Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2006-06-09
JHEP 0703:073,2007
Physics
High Energy Physics
High Energy Physics - Phenomenology
Revtex4, 13 pages including 4 figures. Improved analysis including the opening angle distribution between the two photons from
Scientific paper
10.1088/1126-6708/2007/03/073
In the next-to-minimal supersymmetric standard model (NMSSM), the unique $\lambda S H_u H_d$ in the superpotential gives rise to a coupling involving the lighter pseudoscalar Higgs boson and a pair of charged or neutral Higgsinos, even in the limit of zero mixing between the two pseudoscalar Higgs bosons. We study the associated production of a very light pseudoscalar Higgs boson with a pair of charginos. The novel signature involves a pair of charged leptons from chargino decays and a pair of photons from the pseudoscalar Higgs boson decay, plus large missing energy at the LHC and ILC. The signal may help us to distinguish the NMSSM from MSSM, provided that the experiment can resolve the two photons from the decay of the pseudoscalar Higgs boson.
Arhrib Abdesslam
Cheung Kingman
Hou Tie-Jiun
Song Kok-Wee
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