Low mass Higgs signals at the LHC in the Next-to-Minimal Supersymmetric Standard Model

Details Low mass Higgs signals at the LHC in the Next-to-Minimal Supersymmetric Standard Model Low mass Higgs signals at the LHC in the Next-to-Minimal Supersymmetric Standard Model

2010-11-30

arxiv.org/abs/1011.6547v2

Eur. Phys. J. C (2011) 71: 1618

Physics

High Energy Physics

High Energy Physics - Phenomenology

18 pages, 38 figures, Revised argument in section 3, new figures, number of figures has been reduced, results unchanged

Scientific paper

10.1140/epjc/s10052-011-1618-1

In the NMSSM, because of introducing a complex singlet superfield, the lightest CP-odd Higgs boson, $a_1$, can be a singlet-like state with a tiny doublet component in large regions of parameter space. In this paper, we examine the discovery potential of $a_1$ produced in association with a bottom-antibottom pair at the LHC through $\tau^+\tau^-$ and $\gamma\gamma$ decay modes. It is shown that an $a_1$ with mass $\leq M_Z$ can be extracted from the SM backgrounds by using the $\tau^+\tau^-$ decay channel, a possibility precluded to the MSSM. In contrast, the $\gamma\gamma$ decay mode is overwhelmed by backgrounds despite the fact that the branching ratio of this mode can reach unity when $a_1$ is a pure singlet.

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