Search for same-sign top-quark production and fourth-generation down-type quarks in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector - Université Clermont Auvergne Accéder directement au contenu
Article Dans Une Revue Journal of High Energy Physics Année : 2012

Search for same-sign top-quark production and fourth-generation down-type quarks in pp 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) , D. Boumediene (3) , Emmanuel Busato (3) , D. Calvet (3) , S. Calvet (3) , Reina Coromoto Camacho Toro (3) , Diane Cinca (3) , J. Donini (3) , R. Febbraro (3) , N. Ghodbane (3) , C. Guicheney (3) , H. Liao (3) , D. Pallin (3) , F. Podlyski (3) , C. Santoni (3) , L. P. Says (3) , F. Vazeille (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. Collard (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. Benchouk (5) , C. Bertella (5) , N. Bousson (5) , J. C. Clémens (5) , Y. Coadou (5) , F. Djama (5) , F. Etienne (5) , L. Feligioni (5) , F. Henry-Couannier (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) , L. Aperio Bella (6) , B. Aubert (6) , N. Berger (6) , J. Colas (6) , M. Delmastro (6) , L. Di Ciaccio (6) , T.K.O. Doan (6) , S. Elles (6) , C. Goy (6) , L. Helary (6) , T. Hryn'Ova (6) , A. Jérémie (6) , S. Jézéquel (6) , M. Kataoka (6) , J. Labbe (6) , R. Lafaye (6) , J. Leveque (6) , V.P. Lombardo (6) , N. Massol (6) , P. Perrodo (6) , E. Petit (6) , H. Przysiezniak (6) , E. Richter-Was (6) , G. Sauvage (6) , E. Sauvan (6) , M. Schwoerer (6) , T. Todorov (6) , D. Tsionou (6) , I. Wingerter-Seez (6) , R. Zitoun (6) , Y. Zolnierowski (6)
G. Aad
E. Cogneras
S. Calvet
E. Augé
C. Collard
D. Rousseau
Zhiqing Zhang
  • Fonction : Auteur
  • PersonId : 829631
Y. Coadou
N. Berger
C. Goy
T. Hryn'Ova

Résumé

A search is presented for same-sign top-quark production and down-type heavy quarks of charge -1/3 in events with two isolated leptons (electrons or muons) that have the same electric charge, at least two jets and large missing transverse momentum. The data are selected from pp collisions at sqrt(s)=7 TeV recorded by the ATLAS detector and correspond to an integrated luminosity of 1.04 inverse femtobarns. The observed data are consistent with expectations from Standard Model processes. Upper limits are set at 95% confidence level on the cross section of new sources of same-sign top-quark pair production of 1.4-2.0 pb depending on the assumed mediator mass. Upper limits are also set on the pair-production cross-section for new heavy down-type quarks; a lower limit of 450 GeV is set at 95% confidence level on the mass of heavy down-type quarks under the assumption that they decay 100% of the time to Wt.

Dates et versions

in2p3-00674283 , version 1 (27-02-2012)

Identifiants

Citer

G. Aad, S. Albrand, M.L. Andrieux, Q. Buat, B. Clement, et al.. Search for same-sign top-quark production and fourth-generation down-type quarks in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector. Journal of High Energy Physics, 2012, 4, pp.69. ⟨10.1007/JHEP04(2012)069⟩. ⟨in2p3-00674283⟩
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