A search for an excited muon decaying to a muon and two jets in pp collisions at √s = 8 TeV with the ATLAS detector

ATLAS Collaboration

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)
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Abstract

A new search signature for excited leptons is explored. Excited muons are sought in the channel , assuming both the production and decay occur via a contact interaction. The analysis is based on 20.3 fb−1 of pp collision data at a centre-of-mass energy of  taken with the ATLAS detector at the large hadron collider. No evidence of excited muons is found, and limits are set at the 95% confidence level on the cross section times branching ratio as a function of the excited-muon mass . For  between 1.3 and 3.0 TeV, the upper limit on ) is between 0.6 and 1 fb. Limits on  are converted to lower bounds on the compositeness scale Λ. In the limiting case , excited muons with a mass below 2.8 TeV are excluded. With the same model assumptions, these limits at larger  masses improve upon previous limits from traditional searches based on the gauge-mediated decay .
Original languageEnglish
JournalNew Journal of Physics
DOIs
Publication statusPublished - 11 Jul 2016

Bibliographical note

15 pages plus author list + cover page (32 pages total), 4 figures, 5 tables, submitted to New Journal of Physics, All figures including auxiliary are available at https://atlas.web.cern.ch/Atlas/GROUPS/PHYSICS/PAPERS/EXOT-2015-01

Keywords

  • hep-ex

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