Electroweak Baryogenesis with Lepton Flavor Violation

Abstract

We investigate the feasibility of electroweak baryogenesis in a two-Higgs doublet model with lepton flavor violation. By scrutinizing the heavy Higgs boson mass spectrum, regions satisfying both strong first-order electroweak phase transition and the muon $g-2$ anomaly are identified. We also estimate the baryon number density by exploiting extra Yukawa couplings in the $\mu$-$\tau$ sector. It is found that a CP-violating source term can be enhanced by the $\mu$-$\tau$ flavor-violating coupling together with the extra $\tau$ coupling. With $\mathcal{O}(1)$ Yukawa couplings and CP-violating phases, the observed baryon number density is marginally produced under a generous assumption for the bubble wall profile.

8 pages, 3 figures; v2: references added and typos corrected; v3: new figure added, version to appear in Phys.Lett.B

References in corpus (5)

• Imprints of massive inverse seesaw model neutrinos in lepton flavor violating Higgs boson decays
• Echoes of the Electroweak Phase Transition: Discovering a second Higgs doublet through $A_0\to H_{0}Z$
• From Boltzmann equations to steady wall velocities
• Improved sphaleron decoupling condition and the Higgs coupling constants in the real singlet-extended SM
• Electroweak phase transition, critical bubbles and sphaleron decoupling condition in the MSSM

Cited by in corpus (4)

• Strong First Order Electroweak Phase Transition in the CP-Conserving 2HDM Revisited
• Semi-analytic techniques for calculating bubble wall profiles
• Flavor Physics and CP Violation
• One-loop considerations for coexisting vacua in the CP conserving 2HDM