Measurement of the WZ production cross section and limits on anomalous triple gauge couplings 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) , 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) , C. Weydert (1) , C. Biscarat (2) , E. Cogneras (2) , G. Rahal (2) , T. Beau (3) , S. Bordoni (3) , G. Calderini (3) , A. Camard (3) , P. Cavalleri (3) , E. Chareyre (3) , S. de Cecco (3) , F. Derue (3) , D. Imbault (3) , M.W. Krasny (3) , D. Lacour (3) , B. Laforge (3) , O. Le Dortz (3) , J. Lellouch , G. Marchiori (3) , I. Nikolic-Audit (3) , J. Ocariz (3) , M. Ridel (3) , L. Roos (3) , Ph. Schwemling (3) , Timothée Theveneaux-Pelzer (3) , S. Trincaz-Duvoid (3) , T.N. Trinh (3) , F. Vannucci (4) , Emmanuel Busato (5) , D. Calvet (5) , S. Calvet (5) , Reina Coromoto Camacho Toro (5) , Diane Cinca (5) , J. Donini (5) , R. Febbraro (5) , N. Ghodbane (5) , C. Guicheney (5) , H. Liao (5) , D. Pallin (5) , F. Podlyski (5) , C. Santoni (5) , L. P. Says (5) , F. Vazeille (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) , P. Ghez (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) , 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) , H. Abreu (7) , N. Andari (7) , C. Arnault (7) , E. Augé (7) , P. Barrillon (7) , M. Benoit , S. Binet (7) , J.-B. Blanchard (7) , C. Bourdarios (7) , D. Breton (7) , C. Collard (7) , C. de La Taille (7) , J.B. de Vivie de Regie (7) , Sara Diglio (7) , L. Duflot (7) , M. Escalier (7) , A.C. Falou (7) , L. Fayard (7) , D. Fournier (7) , J.-F. Grivaz (7) , M. Heller (7) , S. Henrot-Versillé (7) , J. Hrivnac (7) , L. Iconomidou-Fayard (7) , J. Idarraga (7) , M. Kado (7) , A. Lounis (7) , N. Makovec (7) , P. Matricon (7) , F. Niedercorn (7) , L. Poggioli (7) , P. Puzo (7) , A. Renaud (7) , D. Rousseau (7) , X. Ruan (7) , G. Rybkin (7) , J.B. Sauvan (7) , J. Schaarschmidt (7) , A.C. Schaffer (7) , L. Serin (7) , S. Simion (7) , R. Tanaka , J.J. Veillet (7) , I. Vukotic (7) , F. Wicek (7) , D. Zerwas (7) , Zhiqing Zhang (7) , S. Aoun (8) , S. Arfaoui (8) , C. P. Bee (8) , C. Benchouk (8) , C. Bertella (8) , N. Bousson (8) , J. C. Clémens (8) , Y. Coadou (8) , F. Djama (8) , F. Etienne (8) , L. Feligioni (8) , F. Henry-Couannier (8) , D. Hoffmann (8) , F. Hubaut (8) , E. B. F. G. Knoops (8) , E. Le Guirriec (8) , B. Li (8) , J. Maurer (8) , E. Monnier (8) , J. Odier (8) , P. Pralavorio (8) , Z. Qian (8) , A. Rozanov (8) , M. Talby (8) , N. Tannoury (8) , S. Tisserant (8) , J. Toth (8) , F. Touchard (8) , L. Vacavant (8)

1 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
2 CC-IN2P3 - Centre de Calcul de l'IN2P3
3 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
4 APC - Neutrinos
5 LPC - Laboratoire de Physique Corpusculaire - Clermont-Ferrand
6 LAPP - Laboratoire d'Annecy de Physique des Particules
7 LAL - Laboratoire de l'Accélérateur Linéaire
8 CPPM - Centre de Physique des Particules de Marseille

This Letter presents a measurement of WZ production in 1.02 fb^-1 of pp collision data at sqrt(s) = 7 TeV collected by the ATLAS experiment in 2011. Doubly leptonic decay events are selected with electrons, muons and missing transverse momentum in the final state. In total 71 candidates are observed, with a background expectation of 12.1 +/- 1.4(stat.) +4.1/-2.0(syst) events. The total cross section for WZ production for Z gamma^* masses within the range 66 GeV to 116 GeV is determined to be sigma_WZ^tot = 20.5 +3.1/-2.8(stat.) +1.4/-1.3(syst.) +0.9/-0.8(lumi.)pb, which is consistent with the Standard Model expectation of 17.3 +1.3/-0.8 pb. Limits on anomalous triple gauge boson couplings are extracted.

Domaines: Physique des Hautes Energies - Expérience [hep-ex]

G. Aad, S. Albrand, M.L. Andrieux, Q. Buat, B. Clement, et al.. Measurement of the WZ production cross section and limits on anomalous triple gauge couplings in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector. Physics Letters B, 2012, 709, pp.341-357. ⟨10.1016/j.physletb.2012.02.053⟩. ⟨in2p3-00644647⟩