Anomalous B meson mixing and baryogenesis in a two Higgs doublet model with top-charm flavor violation

Understand

There exist experimental hints from the B sector for CP violation beyond the Standard Model (SM) CKM paradigm.

• An anomalous dimuon asymmetry was reported by the D0 collaboration, while tension exists between $B \to \tau \nu$ and $S_{\psi K}$.
• These measurements, disfavoring the SM at the ~3$\sigma$ level, can be explained by new physics in both $B_d$-$\bar{B}_d$ and $B_s$- $\bar{B}_s$ mixing, arising from (1) new bosonic degrees of freedom at or near the electroweak scale, and (2) new, large CP-violating phases.
• These two new physics ingredients are precisely what is required for electroweak baryogenesis to work in an extension of the SM.