CP violation beyond the MSSM: Baryogenesis and electric dipole moments

Kfir Blum, Cedric Delaunay, Marta Losada, Yosef Nir, Sean Tulin

Research output: Contribution to journalArticle

Abstract

We study electroweak baryogenesis and electric dipole moments in the presence of the two leading-order, non-renormalizable operators in the Higgs sector of the MSSM. Significant qualitative and quantitative differences from MSSM baryogenesis arise due to the presence of new CP-violating phases and to the relaxation of constraints on the supersymmetric spectrum (in particular, both stops can be light). We find: (1) spontaneous baryogenesis, driven by a change in the phase of the Higgs vevs across the bubble wall, becomes possible; (2) the top and stop CP-violating sources can become effective; (3) baryogenesis is viable in larger parts of parameter space, alleviating the well-known finetuning associated with MSSM baryogenesis. Nevertheless, electric dipole moments should be measured if experimental sensitivities are improved by about one order of magnitude.

Original languageEnglish (US)
Article number101
JournalJournal of High Energy Physics
Volume2010
Issue number5
DOIs
StatePublished - Aug 2 2010

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Keywords

  • CP violation
  • Cosmology of theories beyond the SM
  • Supersymmetric standard model

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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