KEK Theory Meeting on Particle Physics Phenomenology (KEK-PH2026winter)

Session

parallel session B: Cosmo

17 Feb 2026, 10:40

meeting room

Conveners

parallel session B: Cosmo

• Yohei Ema

17. Thermal precondensation in gauge-fermion theories and its cosmological implications

Alvaro Pastor Gutierrez

17/02/2026, 10:40

19. Screening Effects of Finite-Mass Fermions in Monopole Baryogenesis Scenario

Yukito Kato

17/02/2026, 11:00

To investigate the finite mass effects in recently proposed monopole baryogenesis scenario, this study analyzes screening effect for the electric monopole charge, induced by CP-violating theta term, within a 't Hooft-Polyakov monopole background. Utilizing partial wave expansion and bosonized effective field theory for the massive charged fermions, we demonstrate that fermion finite masses...

18. Electromagnetic leptogenesis in an effective field theory

Rin Takada

We present a unified, gauge-invariant EFT analysis of low-scale electromagnetic leptogenesis sourced by CP-violating neutrino–gauge dipole interactions. We first match UV-complete models onto the dimension-six effective operator, and evaluate the decay widths, CP asymmetries, and the corresponding transport equations in the electroweak-broken phase. We then show that the suppression arising...