9–13 Sept 2026
Tsung-Dao Lee Institute
Asia/Shanghai timezone

Electroweak baryogenesis from charged current anomalies in $B$ meson decays

10 Sept 2026, 17:40
20m
Tsung-Dao Lee Institute/S5F-S510 - Meetingroom (Tsung-Dao Lee Institute)

Tsung-Dao Lee Institute/S5F-S510 - Meetingroom

Tsung-Dao Lee Institute

Oral Presentation Parallel talks (1B)

Speaker

Dr CRISTIAN FELIPE SIERRA FONSECA (Tsung-Dao Lee Institute)

Description

We demonstrate for the first time that new physics explaining the long standing charged $B$ meson anomalies, $R(D^{(*)})$, can be the source of CP violation that explains the observed baryon asymmetry of the universe (BAU). We consider the general two Higgs doublet model with complex Yukawa couplings and compute the BAU in the semiclassical formalism, using a novel analytic approximation for the latter. After imposing constraints from both flavor observables and the electron electric dipole moment (eEDM), we find that a significant BAU can still be generated for a variety of benchmark points in the parameter space, assuming the occurrence of a sufficiently strong first order electroweak phase transition. These scenarios, which explain both $R(D^{(*)})$ and the BAU, can be probed with future eEDM experiments and Higgs factories measurements.

Authors

Dr CRISTIAN FELIPE SIERRA FONSECA (Tsung-Dao Lee Institute) Prof. Michael Ramsey-Musolf Peter Athron (Nanjing Normal University) Yongcheng Wu (Nanjing Normal University)

Presentation materials

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