1208.2555 (Kyu Jung Bae et al.)

Peccei-Quinn NMSSM in the light of 125 GeV Higgs    [PDF]

Kyu Jung Bae, Kiwoon Choi, Eung Jin Chun, Sang Hui Im, Chan Beom Park, Chang Sub Shin

We study the phenomenology of the Peccei-Quinn invariant extension of the next-to-minimal supersymmetric standard model (NMSSM) in view of the recent discovery of a 125 GeV Higgs boson. The minimal model having no quadratic and cubic terms of the NMSSM singlet field predicts a light singlino-like lightest supersymmetric particle (LSP). The model is strongly disfavored considering the Higgs invisible decay and the dark matter characteristic of the LSP in the standard cosmology. However, the saxion, a CP-even companion of the axion in the Peccei-Quinn sector, can cause a late-time entropy production to suppress the dangerous thermal LSP density eliminating the problems with the LSP dark matter. The collider signal of the model contains multi-jet and $h/W/Z$ plus missing energy, which can be discovered in the early stage of the 14 TeV LHC running.

View original: http://arxiv.org/abs/1208.2555