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

Mullier, Geoffrey; Haug, Sigve; Weber, Michael; Meloni, Federico; Cervelli, Alberto; Beck, Hans Peter; Stucci, Stefania; Ereditato, Antonio (2016). A search for an excited muon decaying to a muon and two jets in pp collisions at √s = 8 TeV with the ATLAS detector. New journal of physics, 18(7), 073021. Institute of Physics Publishing IOP 10.1088/1367-2630/18/7/073021

Preview	Text 1601.05627.pdf - Accepted Version Available under License Creative Commons: Attribution (CC-BY). Download (617kB) | Preview
Preview	Text Aad_2016_New_J._Phys._18_073021.pdf - Published Version Available under License Creative Commons: Attribution (CC-BY). Download (2MB) | Preview

A new search signature for excited leptons is explored. Excited muons are sought in the channel pp→μμ* →μμ jet jet , 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 √s= 8 TeV 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 mμ*. For mμ* between 1.3 TeV and 3.0 TeV, the upper limit on σB(μ* →μqq) is between 0.6 and 1 fb. Limits on σB are converted to lower bounds on the compositeness scale Λ . In the limiting case Λ=m μ*, excited muons with a mass below 2.8 TeV are excluded. With the same model assumptions, these limits at larger μ* masses improve upon previous limits from traditional searches based on the gauge-mediated decay μ* →μγ.

Interest & Impact

Downloads

171 since deposited on 11 Aug 2017
10 in the past 12 months

Citations

5 Citations in Web of Science ®
6 Citations in Scopus

Search

in Google Scholar™

Services

Actions (login required)

Edit item

Actions (login required)

Edit item