Non-standard semileptonic hyperon decays

TL;DR

This paper explores the potential of semileptonic hyperon decays to detect new physics at TeV scales, highlighting their sensitivity to scalar and tensor interactions and their complementarity with LHC searches.

Contribution

It introduces a systematic approach to analyze hyperon decays with reduced hadronic uncertainties, emphasizing their sensitivity to non-standard scalar and tensor contributions.

Findings

Muonic decay modes are highly sensitive to new scalar and tensor interactions.

Hyperon decays can complement LHC searches for new physics.

Systematic expansions improve prediction accuracy for hyperon decay rates.

Abstract

We investigate the discovery potential of semileptonic hyperon decays in terms of searches of new physics at teraelectronvolt scales. These decays are controlled by a small $SU(3)$-flavor breaking parameter that allows for systematic expansions and accurate predictions in terms of a reduced dependence on hadronic form factors. We find that muonic modes are very sensitive to non-standard scalar and tensor contributions and demonstrate that these could provide a powerful synergy with direct searches of new physics at the LHC.