Search for excited leptons in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector

Abstract

The ATLAS detector is used to search for excited leptons in the electromagnetic radiative decay channel l* --> l+gamma. Results are presented based on the analysis of pp collisions at a center-of-mass energy of 7 TeV corresponding to an integrated luminosity of 2.05/fb. No evidence for excited leptons is found, and limits are set on the compositeness scale Lambda as a function of the excited lepton mass m_l*. In the special case where Lambda = m_l*, excited electron and muon masses below 1.87 TeV and 1.75 TeV are excluded at 95% C.L., respectively.

10 pages plus author list (22 pages total), 8 figures, 2 tables, revised author list, matches Physical Review D version

References in corpus (12)

• PYTHIA 6.4 Physics and Manual
• Parton distributions for the LHC
• Event generation with SHERPA 1.1
• Implications of CTEQ global analysis for collider observables
• -- HATHOR -- HAdronic Top and Heavy quarks crOss section calculatoR
• Electroweak gauge boson production at hadron colliders through O(alpha_s^2)
• Parton Distributions for LO Generators
• Theoretical status and prospects for top-quark pair production at hadron colliders
• Search for dilepton resonances in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector
• Search for excited electrons in ppbar collisions at sqrt(s) = 1.96 TeV
• Search for Excited Muons in ppbar Collisions at sqrt(s) = 1.96 TeV
• Search for excited leptons in e+e- collisions at sqrt{s}=189-209 GeV

Cited by in corpus (13)

• A Large Hadron Electron Collider at CERN: Report on the Physics and Design Concepts for Machine and Detector
• Search for excited electrons and muons in sqrt(s)=8 TeV proton-proton collisions with the ATLAS detector
• Probing Color Octet Electrons at the LHC
• Exotic leptons at future linear colliders
• Search for excited leptons in pp collisions at sqrt(s) = 7 TeV
• Search for excited electrons through $\gamma \gamma$ scattering
• Search for excited leptons in $\ell \ell \gamma$ final states in proton-proton collisions at $\sqrt{s}=$ 13 TeV
• Search for excited electrons singly produced in proton-proton collisions at $\sqrt{s}=13$ TeV with the ATLAS experiment at the LHC
• Search for anomalous production of highly boosted Z bosons decaying to dimuons in proton-proton collisions at sqrt(s) = 7 TeV
• QCD corrections to excited lepton (pair) production at LHC
• A search for an excited muon decaying to a muon and two jets in $pp$ collisions at $\sqrt{s}$ = 8 TeV with the ATLAS detector
• Searching for spin-3/2 leptons
• Searches for New Phenomena at the LHC