English

Testing the HyperCP anomaly at LHCb: evidence for the $\Sigma^+ \to p \mu^+ \mu^-$ decay

High Energy Physics - Experiment 2020-08-26 v1

Abstract

A search for Σ+pμ+μ\Sigma^+ \to p \mu^+ \mu^- decays with LHCb Run 1 data is presented, yielding an evidence for this decay and a measurement of a branching fraction compatible with the Standard Model. The HyperCP anomaly in the dimuon invariant mass distribution is not confirmed, and its branching fraction central value is excluded at 95\% CL. Prospects for the future of this measurement in LHCb are also presented.

Keywords

Cite

@article{arxiv.1910.14566,
  title  = {Testing the HyperCP anomaly at LHCb: evidence for the $\Sigma^+ \to p \mu^+ \mu^-$ decay},
  author = {Francesco Dettori},
  journal= {arXiv preprint arXiv:1910.14566},
  year   = {2020}
}

Comments

Proceedings contribution prepared for the International Conference on Kaon Physics 2019