Analysis of $q_\mathrm{rec}^2$-distribution for $B\to K M_X$ and $B\to K^* M_X$ decays in a scalar-mediator dark-matter scenario

TL;DR

This paper investigates a scalar-mediator dark-matter model that explains the observed excess in B meson decays to K or K* and missing energy, matching experimental data and differential distributions.

Contribution

It demonstrates that the scalar-mediator dark-matter scenario aligns with experimental decay data and reproduces the observed excess and distribution shapes in B meson decays.

Findings

The model is consistent with experimental decay data.

It reproduces the excess in decay rates for B→K M_X and B→K* M_X.

The differential distributions in q_rec^2 are similar to observations.

Abstract

We demonstrate that the scalar-mediator dark-matter scenario is consistent with the experimental data on the decay $B\to K M_X$ and provides a good description of the shape of the observed excess. Within this scenario, the interaction with dark-matter particles leads to approximately the same excess in $\Gamma(B\to K^* M_X)$ and $\Gamma(B\to K M_X)$ compared to the Standard Model; also the differential distributions of the excess events are similar in shape in the variable $q_\mathrm{rec}^2$ measured by experiment.