2012/01/31 by A. Delgado, Antonio Delgado, Germano Nardini +2
Physics and Astronomy · #Baryogenesis #Baryon asymmetry #Cosmology and Gravitation Theories #Dark Matter and Cosmic Phenomena #Electroweak interaction #Gaugino #Higgs boson #Higgsino #Mathematical physics #Minimal Supersymmetric Standard Model #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Renormalization group #Supersymmetry #Supersymmetry breaking #hep-ph
paper · pdf · doi:10.1007/jhep04(2012)137
20 pages, 3 figures; v2: changes in the conventions; v3: more details on the Higgs mass prediction, version published in JHEP
openalex publication_date 2012/04/01 · arxiv created 2012/04/25 · arxiv updated 2015/06/03 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
In this paper we embed the light stop scenario, a MSSM framework which explains the baryon asymmetry of the universe through a strong first order electroweak phase transition, in a top-down approach. The required low energy spectrum consists in the light SM-like Higgs, the right-handed stop, the gauginos and the Higgsinos while the remaining scalars are heavy. This spectrum is naturally driven by renormalization group evolution starting from a heavy scalar spectrum at high energies. The latter is obtained through a supersymmetry-breaking mix of gauge mediation, which provides the scalars masses by new gauge interactions, and gravity mediation, which generates gaugino and Higgsino masses. This supersymmetry breaking also explains the μ and Bμ parameters necessary for electroweak breaking and predicts small tri-linear mixing terms At in agreement with electroweak baryogenesis requirements. The minimal embedding predicts a Higgs mass around its experimental lower bound and by a small extension higher masses mH\lesssim 127 GeV can be accommodated.