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American Physical Society, Physical Review D, 5(87)

DOI: 10.1103/physrevd.87.055018

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Electroweak baryogenesis inR-symmetric supersymmetry

Journal article published in 2013 by R. Fok, Graham D. Kribs, Adam Martin, Yuhsin Tsai ORCID
This paper is made freely available by the publisher.
This paper is made freely available by the publisher.

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Abstract

We demonstrate that electroweak baryogenesis can occur in a supersymmetric model with an exact R-symmetry. The minimal R-symmetric supersymmetric model contains chiral superfields in the adjoint representation, giving Dirac gaugino masses, and an additional set of "R-partner" Higgs superfields, giving R-symmetric μ-terms. New superpotential couplings between the adjoints and the Higgs fields can simultaneously increase the strength of the electroweak phase transition and provide additional tree-level contributions to the lightest Higgs mass. Notably, no light stop is present in this framework, and in fact, we require both stops to be above a few TeV to provide sufficient radiative corrections to the lightest Higgs mass to bring it up to 125 GeV. Large CP-violating phases in the gaugino/higgsino sector allow us to match the baryon asymmetry of the Universe with no constraints from electric dipole moments due to R-symmetry. We briefly discuss some of the more interesting phenomenology, particularly of the of the lightest CP-odd scalar. ; Comment: 17 pages, 8 figures