Yu Hamada
(Kyoto University)
05/12/2018, 15:00
We propose a novel gauge-invariant regularization for the perturbative chiral gauge theory. Our method consists of the two ingredients: use of the domain-wall fermion to describe a chiral fermion with Pauli-Villars regulators and application of the dimensional regularization only to the gauge field. This regularization is implemented in the Lagrangian level, unlike other gauge-invariant...
Tae Gyu Ro
(Chung-Ang University)
05/12/2018, 15:00
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 B-meson decays in BaBar and/or Belle experiments. We consider the setup where scalar leptoquarks or extra U(1) gauge bosons have flavor-dependent couplings to the SM. In this work, we discuss the flavor...
Takuya Hasegawa
(SOKENDAI (KEK))
05/12/2018, 15:00
We study a possible minimum value of reheating temperature in terms of Big-Bang Nucleosynthesis by considering both radiative and hadronic decays of massive particles. In the current study, neutrino oscillation and neutrino self-interactions are also taken into account. We adopt updated observational bounds on the primordial abundance of light elements. We obtain the lower bound on the...
Patrick Copinger
(Tokyo University)
05/12/2018, 15:00
Schwinger pair production is examined in SU(2) (SL(2,C)) background fields through the worldline instanton method, whose non-Abelian equivalent stems from Wong’s equations. The role of group complexification for pair production in non-Abelian fields is elucidated. The gauge group winding number is compared and contrasted with the worldline instanton winding number, related to number of...
Takahiro Yoshida
(Niigata University)
05/12/2018, 15:00
We investigate a resonant leptogenesis by quasi-degenerate right-handed 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 Dirac-type CP phase and the Majorana-type CP phase. In addition, we discuss the impact on...
Yoshiki Uchida
(Nagoya University)
05/12/2018, 15:00
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...
