The 4th Topics of Particle, Astro and Cosmo Frontiers (TOPAC 2026) 第4届粒子物理、天体物理和宇宙学前沿国际学术研讨会

Session

Plenary Theory 11: Flavor/Neutrinos (Room 567, Chair Raymond Volkas)

20 Apr 2026, 08:15

10. Spontaneous Leptogenesis in Type I Seesaw

EUNG JIN Chun (Korea Institute for Advanced Study)

20/04/2026, 08:15

Type-I seesaw models with a spontaneously broken B−L symmetry provide a natural framework for spontaneous leptogenesis driven by a Majoron. The kinetic background of the Majoron acts as a CP-violating source, generating a lepton asymmetry both through the decay of right-handed neutrinos and through equilibration via inverse-decay processes. We construct the Boltzmann equations in a fully...

128. Neutrinoless Double Beta Decay in the Multi‑Isotope Era: From Discovery to Mechanism

Frank Deppisch (University College London)

20/04/2026, 08:45

98. Semileptonic decay of heavy flavor meson

Xian-Wei Kang (Beijing Normal University)

20/04/2026, 09:15

The study of semileptonic decay plays an important role in extracting the CKM matrix element, where the relevant form factor encodes the nontrivial strong interaction dynamics. We will overview the current achievements on the semileptonic decay, especially from the viewpoint from the relativistic quark model. The observables such as branching fraction, forward-backward asymmetry and...