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

G. Aad S. Albrand 1 M.L. Andrieux 1 Q. Buat 1 B. Clement 1 J. Collot 1 S. Crépé-Renaudin 1 T. Delemontex 1 P.A. Delsart 1 M.H. Genest 1 J.Y. Hostachy 1 E. Laisne 1 F. Ledroit-Guillon 1 A. Lleres 1 A. Lucotte 1 F. Malek 1 P. Martin 1 F. Polci 1 J. Stark 1 X. Sun 1 B. Trocmé 1 J. Wang 1 C. Weydert 1 C. Biscarat 2 E. Cogneras 2 G. Rahal 2 S. Aoun 3 S. Arfaoui 3 C. P. Bee 3 C. Benchouk 3 C. Bertella 3 N. Bousson 3 J. C. Clémens 3 Y. Coadou 3 F. Djama 3 F. Etienne 3 L. Feligioni 3 F. Henry-Couannier 3 D. Hoffmann 3 F. Hubaut 3 E.B. F. G. Knoops 3 E. Le Guirriec 3 B. Li 3 J. Maurer 3 E. Monnier 3 J. Odier 3 P. Pralavorio 3 Z. Qian 3 A. Rozanov 3 M. Talby 3 N. Tannoury 3 S. Tisserant 3 J. Toth 3 F. Touchard 3 L. Vacavant 3 D. Boumedienne 4 E. Busato 4 D. Calvet 4 S. Calvet 4 R. Camacho Toro 4 Diane Cinca 5 J. Donini 4 R. Febbraro 4 N. Ghodbane 4 C. Guicheney 4 H. Liao 4 D. Pallin 4 F. Podlyski 4 C. Santoni 4 L.-P. Says 4 F. Vazeille 4 H. Abreu 6 N. Andari 6 C. Arnault 6 E. Augé 6 P. Barrillon 6 M. Benoit 6 S. Binet 6 J.-B. Blanchard 6 C. Bourdarios 6 D. Breton 6 C. Collard C. De La Taille 6 J.B. De Vivie De Regie 6 S. Diglio 6 L. Duflot 6 M. Escalier 6 A.C. Falou 6 L. Fayard 6 D. Fournier 6 J.-F. Grivaz 6 M. Heller 6 S. Henrot-Versillé 6 J. Hrivnac 6 L. Iconomidou-Fayard 6 J. Idarraga 6 M. Kado 6 A. Lounis 6 N. Makovec 6 P. Matricon 6 F. Niedercorn 6 L. Poggioli 6 P. Puzo 6 A. Renaud 6 D. Rousseau 6 X. Ruan 6 G. Rybkin 6 J.B. Sauvan 6 J. Schaarschmidt 6 A.C. Schaffer 6 L. Serin 6 S. Simion 6 R. Tanaka 6 J.J. Veillet 6 I. Vukotic 6 F. Wicek 6 D. Zerwas 6 Z. Zhang 6 L. Aperio Bella 7 B. Aubert 7 N. Berger 7 J. Colas 7 M. Delmastro 7 L. Di Ciaccio 7 T.K.O. Doan 7 S. Elles 7 C. Goy 7 L. Helary 7 T. Hryn'Ova 7 A. Jérémie 7 S. Jézéquel 7 M. Kataoka 7 J. Labbe 7 R. Lafaye 7 J. Leveque 7 V.P. Lombardo 7 N. Massol 7 P. Perrodo 7 E. Petit 7 H. Przysiezniak 7 E. Richter-Was 7 G. Sauvage 7 E. Sauvan 7 M. Schwoerer 7 T. Todorov 7 D. Tsionou 7 I. Wingerter-Seez 7 R. Zitoun 7 Y. Zolnierowski 7
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.
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Submitted on : Tuesday, January 17, 2012 - 8:00:24 AM
Last modification on : Tuesday, January 17, 2012 - 8:00:24 AM

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G. Aad, S. Albrand, M.L. Andrieux, Q. Buat, B. Clement, et al.. Search for excited leptons in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector. Physical Review D, American Physical Society, 2012, 85, pp.072003. <10.1103/PhysRevD.85.072003>. <in2p3-00660545>

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