The Baryogenesis Window in the MSSM

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dc.creatorCarena, Marcela
dc.creatorNardini, Germano
dc.creatorQuiros, Mariano
dc.creatorWagner, Carlos E. M.
dc.date2008-09-22
dc.date2008-10-17
dc.date.accessioned2026-07-07T12:40:19Z
dc.date.available2026-07-07T12:40:19Z
dc.descriptionElectroweak 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.
dc.description26 pages, 6 figures; comments added
dc.identifierhttps://arxiv.org/abs/0809.3760
dc.identifierhttp://arxiv.org/abs/0809.3760
dc.identifierNucl.Phys.B812:243-263,2009
dc.identifierdoi:10.1016/j.nuclphysb.2008.12.014
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/219407
dc.subjectHigh Energy Physics - Phenomenology
dc.titleThe Baryogenesis Window in the MSSM
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