Standard Model CP-violation and Baryon asymmetry

1993/12/02 by M. B. Gavela, M.B. Gavela, Pilar Hernández +3 · 1 voice · 44 citations
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #Particle physics theoretical and experimental studies #hep-ph

paper · pdf · doi:10.1142/s0217732394000629

published as Mod.Phys.Lett.A9:795-810,1994 · 15p, LaTeX (3figs incl.), CERN 93/7081,LPTHE Orsay-93/48,HUTP-93/A036,HD-THEP-93-45

arxiv created 1993/12/02 · openalex publication_date 1994/03/21 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/31

Abstract

Simply based on CP arguments, we argue against a Standard Model explanation of the baryon asymmetry of the universe in the presence of a first order phase transition. A CP-asymmetry is found in the reflection coefficients of quarks hitting the phase boundary created during the electroweak transition. The problem is analyzed both in an academic zero temperature case and in the realistic finite temperature one. The building blocks are similar in both cases: Kobayashi-Maskawa CP-violation, CP-even phases in the reflection coefficients of quarks, and physical transitions due to fermion self-energies. In both cases an effect is present at order α_W² in rate. A standard GIM behaviour is found as intuitively expected. In the finite temperature case, a crucial role is played by the damping rate of quasi-particles in a hot plasma, which is a relevant scale together with M_W and the temperature. The effect is many orders of magnitude below what observation requires, and indicates that non standard physics is indeed needed in the cosmological scenario.

Cited by

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• Nonperturbative Renormalization of the Quark Chromoelectric Dipole Moment with the Gradient Flow:Power Divergences
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• Benchmarking a fading window: electroweak baryogenesis in the C2HDM, LHC constraints after Run 2 and prospects for LISA
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• Electroweak phase transition in two Higgs doublet models
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• Improved sphaleron decoupling condition and the Higgs coupling constants in the real singlet-extended standard model
• Dynamics of two-Higgs-doubletCPviolation and baryogenesis at the electroweak phase transition
• Decoherence in an interacting quantum field theory: Thermal case
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• ExplicitCPviolation in a MSSM with an extraU(1)′
• Axionic electroweak baryogenesis
• CP-violation and unitarity triangle test of the Standard Model
• Electroweak baryogenesis
• Search for New Physics with Atoms and Molecules
• Observation of the decay Λ b 0 → pK − μ + μ − and a search for CP violation
• Electroweak phase transition in ultraminimal technicolor
• Baryogenesis via mesino oscillations
• Neutrino oscillations v.s. leptogenesis in SO(10) models
• Two-step electroweak baryogenesis
• The light stop scenario from gauge mediation
• The minimal fermionic model of electroweak baryogenesis
• Probing leptogenesis
• ARS leptogenesis
• Natural cold baryogenesis from strongly interacting electroweak symmetry breaking
• Statistical operator for electroweak baryogenesis
• The MOMENT to search for CP violation
• Reassessing the sensitivity to leptonic CP violation
• Electroweak baryogenesis and the standard model effective field theory
• Progress in \cal CP violating top-Higgs coupling at the LHC with Machine Learning
• Impact of dimension-8 SMEFT operators on baryogenesis via sphaleron decoupling
• Strongly electroweak phase transition with U(1)_Lμ-Lτ gauged non-zero hypercharge triplet
• Electroweak baryogenesis in 2HDM without EDM cancellation
• ProbingCP-violatinght¯tcoupling ine+e−→hγ

Discussions

• In some sense this is more an elaborated comment than an answer but I will post it anyway. First of all no "model independent" statement can be made. When we argue that there is not enough CP violatio [stackexchange, 1 points]

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