The Baryogenesis Window in the MSSM

Abstract

Electroweak baryogenesis provides an attractive explanation of the origin of the matter-antimatter asymmetry that relies on physics at the weak scale and thus it is testable at present and near future high-energy physics experiments. Although this scenario may not be realized within the Standard Model, it can be accommodated within the MSSM provided there are new CP-violating phases and the lightest stop mass is smaller than the top-quark mass. In this work we provide an evaluation of the values of the stop (m_{\tilde t}) and Higgs (m_H) masses consistent with the requirements of electroweak baryogenesis based on an analysis that makes use of the renormalization group improved Higgs and stop potentials, and including the dominant two-loop effects at high temperature. We find an allowed window in the (m_{\tilde t},m_H)-plane, consistent with all present experimental data, where there is a strongly first-order electroweak phase transition and where the electroweak vacuum is metastable but sufficiently long-lived. In particular we obtain absolute upper bounds on the Higgs and stop masses, m_H\lesssim 127 GeV and m_{\tilde t}\lesssim 120 GeV, implying that this scenario will be probed at the LHC.

26 pages, 6 figures; comments added

References in corpus (8)

• Production of Gravitational Waves in the nMSSM
• Light Stop Searches at the LHC in Events with One Hard Photon or Jet and Missing Energy
• The Effective Theory of the Light Stop Scenario
• Higgs-Higgsino-Gaugino Induced Two Loop Electric Dipole Moments
• Search for scalar top quarks in the acoplanar charm jets and missing transverse energy final state in $p\bar{p}$ collisions at $\sqrt{s}=1.96$ TeV
• Exploring compressed supersymmetry with same-sign top quarks at the Large Hadron Collider
• Search for Top Squarks at Tevatron Inspired by Dark Matter and Electroweak Baryogenesis
• Stop and sbottom searches at LEP

Cited by in corpus (7)

• Electroweak phase transition, critical bubbles and sphaleron decoupling condition in the MSSM
• The Effective Theory of the Light Stop Scenario
• Electroweak Phase Transition and LHC Signatures in the Singlet Majoron Model
• Mainly axion cold dark matter in the minimal supergravity model
• Higgs Boson Signatures of MSSM Electroweak Baryogenesis
• Radiative corrections to stoponium annihilation decays
• BMSSM Implications for Cosmology