Peccei-Quinn NMSSM in the light of 125 GeV Higgs
arXiv:1208.2555 · doi:10.1007/JHEP11(2012)118
Abstract
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 constrained by the Higgs invisible decay and the dark matter characteristic of the LSP, while some constraints can be relaxed by assuming that the saxion, the CP-even companion of the axion in the Peccei-Quinn sector, causes a late-time entropy production diluting the thermal LSP density. The collider signal of the model contains multi-jet and plus missing energy, which can be discovered in the early stage of the 14 TeV LHC running.
arXiv comment40 pages, 10 figures, 6 tables. v3: references added, several statements added and corrected, comments on the small tadpole soft term added in sec. 2.3
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