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

Nov, 2010

18 pages

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Abstract: (arXiv)

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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