IFLP   13074
INSTITUTO DE FISICA LA PLATA
Unidad Ejecutora - UE
artículos
Título:
Search for excited electrons and muons in ps = 8 TeV proton?proton collisions with the ATLAS detector
Autor/es:
ATLAS COLLABORATION, G. AAD, M.T. DOVA ET AL
Revista:
NEW JOURNAL OF PHYSICS
Editorial:
IOP PUBLISHING LTD
Referencias:
Lugar: Londres; Año: 2013 vol. 15 p. 93011 - 93022
ISSN:
1367-2630
Resumen:
The ATLAS detector at the LHC is used to search for excited electrons and excited muons in the channel pp → ℓℓ∗ → ℓℓγ, assuming that excited leptons are produced via contact interactions. The analysis is based on 13 fb−1 of pp collisions at a centre-of-mass energy of 8 TeV. No evidence for excited leptons is found, and a limit is set at the 95% credibility level on the cross section times branching ratio as a function of the excited-lepton mass mℓ . For mℓ ≥ 0.8 TeV, the respective upper limits on σB(ℓ∗ → ℓγ) are 0.75 fb and 0.90 fb for the e∗ and μ∗ searches. Limits on σB are converted into lower bounds on the compositeness scale . In the special case where = mℓ, excited-electron and excited-muon masses below 2.2 TeV are excluded.