Constraints on Scalar Leptoquark from Kaon Sector

TL;DR

This paper investigates how a TeV-scale scalar leptoquark could influence kaon processes, using experimental data to constrain the model and explore its potential to explain flavor physics anomalies.

Contribution

It provides new constraints on scalar leptoquark models based on kaon sector data, linking collider-accessible particles to flavor physics anomalies.

Findings

Constraints on leptoquark couplings from kaon mixing and decays

Limits on leptoquark mass and interactions consistent with experimental data

Implications for leptoquark explanations of flavor anomalies

Abstract

Recently, several anomalies in flavor physics have been observed, and it was noticed that leptoquarks might account for the deviations from the Standard Model. In this work, we examine the effects of new physics originating from a scalar leptoquark model on the kaon sector. The leptoquark we consider is a TeV-scale particle and within the reach of the LHC. We use the existing experimental data on the several kaon processes including $K^{0}-\bar{K}^{0}$ mixing, rare decays $K^{+} \rightarrow \pi^{+} \nu \bar{\nu}$, $ K_L \rightarrow \pi^0 \nu \bar{\nu}$, short-distance part of $K_L\rightarrow \mu^{+}\mu^{-}$, and lepton-flavor-violating decay $K_L\rightarrow \mu^{\pm} e^{\mp}$ to obtain useful constraints on the model.