Implications of a light stop for the spontaneous CP breaking at finite temperature in a nonminimal supersymmetric standard model

Abstract

We study the implications of a light stop for the spontaneous CP breaking at finite temperature in the Higgs sector of the Minimal Supersymmetric Standard Model with a gauge singlet. Assuming CP conservation at zero temperature, we show that the presence of a large mixing between the left- and the right-handed stops can trigger easily the spontaneous breaking of CP inside the bubbles nucleated during the electroweak phase transition. This allows to avoid the fine-tuning among the vacuum expectation values in the region of interest for the generation of the baryon asymmetry, namely the bubble walls, which has been recently analized.

arXiv comment11 pages, DFPD/TH/51/94, 2 figures available upon e-mail request

References in corpus (17)

• Progress in Electroweak Baryogenesis
• Baryon Asymmetry of the Universe in the Minimal Standard Model
• Particle Spectrum in Supersymmetric Models with a Gauge Singlet
• Higgs boson bounds in non-minimal supersymmetric standard models
• The Electroweak Phase Transition in a Nonminimal Supersymmetric Model
• Radiative Corrections to Higgs Boson Masses in the Next-to-Minimal Supersymmetric Standard Model
• Radiative Corrections to the Neutral Higgs Spectrum in Supersymmetry with a Gauge Singlet
• Calculable Upper Limit on the Mass of the Lightest Higgs Boson in Any Perturbatively Valid Supersymmetric Theory
• On the electroweak phase transition in the Minimal Supersymmetric Standard Model
• Supersymmetric Higgs Bosons at the Limit
• Aspects of the electroweak phase transition in the Minimal Supersymmetric Standard Model
• Higgs sector CP violation in the Minimal Supersymmetric Model
• Supersymmtric Baryogenesis
• Spontaneous CP Violation and Baryogenesis in the Minimal Supersymmetric Standard Model
• Spontaneous CP Violation in the Minimal Supersymmetric Standard Model at Finite Temperature
• On the Spontaneous CP Breaking in the Higgs Sector of the Minimal Supersymmetric Standard Model
• Can Stop be Light Enough ?

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• Electroweak baryogenesis and low energy supersymmetry
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• Top Dipole Form Factors and Loop-induced CP-violation in Supersymmetry
• Towards a Nonequilibrium Quantum Field Theory Approach to Electroweak Baryogenesis
• CP Violating Bubble Wall Profiles
• Higgs sector CP-violation at the electroweak phase transition
• Baryogenesis from Domain Walls in the Next-to-Minimal Supersymmetric Standard Model
• Particle Currents on a CP Violating Higgs Background and the Spontaneous Baryogenesis Mechanism
• Particle Currents in a Space-Time dependent and CP-violating Higgs Background: a Field Theory Approach