FPUA 2024

Session

Oral

14 Mar 2024, 09:10

OUX (Kyoiku Kyoso Commons) (Okayama University)

Conveners

Oral: Session 1

• Takahiko Masuda (Okayama University)

Oral: Session 2

• Akira Ishida (The University of Tokyo)

Oral: Session 3

• Kazuhiko Sugiyama (Kyoto University)

Oral: Session 4

• Hirohiko Shimizu (Nagoya University)

Oral: Sesseion 5

• Noboru Sasao (Okayama University)

Oral: Session 6

• Yasuhiro Sakemi (CNS, the university of Tokyo)

Oral: Session 7

• Koichiro Shimomura (KEK IMSS)

Oral: Session 8

• Minoru Tanaka (Osaka University)

4. Advancing EDM searches with ultracold radioactive molecules at FRIB

Xing Wu (Facility for Rare Isotope Beams, Michigan State University)

14/03/2024, 09:10

"Searches for non-zero electric dipole moment (EDM) in fundamental particles shed light on discrete symmetries of nature and constrain new physics beyond the Standard Model. The most sensitive electron EDM and many ongoing nuclear EDM searches are performed with molecules, benefiting from the substantial intra-molecular electric field. At the Facility for Rare Isotope Beams (FRIB), we are...

5. New methods for quantum control of polar molecules for symmetry-violation searches

Chi Zhang (California Institute of Technology)

14/03/2024, 09:40

"Precision measurements of time-reversal symmetry violation in molecular systems provide stringent tests of new physics beyond the Standard Model. I will report our experimental progress towards measuring the nuclear magnetic quadrupole moment using polyatomic 173YbOH molecules. In addition, I will present our recent proposals for advancing the quantum control of molecules and thus improving...

6. Current status of laser and optical system for EDM search using cold francium atoms at RIKEN/CNS

Keisuke Nakamura (CNS, the University of Tokyo)

14/03/2024, 10:10

"A laser and optical system for magneto-optical trapping (MOT) of radioactive francium (Fr) atoms has been developed at RIKEN/CNS. The wavelength meter stabilized the laser frequencies involved in MOT, and the 400 m fiber link overcame the challenge of spatial separation of the laser and Fr atoms. MOT was successfully demonstrated in test experiments using stable rubidium. This achievement is...

8. Three-particles Aharonov-Bohm effect

Yutaka Shikano (University of Tsukuba)

14/03/2024, 11:00

"The setup of the Einstein-Podolsky-Rosen (EPR) paradox leads to provide the observer-depedent description of the quantum state from quantum information perspectives. While this problem is based on the single-particle system, the problem can be extended to the many identical particle system. We provide the experimental proposal to clarify the quantum state description to the identical...

9. Control of equilibrium and non-equilibrium Casimir forces

Hideo IIzuka (KEK / Tyota Central RandD Lab)

14/03/2024, 11:30

"Following a brief overview of Casimir forces, our recent theoretical works on Casimir forces are presented. Feedback control is introduced for manipulating non-equilibrium Casimir forces. In addition, fundamental properties of equilibrium and non-equilibrium Casimir forces are discussed for systems consisting of reciprocal and non-reciprocal materials."

10. Towards quantum gravity: Test of Gravitational Inverse Square Law and Lorentz Invariance

Jiro Murata (Rikkyo University)

14/03/2024, 12:00

"Tabletop experiments searching violation of gravitational inverse square law and the muLV experiment at J-PARC, aiming Lorentz violation using muon decay, will be introduced. Motivations will also be discussed based on opening the window to quantum gravitational theories."

11. Nuclear and particle physics with cold ytterbium and Rydberg atoms

Akio Kawasaki (NMIJ/AIST)

14/03/2024, 14:30

"Precision spectroscopy of atoms has reached as high accuracy as 18 digit precision. This remarkable accuracy has opened avenues for investigating nuclear and particle physics, which were conventionally explored with high energy accelerators. Such high precision measurements are sensitive to subtle effects of high energy phenomena that may manifest in the low energy system. Alternatively,...

12. Production-decay dynamics of Th-229 nuclear clock isomeric state in crystal

Ming Guan (Okayama University)

14/03/2024, 15:00

"Thorium-229 has the lowest nuclear excited level (229mTh), around 8 eV, which provides many applications from practical usage to fundamental research. In 2019, our group succeeded in producing 229mTh states via X-ray pumping and in 2023, we observed the vacuum-ultraviolet (VUV) photons stemmed from the radiative decay of 229mTh. The lifetime of 229mTh is measured, by counting the VUV photons,...

7. Progress of a Neutron Electric Dipole Search by the TUCAN Collaboration

Shinsuke Kawasaki (KEK)

14/03/2024, 15:25

"To explain the asymmetry between matter and antimatter in the universe, a new source of CP violation is necessary. The presence of a non-zero permanent electric dipole moment (EDM) in a fundamental particle, such as a neutron, breaks the time-reversal symmetry and implies CP violation if we assume CPT conservation.

A neutron EDM measurement is performed using ultra-cold neutrons (UCNs),...

13. Light Dark Matter Search with Nitrogen-Vacancy Centers in Diamonds

Kazunori Nakayama (Tohoku University / QUP)

14/03/2024, 16:10

"We propose new ideas to directly search for light dark matter, such as the axion or the dark photon, by using magnetometry with nitrogen-vacancy centers in diamonds. If the dark matter couples to the electron spin, it affects the evolution of the Bloch vectors consisting of the spin triplet states, which may be detected through several magnetometry techniques. We give several concrete...

15. Directional Detection of Cosmic Ray Boosted Dark Matter

Keiko Nagao (Okayama University of Science)

14/03/2024, 16:40

"Dark matter with MeV scale mass is difficult to detect with standard direct search detectors. However, they can be searched for by considering the up-scattering of kinetic energies by cosmic rays. Because the dark matter density is higher in the central region of the Galaxy, the up-scattered dark matter will arrive at Earth from the direction of the Galactic center. Once the dark matter is...

14. Quantum entanglement of ions for light dark matter detection

Asuka Ito (QUP/KEK)

14/03/2024, 17:05

"We explore a detection scheme for light dark matter, such as axion dark matter or dark photon dark matter, using a Paul ion trap system. It turns out that the sensitivities of the Paul ion trap system to axion-photon coupling and gauge kinetic mixing can reach previously unexplored parameter space. Furthermore, we illustrate that an entangled qubit system involving N ions can enhance the...

16. Research and development towards an axion search experiment using quantum sensing of magnons

Yaman Singh Shrestha (The University of Tokyo)

14/03/2024, 17:25

"We plan to search for axion dark matter through their interactions with electron spins. Axion wind from the dark matter halo in our galaxy creates an effective magnetic field that induces quanta of collective electron spin wave excitations called magnons in ferromagnetic crystals like Yttrium Iron Garnet (YIG). We plan to observe these axion-induced magnons using a hybrid magnon - photon -...

3. Study of Gravitational Wave by LIGO : past, present and future

Hiroaki Yamamoto (California Institute of Technology)

15/03/2024, 09:00

"Sincere the prediction of the gravitation wave (GW) by Einstein 100 years go, scientists all over the world have been looking for the GW signal.
The first GW signal was detected by US-based LIGO GW detectors using laser interferometry on September 14, 2015. The source of the signal was a merger of two black holes at 1.3 billion light year away.
Another epoch making observation was done on...

17. Fundamental Physics Using (Anti)hydrogen Atoms: ALPHA at CERN and HAICU at TRIUMF

Makoto Fujiwara (TRIUMF)

15/03/2024, 10:25

"Precision comparisons between antihydrogen and its well-studied counterpart, hydrogen, enable tests of fundamental symmetries and principles, such as CPT invariance and Einstein's Equivalence Principle. Over the past 25 years, experiments at CERN's antiproton facility have achieved significant progress. In this talk, I will discuss recent developments by the ALPHA experiment at CERN....

18. Magnetic field studies using electron plasmas for gravitational experiments with antihydrogen

Adam Powell (University of Calgary)

15/03/2024, 11:05

"The hydrogen atom has been studied extensively throughout history and provides the most precisely measured systems in physics. Antihydrogen has a significantly shorter history of study but no less potential for precision physics measurements. Comparisons between hydrogen and antihydrogen then offer the possibility to test fundamental symmetries such as charge, parity, time (CPT) invariance at...

19. Fundamental physics using exotic atoms at J-PARC

Shinji Okada (Chubu University)

15/03/2024, 13:00

"The HEATES collaboration has been studying exotic atoms using an innovative X-ray detector known as “an array of superconducting Transition-Edge Sensor (TES) microcalorimeter” which has both excellent energy resolution and collection efficiency. Three experimental results on the kaonic and muonic atom studies have been published over the past few years [1-3], and a new challenging experiment...

20. Muon Penning Trap Experiment at J-PARC

Shoichiro Nishimura (KEK IMSS)

15/03/2024, 13:30

"Muon precision measurements are one of the powerful probes in the search for new physics beyond the Standard Model of particle physics. As an example, muon anomalous magnetic moment (g-2) measurements show a discrepancy between the Standard Model prediction and experimental values, which is considered to be a sign of new physics. In standard muon precision measurements, muons were either...

21. Mu-antiMu conversion search in J-PARC

Naritoshi Kawamura (KEK/J-PARC)

15/03/2024, 13:55

"The conversion from muonium (Mu, μ+e-) to anti-muonium (antiMu, μ-e+) is strongly suppressed in the Standard Model (SM) of particle physics because it violates the conservation of the leptonic family number. In many theories of SM extension, leptonic family numbers (lepton flavors) are not conserved and then the Mu-antiMu conversion can become observable level, just below the current...

24. Space time evolution of the lepton number densities including the momentum distribution

Takuya Morozumi (Hiroshima University)

15/03/2024, 14:45

"We investigate the Space time evolution of the lepton number densities.
The formulation is constructed as the time evolution of a lepton family number density operator.
The expectation value of the density operator is evaluated for the initial state with a Gaussian distribution for the momentum amplitude.
This enables us to study wave-packet-like decoherence effects.
We show in the...

23. Coherence amplification using atoms (ions) for fundamental physics

Akihiro Yoshimi (Okayama University)

15/03/2024, 15:10

"Coherent phenomena have potential applications in fundamental physics. We have proposed neutrino mass spectroscopy using atomic targets, by utilizing the “coherence-amplification” of the weak neutrino-emission process. I will mainly report on recent activity on coherence-related proposals and experiments using the doped ion in crystals [1,2], and some related topics.

[1] H. Hara, J. Han et...

22. Disentangle neutrino electromagnetic properties with atomic radiative pair emission

Shao-Feng Ge (TDLI/SJTU)

15/03/2024, 15:35

"We elaborate the possibility of using the atomic radiative emission of neutrino pair (RENP) to probe the neutrino electromagnetic properties, including magnetic and electric dipole moments, charge radius, and anapole. With the typical O(eV) momentum transfer, the atomic RENP is sensitive to not just the tiny neutrino masses but also very light mediators to which the massless photon belongs....