IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
A search for an excited muon decaying to a muon and two jets in pp collisions at s√ = 8 TeV with the ATLAS detector
Autor/es:
F. MONTICELLI; ATLAS
Revista:
NEW JOURNAL OF PHYSICS
Editorial:
IOP PUBLISHING LTD
Referencias:
Lugar: Londres; Año: 2016
ISSN:
1367-2630
Resumen:
A new search signature for excited leptons is explored. Excited muons are sought in the channel pp→μμ∗→μμ jetjet, 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√=8TeV 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 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=mμ∗, 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.