$Υ$ Decays into Light Scalar Dark Matter

Details $Υ$ Decays into Light Scalar Dark Matter $Υ$ Decays into Light Scalar Dark Matter

2009-09-27

arxiv.org/abs/0909.4919v3

Phys.Rev.D80:115019,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

37 pages, 10 figures, the final version

Scientific paper

10.1103/PhysRevD.80.115019

We examine decays of a spin-1 bottomonium into a pair of light scalar Dark Matter (DM) particles, assuming that Dark Matter is produced due to exchange of heavy degrees of freedom. We perform a model-independent analysis and derive formulae for the branching ratios of these decays. We confront our calculation results with the experimental data. We show that the considered branching ratios are within the reach of the present BaBaR experimental sensitivity. Thus, Dark Matter production in Upsilon decays leads to constraints on parameters of various models containing a light spin-0 DM particle. We illustrate this for the models with a "WIMPless miracle", in particular for a Gauge Mediated SUSY breaking scenario, with a spin-0 DM particle in the hidden sector. Another example considered is the type II 2HDM with a scalar DM particle.

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