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arXiv · 0802.3197

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

Robert N. Hodgkinson
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Abstract

We investigate the effects of the radiatively-generated tan beta-enhanced Higgs-singlet Yukawa couplings on the decay $Υ\to γA_1$ 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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Robert N. Hodgkinson. 2008-06-09. $Υ\toγA_1$ in the NMSSM at large tan beta. https://doi.org/10.1016/j.physletb.2008.06.022

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