$Υ\toγA_1$ in the NMSSM at large tan beta

Details $Υ\toγA_1$ in the NMSSM at large tan beta $Υ\toγA_1$ in the NMSSM at large tan beta

2008-02-21

arxiv.org/abs/0802.3197v2

Phys.Lett.B665:219-221,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, LaTeX, 2 figures. Second result set for tan(beta)=10 included, clarifying remarks added, references updated. Version

Scientific paper

10.1016/j.physletb.2008.06.022

We investigate the effects of the radiatively-generated tan beta-enhanced Higgs-singlet Yukawa couplings on the decay $\Upsilon\to \gamma A_1$ in the NMSSM, where $A_1$ is the lightest CP-odd scalar. This radiative coupling is found to dominate in the case of a highly singlet Higgs pseudoscalar. The branching ratio for the production of such a particle is shown to be within a few orders of magnitude of current experimental constraints across a significant region of parameter space. This represents a potentially observable signal for experiments at present B-factories.

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