title: Dark light-Higgs bosons.
abstract: We study a limit of the nearly Peccei-Quinn-symmetric next-to-minimal supersymmetric standard model possessing novel Higgs and dark matter (DM) properties. In this scenario, there naturally coexist three light singletlike particles: a scalar, a pseudoscalar, and a singlinolike DM candidate, all with masses of order 0.1-10 GeV. The decay of a standard model-like Higgs boson to pairs of the light scalars or pseudoscalars is generically suppressed, avoiding constraints from collider searches for these channels. For a certain parameter window annihilation into the light pseudoscalar and exchange of the light scalar with nucleons allow the singlino to achieve the correct relic density and a large direct-detection cross section consistent with the DM direct-detection experiments, CoGeNT and DAMA/LIBRA, preferred region simultaneously. This parameter space is consistent with experimental constraints from LEP, the Tevatron, Υ, and flavor physics.
authors.affiliation: Enrico Fermi Institute, University of Chicago, Chicago, Illinois 60637, USA.
authors.forename: Patrick
authors.initials: P
authors.lastname: Draper
authors.forename: Tao
authors.initials: T
authors.lastname: Liu
authors.forename: Carlos E M
authors.initials: CE
authors.lastname: Wagner
authors.forename: Lian-Tao
authors.initials: LT
authors.lastname: Wang
authors.forename: Hao
authors.initials: H
authors.lastname: Zhang