CP violation beyond the MSSM: baryogenesis and electric dipole moments

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 t...

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Bibliographic Details
Published in:The journal of high energy physics 2010-05, Vol.2010 (5), Article 101
Main Authors: Blum, Kfir, Delaunay, Cedric, Losada, Marta, Nir, Yosef, Tulin, Sean
Format: Article
Language:English
Subjects:
Classical and Quantum Gravitation
Cosmology
CP violation
Dipole moments
Electric dipoles
Elementary Particles
High energy physics
Physics
Physics and Astronomy
Quantum Field Theories
Quantum Field Theory
Quantum Physics
Relativity Theory
String Theory
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Summary: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.
ISSN:1029-8479
1029-8479
DOI:10.1007/JHEP05(2010)101