Search for Excited and Exotic Muons at CDF

TL;DR

This paper reports a search for excited and exotic muons using proton-antiproton collision data, aiming to identify potential new particles through resonance signatures in the mu-gamma spectrum.

Contribution

It introduces a novel search for excited muons at CDF, setting limits on their mass and interaction scale based on resonance analysis.

Findings

No significant resonance observed in mu-gamma spectrum

Limits set on excited muon mass and compositeness scale

Constraints improve previous bounds on mu* properties

Abstract

We present a search for the production of excited or exotic muons (mu*) via the reaction pbar + p -> mu* + mu -> mu gamma + mu using 371/pb of data collected with the Run II CDF detector. In this signature-based search, we look for a resonance in the mu-gamma mass spectrum. The data are compared to standard model and detector background expectations, and with predictions of excited muon production. We use these comparisons to set limits on the mu* mass and compositeness scale Lambda in the contact interaction and gauge-mediated models.