Upsilon Decays into Scalar Dark Matter

TL;DR

This paper investigates how Upsilon meson decays into light scalar Dark Matter particles, providing model-independent formulas and comparing them with experimental data to constrain Dark Matter models.

Contribution

It offers a model-independent analysis of Upsilon decays into scalar Dark Matter and derives formulas for branching ratios to constrain related models.

Findings

Dark Matter production in Upsilon decays can impose constraints on model parameters

Derived formulas for decay branching ratios are consistent with experimental data

Potential to identify or limit light scalar Dark Matter through decay observations

Abstract

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 Dark Matter production in Upsilon decays may lead to constraints on parameters of the models containing a light spin-0 DM particle.