Singlet superfield extension of the minimal supersymmetric standard model with pecceiquinn symmetry and a light pseudoscalar higgs boson at the LHC

摘要

Motivated by the μ-problem and the axion solution to the strong CP-problem, we extend the MSSM with one more chiral singlet field X_(ew). The underlying PQ-symmetry allows only one more renormalizable term X_(ew) H_u H_d in the superpotential. The spectrum of the Higgs system includes a light pseudoscalar a_X (in addition to the standard CP-even Higgs boson), predominantly decaying to two photons: a_X →γγ. Both Higgs bosons might be in the range accessible to current LHC experiments.