ACP Seminar (Astronomy - Cosmology - Particle Physics)

Speaker: Shufang Su (Arizona)
Title: Low-Mass Higgs Bosons in the NMSSM and Their LHC Implications
Date (JST): Fri, Mar 08, 2013, 13:30 - 14:30
Place: Seminar Room A
Abstract: We study the Higgs sector of the Next to Minimal Supersymmetric Standard Model (NMSSM)in light of the discovery of the SM-like Higgs boson at the LHC. We perform a broad scan over the NMSSM parameter space and identify the regions that are consistent with current Higgs search results at colliders. In contrast to the commonly studied ``decoupling'' scenario in the literature where the MSSM CP-odd Higgs boson mass is large mA>>mZ, we pay particular attention to the light Higgs states in the case when mA ~ mZ. The Higgs bosons in the NMSSM, namely three CP-even states, two CP-odd states, and two charged Higgs states, could all be rather light, near or below the electroweak scale, although the singlet-like states can be heavier. The SM-like Higgs boson could be either the lightest CP-even scalar or the second lightest CP-even scalar. These NMSSM parameter regions have unique properties and offer rich phenomenology. The decay branching fractions for the SM-like Higgs boson may be modified appreciably. The new Higgs bosons may be readily produced at the LHC and may decay to non-standard distinctive final states. We evaluate the production and decay of the Higgs bosons in this model and comment on further searches at the LHC to probe the Higgs sector of the NMSSM.