# Study of muon pairs in hadronic events with bottom tag using L3 data recorded near the Z resonance

## TL;DR

This paper analyzes muon pairs in hadronic events with bottom quark tags using L3 data near the Z resonance, comparing observed di-muon mass spectra to Monte Carlo simulations to investigate potential anomalies.

## Contribution

It provides a measurement of the di-muon mass spectrum with bottom tags in L3 data and compares it to theoretical predictions, extending previous ALEPH findings.

## Key findings

- No significant excess near 30 GeV observed in L3 data
- Comparison with Monte Carlo predictions shows consistency within uncertainties
- Results contribute to understanding di-muon spectra in b-quark events

## Abstract

A recent publication based on ALEPH $\mathrm{e}^+\mathrm{e}^-$ data taken near the Z resonance reports an excess, near 30 GeV, in the di-muon mass spectrum for events containing b quarks. In this paper we measure the di-muon mass spectrum for L3 data with a bottom tag, recorded in the years 1994 and 1995 at the LEP collider at CERN, and compare it to Monte Carlo predictions.