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Higgs bosons near 125 GeV in the NMSSM with constraints at the GUT scale
Ellwanger U., Hugonie C.
Adv.High Energy Phys. 2012 (2012) 625389 - http://hal.archives-ouvertes.fr/hal-00682132
Physique/Physique des Hautes Energies - Phénoménologie
Higgs bosons near 125 GeV in the NMSSM with constraints at the GUT scale
Ulrich Ellwanger1, Cyril Hugonie2
1 :  LPT - Laboratoire de Physique Théorique d'Orsay [Orsay]
CNRS : UMR8627 – Université Paris XI - Paris Sud
Bâtiment 210 Université Paris XI 91405 Orsay Cedex
2 :  LUPM - Laboratoire Univers et Particules de Montpellier
CNRS : UMR5299 – Université Montpellier II - Sciences et techniques – IN2P3
Université de Montpellier II Place Eugène Bataillon - CC 72 34095 Montpellier Cédex 05
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.

Adv.High Energy Phys.
Articles dans des revues avec comité de lecture

20 pages, 14 figures
LPT-ORSAY 12-27 ; LUPM 12-010

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