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Journal Articles New Journal of Physics Year : 2013

Search for excited electrons and muons in sqrt(s)=8 TeV proton-proton collisions with the ATLAS detector

G. Aad , S. Albrand (1) , J. Brown (1) , Q. Buat (1) , B. Clement (1) , J. Collot (1) , S. Crépé-Renaudin (1) , B. Dechenaux (1) , T. Delemontex (1) , P.A. Delsart (1) , M.H. Genest (1) , J.Y. Hostachy (1) , E. Laisne (1) , B.T. Le (1) , F. Ledroit-Guillon (1) , A. Lleres (1) , A. Lucotte (1) , F. Malek (1) , C. Monini (1) , J. Stark (1) , X. Sun (1) , B. Trocmé (1) , G. Rahal (2) , S. Abdel Khalek (3) , E. Augé (3) , S. Binet (3) , C. Bourdarios (3) , C. de La Taille (3) , J.B. de Vivie de Regie (3) , L. Duflot (3) , M. Escalier (3) , L. Fayard (3) , D. Fournier (3) , J.-F. Grivaz (3) , T. Guillemin (3) , S. Henrot-Versillé (3) , J. Hrivnac (3) , L. Iconomidou-Fayard (3) , J. Idarraga (3) , M. Kado (3) , N. Lorenzo Martinez (3) , A. Lounis (3) , N. Makovec (3) , F. Niedercorn (3) , L. Poggioli (3) , P. Puzo (3) , A. Renaud (3) , D. Rousseau (3) , G. Rybkin (3) , J.B. Sauvan (3) , J. Schaarschmidt (3) , A.C. Schaffer (3) , E. Scifo (3) , L. Serin (3) , S. Simion (3) , R. Tanaka (3) , M. Teinturier (3) , H.L. Tran (3) , D. Zerwas (3) , Zhiqing Zhang (3) , L. Alio (4) , M. Barbero (4) , C. P. Bee (4) , C. Bertella (4) , N. Bousson (4) , J. C. Clémens (4) , Y. Coadou (4) , F. Djama (4) , F. Etienne (4) , L. Feligioni (4) , D. Hoffmann (4) , F. Hubaut (4) , E. B. F. G. Knoops (4) , E. Le Guirriec (4) , B. Li (4) , J. Maurer (4) , E. Monnier (4) , Y. Nagai (4) , J. Odier (4) , P. Pralavorio (4) , A. Rozanov (4) , T. Serre (4) , M. Talby (4) , N. Tannoury (4) , E. Tiouchichine (4) , S. Tisserant (4) , J. Toth (4) , F. Touchard (4) , M. Ughetto (4) , L. Vacavant (4) , N. Berger (5) , J. Colas (5) , M. Delmastro (5) , L. Di Ciaccio (5) , T.K.O. Doan (5) , S. Elles (5) , C. Goy (5) , T. Hryn'Ova (5) , S. Jézéquel (5) , H. Keoshkerian (5) , R. Lafaye (5) , J. Leveque (5) , V.P. Lombardo (5) , M. Maeno (5) , N. Massol (5) , P. Perrodo (5) , E. Petit (5) , H. Przysiezniak (5) , G. Sauvage (5) , E. Sauvan (5) , M. Schwoerer (5) , T. Todorov (5) , I. Wingerter-Seez (5) , R. Zitoun (5) , D. Boumediene (6) , Emmanuel Busato (6) , D. Calvet (6) , S. Calvet (6) , J. Donini (6) , E. Dubreuil (6) , N. Ghodbane (6) , Ph. Gris (6) , C. Guicheney (6) , H. Liao (6) , D. Pallin (6) , Daniela Paredes Hernández (6) , F. Podlyski (6) , C. Santoni (6) , Timothée Theveneaux-Pelzer (6) , Loïc Valery (6) , F. Vazeille (6)
G. Aad
E. Augé
D. Rousseau
Zhiqing Zhang
  • Function : Author
  • PersonId : 829631
Y. Coadou
N. Berger
C. Goy
T. Hryn'Ova
S. Calvet

Abstract

The ATLAS detector at the LHC is used to search for excited electrons and excited muons in the channel pp -> ll* -> llgamma, 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 m_l*. For m_l* > 0.8 TeV, the respective upper limits on sigma*B(l* -> lgamma) are 0.75 fb and 0.90 fb for the e* and mu* searches. Limits on sigma*B are converted into lower bounds on the compositeness scale Lambda. In the special case where Lambda = m_l*, excited-electron and excited-muon masses below 2.2 TeV are excluded.

Dates and versions

in2p3-00850508 , version 1 (07-08-2013)

Identifiers

Cite

G. Aad, S. Albrand, J. Brown, Q. Buat, B. Clement, et al.. Search for excited electrons and muons in sqrt(s)=8 TeV proton-proton collisions with the ATLAS detector. New Journal of Physics, 2013, 15, pp.093011. ⟨10.1088/1367-2630/15/9/093011⟩. ⟨in2p3-00850508⟩
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