Skip to Main content Skip to Navigation
Journal articles

A search for ttbar resonances with the ATLAS detector in 2.05 fb^-1 of proton-proton collisions at sqrt(s) = 7 TeV

G. Aad S. Albrand 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 F. Ledroit-Guillon 1 A. Lleres 1 A. Lucotte 1 F. Malek 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 L. Aperio Bella 3 B. Aubert 3 N. Berger 3 J. Colas 3 M. Delmastro 3 L. Di Ciaccio 3 T.K.O. Doan 3 S. Elles 3 C. Goy 3 L. Helary 3 T. Hryn'Ova 3 A. Jérémie 3 S. Jézéquel 3 M. Kataoka 3 J. Labbe 3 R. Lafaye 3 J. Leveque 3 V.P. Lombardo 3 N. Massol 3 P. Perrodo 3 E. Petit 3 H. Przysiezniak 3 E. Richter-Was 3 G. Sauvage 3 E. Sauvan 3 M. Schwoerer 3 T. Todorov 3 D. Tsionou 3 I. Wingerter-Seez 3 R. Zitoun 3 Y. Zolnierowski 3 S. Abdel Khalek 4 H. Abreu 4 N. Andari 4 C. Arnault 4 E. Augé 4 P. Barrillon 4 M. Benoit 4 S. Binet 4 C. Bourdarios 4 C. de la Taille 4 J.B. de Vivie de Regie 4 L. Duflot 4 M. Escalier 4 L. Fayard 4 D. Fournier 4 J.-F. Grivaz 4 S. Henrot-Versillé 4 J. Hrivnac 4 L. Iconomidou-Fayard 4 J. Idarraga 4 M. Kado 4 N. Lorenzo Martinez 4 A. Lounis 4 N. Makovec 4 P. Matricon 4 F. Niedercorn 4 L. Poggioli 4 P. Puzo 4 A. Renaud 4 D. Rousseau 4 G. Rybkin 4 J.B. Sauvan 4 J. Schaarschmidt 4 A.C. Schaffer 4 E. Scifo 4 L. Serin 4 S. Simion 4 R. Tanaka 4 M. Teinturier 4 J.J. Veillet 4 I. Vukotic 4 F. Wicek 4 D. Zerwas 4 Zhiqing Zhang 4 S. Aoun 5 C. P. Bee 5 C. Bertella 5 N. Bousson 5 J. C. Clémens 5 Y. Coadou 5 F. Djama 5 F. Etienne 5 L. Feligioni 5 D. Hoffmann 5 F. Hubaut 5 E. B. F. G. Knoops 5 E. Le Guirriec 5 B. Li 5 J. Maurer 5 E. Monnier 5 J. Odier 5 P. Pralavorio 5 Z. Qian 5 A. Rozanov 5 M. Talby 5 N. Tannoury 5 S. Tisserant 5 J. Toth 5 F. Touchard 5 L. Vacavant 5 D. Boumediene 6 Emmanuel Busato 6 D. Calvet 6 S. Calvet 6 Reina Coromoto Camacho Toro 6 Diane Cinca 7 J. Donini 6 R. Febbraro 6 N. Ghodbane 6 C. Guicheney 6 H. Liao 6 D. Pallin 6 Daniela Paredes Hernández 6 F. Podlyski 6 C. Santoni 6 F. Vazeille 6
Abstract : A search for top quark pair resonances in final states containing at least one electron or muon has been performed with the ATLAS experiment at the CERN Large Hadron Collider. The search uses a data sample corresponding to an integrated luminosity of 2.05 fb^-1, which was recorded in 2011 at a proton-proton centre-of-mass energy of 7 TeV. No evidence for a resonance is found and limits are set on the production cross-section times branching ratio to ttbar for narrow and wide resonances. For narrow Z' bosons, the observed 95% credibility level limits range from 9.3 pb to 0.95 pb for masses in the range of m_Z' = 500 GeV to m_Z' = 1300 GeV. The corresponding excluded mass region for a leptophobic topcolour Z' boson (Kaluza-Klein gluon excitation in the Randall-Sundrum model) is m_Z' < 880 GeV (m_{g_KK} < 1130 GeV).
Document type :
Journal articles
Complete list of metadatas

http://hal.in2p3.fr/in2p3-00701288
Contributor : Emmanuelle Vernay <>
Submitted on : Friday, May 25, 2012 - 9:19:20 AM
Last modification on : Wednesday, September 16, 2020 - 4:11:34 PM

Links full text

Identifiers

Citation

G. Aad, S. Albrand, Q. Buat, B. Clement, J. Collot, et al.. A search for ttbar resonances with the ATLAS detector in 2.05 fb^-1 of proton-proton collisions at sqrt(s) = 7 TeV. European Physical Journal C: Particles and Fields, Springer Verlag (Germany), 2012, 72, pp.2083. ⟨10.1140/epjc/s10052-012-2083-1⟩. ⟨in2p3-00701288⟩

Share

Metrics

Record views

490