Higgs bosons near 125 GeV in the NMSSM with constraints at the GUT scale

Abstract : We study the NMSSM with universal Susy breaking terms (besides the Higgs sector) at the GUT scale. Within this constrained parameter space, it is not difficult to find a Higgs boson with a mass of about 125 GeV and an enhanced cross section in the diphoton channel. An additional lighter Higgs boson with reduced couplings and a mass <123 GeV is potentially observable at the LHC. The NMSSM-specific Yukawa couplings lambda and kappa are relatively large and tan(beta) is small, such that lambda, kappa and the top Yukawa coupling are of order 1 at the GUT scale. The lightest stop can be as light as 105 GeV, and the fine-tuning is modest. WMAP constraints can be satisfied by a dominantly higgsino-like LSP with substantial bino, wino and singlino admixtures and a mass of ~60-90 GeV, which would potentially be detectable by XENON100.
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Article dans une revue
Advances in High Energy Physics, Hindawi Publishing Corporation, 2012, 2012, pp.625389. 〈10.1155/2012/625389〉
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https://hal.archives-ouvertes.fr/hal-00682132
Contributeur : Patricia Dubois-Violette <>
Soumis le : vendredi 23 mars 2012 - 15:51:28
Dernière modification le : mardi 10 octobre 2017 - 16:16:26

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Ulrich Ellwanger, Cyril Hugonie. Higgs bosons near 125 GeV in the NMSSM with constraints at the GUT scale. Advances in High Energy Physics, Hindawi Publishing Corporation, 2012, 2012, pp.625389. 〈10.1155/2012/625389〉. 〈hal-00682132〉

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