Electroweak Beautygenesis: From b {\to} s CP-violation to the Cosmic Baryon Asymmetry

TL;DR

This paper proposes a novel baryogenesis mechanism called Electroweak Beautygenesis, linking CP-violation in B_s mixing to the cosmic baryon asymmetry within a Two-Higgs-Doublet model, and discusses experimental tests.

Contribution

It introduces a new CP-violation driven baryogenesis mechanism connecting flavor physics to cosmology, less constrained by electric dipole moment limits.

Findings

The mechanism can generate the observed baryon asymmetry.

Flavor observables can test the proposed scenario.

The CP-phase involved is flavor off-diagonal, reducing EDM constraints.

Abstract

We address the possibility that CP-violation in $B_s-\bar B_s$ mixing may help explain the origin of the cosmic baryon asymmetry. We propose a new baryogenesis mechanism - "Electroweak Beautygenesis" - explicitly showing that these two CP-violating phenomena can be sourced by a common CP-phase. As an illustration, we work in the Two-Higgs-Doublet model. Because the relevant CP-phase is flavor off-diagonal, this mechanism is less severely constrained by null results of electric dipole moment searches than other scenarios. We show how measurements of flavor observables by the D0, CDF, and LHCb collaborations test this scenario.