Search for the lepton flavor violating τ → 3μ decay in proton-proton collisions at s=13TeV

The CMS Collaboration

Research output: Contribution to journalArticlepeer-review

Abstract

A search for the lepton flavor violating τ→3μ decay is performed using proton-proton collision events at a center-of-mass energy of 13 TeV collected by the CMS experiment at the LHC in 2017–2018, corresponding to an integrated luminosity of 97.7 fb−1. Tau leptons produced in both heavy-flavor hadron and W boson decays are exploited in the analysis. No evidence for the decay is observed. The results of this search are combined with an earlier null result based on data collected in 2016 to obtain a total integrated luminosity of 131 fb−1. The observed (expected) upper limits on the branching fraction B(τ→3μ) at confidence levels of 90 and 95% are 2.9×10−8 (2.4×10−8) and 3.6×10−8 (3.0×10−8), respectively.

Original languageEnglish (US)
Article number138633
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume853
DOIs
StatePublished - Jun 2024

Keywords

  • BSM
  • CLFV
  • CMS
  • Charged lepton flavor violation

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Fingerprint

Dive into the research topics of 'Search for the lepton flavor violating τ → 3μ decay in proton-proton collisions at s=13TeV'. Together they form a unique fingerprint.

Cite this