Electron Beam Dump Constraints on Light Bosons with Lepton Flavor Violating Couplings

TL;DR

This paper investigates constraints on light, weakly interacting bosons with lepton flavor violation using electron beam dump experiments, expanding the exclusion regions beyond muon decay limits and analyzing various interaction types.

Contribution

It provides new constraints on flavor-violating light bosons from electron beam dump data, including scalar, vector, and dipole interactions, beyond previous muon decay limits.

Findings

Excluded parameter regions from E137 experiment data.

Analyzed scalar, vector, and dipole boson interactions.

Identified potential for future flavor-violating decay searches.

Abstract

We study constraints on light and feebly interacting bosons with lepton flavor violation from electron beam dump experiments. Scalar, vector, and dipole interactions of the bosons are analyzed, respectively, and excluded regions from the searches for decays into electron-positron pairs are derived. It is found that parameter regions unconstrained by flavor violating decays of muon can be excluded using the results of the E137 experiment. We also discuss the impact of the search for flavor violating decays of the light bosons in electron beam dump experiments.