Implications of the upper bound on $\mathbf{h}\to {\mathbf{\mu }}^{+}{\mathbf{\mu }}^{-}$ on the baryon asymmetry of the Universe

Abstract

The upper bounds from the ATLAS and CMS experiments on the decay rate of the Higgs boson to two muons provide the strongest constraint on an imaginary part of the muon Yukawa coupling. This bound is more than an order of magnitude stronger than bounds from $\mathcal{C}\mathcal{P}$-violating observables, specifically the electric dipole moment of the electron. It excludes a scenario $-$ which had been viable prior to these measurements $-$ that a complex muon Yukawa coupling is the dominant source of the baryon asymmetry. Even with this bound, the muon source can still contribute $\mathcal{O}(16\%)$ of the asymmetry.

arXiv comment5 pages, 1 figure

References in corpus (16)

• Observation of a new particle in the search for the Standard Model Higgs boson with the ATLAS detector at the LHC
• Planck 2015 results. XIII. Cosmological parameters
• Observation of a new boson at a mass of 125 GeV with the CMS experiment at the LHC
• Electroweak baryogenesis
• Standard Model CP-violation and Baryon asymmetry
• Electroweak Baryogenesis and Standard Model CP Violation
• First-Order Electroweak Phase Transition in the Standard Model with a Low Cutoff
• Testing Electroweak Baryogenesis with Future Colliders
• Constraints on CP-violating Higgs couplings to the third generation
• Probing the Electroweak Phase Transition with Higgs Factories and Gravitational Waves
• EFT approach to the electron Electric Dipole Moment at the two-loop level
• A New Probe of Naturalness
• Electroweak Baryogenesis and the Standard Model Effective Field Theory
• Search for the Higgs boson decaying to two muons in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• The role of leptons in electroweak baryogenesis
• The Higgs program and open questions in particle physics and cosmology

Cited by in corpus (8)

• $CP$ violation from $\tau$, $t$ and $b$ dimension-6 Yukawa couplings -- interplay of baryogenesis, EDM and Higgs physics
• Constraining the CP structure of Higgs-fermion couplings with a global LHC fit, the electron EDM and baryogenesis
• Lepton-mediated electroweak baryogenesis, gravitational waves and the $4\tau$ final state at the collider
• Global Constraints on Yukawa Operators in the Standard Model Effective Theory
• Probing the Higgs boson through Yukawa force
• Current bounds on baryogenesis from complex Yukawa couplings of light fermions
• Analytic Techniques for Solving the Transport Equations in Electroweak Baryogenesis
• Bubble Trouble: a Review on Electroweak Baryogenesis