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

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• Semi-analytic techniques for calculating bubble wall profiles
• New benchmark scenarios of electroweak baryogenesis in aligned two Higgs double models
• CP-violating transport theory for Electroweak Baryogenesis with thermal corrections
• Flavor Physics and CP Violation
• A New bound on CP Violation in the $\tau$ Lepton Yukawa Coupling and electroweak baryogenesis
• Collider Prospects for Muon $g-2$ in General Two Higgs Doublet Model
• Decadal Mission for the New Physics Higgs/Flavor Era
• The Charged Higgs from the Bottom-Up: Probing Flavor at the LHC
• Electroweak baryogenesis between broken phases in multi-step phase transition
• One-loop considerations for coexisting vacua in the CP conserving 2HDM
• Scattering Entanglement Entropy and Its Implications for Electroweak Phase Transitions
• Measuring $CP$ nature of $h\tau \bar{\tau }$ coupling at $e^{-}p$ collider
• Charged lepton flavor violation in light of Muon $g-2$
• Electroweak baryogenesis via bottom transport: complementarity between LHC and future lepton collider probes
• Gravitational Wave Production and Baryogenesis in a Simple Left-Right model