2009/06/30 by Nicolás Bernal, Nicolas Bernal, Kfir Blum +3 · 4 citations
Physics and Astronomy · #Astrophysics #Baryogenesis #CMB cold spot #Collider #Cosmic microwave background #Cosmology #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Dark matter #Electroweak interaction #Hierarchy problem #Higgs boson #Minimal Supersymmetric Standard Model #Particle physics #Particle physics theoretical and experimental studies #Physics #Quantum mechanics #Supersymmetry #hep-ph
paper · pdf · doi:10.1088/1126-6708/2009/08/053
published as JHEP 0908:053,2009 · 28 pages, 4 figures. References added
arxiv created 2009/07/15 · openalex publication_date 2009/08/13 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
The addition of non-renormalizable terms involving the Higgs fields to the MSSM (BMSSM) ameliorates the little hierarchy problem of the MSSM. We analyze in detail the two main cosmological issues affected by the BMSSM: dark matter and baryogenesis. The regions for which the relic abundance of the LSP is consistent with WMAP and collider constraints are identified, showing that the bulk region and other previously excluded regions are now permitted. Requiring vacuum stability limits the allowed regions. Based on a two-loop finite temperature effective potential analysis, we show that the electroweak phase transition can be sufficiently first order in regions that for the MSSM are incompatible with the LEP Higgs mass bound, including parameter values of tanβ\lsim 5, m_t1 > mt, mQ << TeV.