonic atom due to some advantages. We show the general quantitative calculation for the electron spectrum of the mu>e+X in a muonic atom.
Speaker: Yuichi Uesaka (Saitama University) Material: Slides 
17:30
Improved analysis for leptonnucleus CLFV scattering $\ell_{i}N \to \ell_{j}X$ by scalar interaction
15'
We revisit charged lepton flavor violating (CLFV) scattering $\ell_{i}N \to \ell_{j}X$ mediated by scalar interaction. We point out that a new subprocess $\ell_{i}g \to \ell_{j}g$ via the effective interactions of CLFV mediator and gluon gives large contribution. Furthermore, in the light of quark number conservation, we consider quark pairproduction processes $\ell_{i}g \to \ell_{j} Q \bar{Q}$ ($Q$ denotes heavy quarks) instead of $\ell_{i}Q \to \ell_{j}Q$. We discuss model discrimination by analyzing final state distributions.
Speaker: Masato Yamanaka (Kyushu Sangyo University)

16:45
Leptoquark interpretations of B anomaly and its implications on top quark physics
15'

16:45  17:45
Parallel Session 1
Convener: Takahiro Terada (KEK) 
16:45
Direct measurement of the trilinear Higgs selfcoupling in $e^+e^ \to ZH$.
15'
A method to measure "directly" the trilinear Higgs selfcoupling $\lambda$ in a single Higgs production process is proposed. Timereversalodd (Todd) quantities in the process $e^+e^ \to ZH$, $Z \to f\bar{f}$ are computed from the absorptive part of the electroweak oneloop amplitude. They are essentially updown asymmetries of the final fermion $f$ with respect to the $ZH$ production plane. The Todd asymmetries directly measure $\lambda$, because the treelevel diagram for a finalstate interaction between the $ZH$ contributes linearly to them.
Speaker: Junya Nakamura (Universität Tübingen) Material: Slides 
17:00
Timeinformation at colliders
15'
We study the kinematics of longlived particles which decay inside the detector using precision timing information. We consider the event with two longlived particles which decay to visible and invisible particles. We reconstruct 4momentum of longlived particles as well as invisible particles by solving kinematic equations with and without the timing information. Without using the timing information, the kinematic equation is only solved in very special case. But using the timing information we can solve it in general cases. With this method, we can find out more information of longlived particles at the collider.
Speaker: Dong Woo Kang (Yonsei University) Material: Slides 
17:15
Fingerprinting models of firstorder phase transitions by the synergy between collider and gravitationalwave experiments
15'
If a firstorder phase transition occurs in the early Universe, gravitational waves are produced from collisions of bubbles and subsequent plasma dynamics. Since the resulting GW spectrum reflects the underlying particle physics model, we may be able to use the gravitationalwave spectrum to explore the form of the Higgs potential. In this talk, we quantitatively discuss this possibility by adopting the Fisher matrix analysis, which is essentially a Gaussian approximation of the likelihood function, to analyze the expected constraints in future spacebased interferometers for parameters of the extended models and discuss the testability of the model by the synergy between the collider and gravitationalwave experiment. This talk is based on [K. H, R. Jinno, M. Kakizaki, S. Kanemura, T. Takahashi and M. Takimoto, arXiv:1809.04994 [hepph]].
Speaker: Katsuya Hashino (Osaka University / University of Toyama) Material: Slides 
17:30
The LHC potential of Vectorlike quark doublets
15'
I will talk about the recent result of our work “The LHC potential of Vectorlike quark doublets” which is arxiv:1806.01024.
Speaker: Daisuke Harada (KEK)

16:45
Direct measurement of the trilinear Higgs selfcoupling in $e^+e^ \to ZH$.
15'

09:00  10:30
Plenary Session


09:00  10:30
Plenary Session
Convener: Patrick Fox (Fermilab) 
09:00
New directions for composite Higgs models
30'
Speaker: Csaba Csaki (Cornell University) Material: Slides 
09:30
Disorder in Model Building: from the Hierarchy Problem to Colliders
30'
I will talk about two distinct ideas connected by the introduction in particle phenomenology of disordered systems with a large number of degrees of freedom. First I will show how freezein dark matter can solve the hierarchy problem. Then I will discuss how hidden sectors with a large number of new particles can hide at colliders.
Speaker: Raffaele D'Agnolo (SLAC) Material: Slides 
10:00
Group Theoretic Approach to Theory of Fermion Production
30'
Speaker: Minho Son (KAIST) Material: Slides

09:00
New directions for composite Higgs models
30'
 10:30  11:00 Tea Break

11:00  12:00
Plenary Session
Convener: Gino Isidori (University of Zurich) 
11:00
Heterotic Mtheory from the clockwork perspective
30'
A continuum limit of the clockwork mechanism provides a useful picture to understand extra dimensions. The Generalized Linear Dilaton model (GLD) realizes the continuum clockwork with varying clockwork gear masses. A special point of GLD is the linear dilaton model (LD) which has been discussed from the type II little string theory. In this talk, I will discuss a possible UV completion of GLD from different types of string theory. It will be shown that the HoravaWitten theory (or Heterotic Mtheory) provides a direct realization of certain types of GLD with characteristic phenomenological features. Furthermore, I will discuss the possibility that more general Mtheory limit via 11D supergravity can realize LD and RandallSundrum (RS) points.
Speaker: Sang Hui Im (Pusan National University) Material: Slides 
11:30
Determination of alpha_s from static QCD potential with renormalon subtraction
30'
We determine the strong coupling constant alpha_s from the static QCD potential by matching a theoretical calculation with lattice QCD computation. We adopt a new theoretical framework where we subtract the renormalon uncertainties, which limit the accuracy of perturbation theory, based on OPE. This allows us to take a considerably wider fitting range than ordinary perturbation theory, which leads to a more reliable determination. We obtain alpha_s(M_Z) with 1.3 % accuracy, which is consistent with the current PDG value.
Speaker: Hiromasa Takaura (Kyushu University) Material: Slides

11:00
Heterotic Mtheory from the clockwork perspective
30'
 12:00  13:30 Lunch

13:30  15:00
Plenary Session
Convener: Ryuichiro Kitano (KEK) 
13:30
A Dark Horse in Search for NonResonant Double Higgs
30'
We propose a novel method for measuring the triple Higgs coupling at the LHC. We choose the hh > (b b)(l+l MET) process, as a concrete example, which is least investigated due to huge backgrounds. The method relies on two new kinematic functions, Topness and Higgsness, which respectively characterize features of ttbar (major background) and hh events. It leads to a surprisingly high signal significance compared to existing results without employing sophisticated machine learning techniques. Our approach is applicable to different final states such as (b b)(j j l MET) and (bb)(tautau), as well as searches for other BSM particles. Reference: arXiv:1807.11498
Speaker: Jeong Han Kim (The University of Kansas) Material: Slides 
14:00
Charged scalars at the LHC
30'
Speaker: Gang Li (National Taiwan University) Material: Slides 
14:30
Probing Dark Matter at LIGO and Midband
30'
Speaker: Sunghoon Jung (Seoul National University) Material: Slides

13:30
A Dark Horse in Search for NonResonant Double Higgs
30'
 15:00  15:30 Closing Remarks

09:00  10:30
Plenary Session