Measurement of WZ production 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) , 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) , J. Stark (1) , X. Sun (1) , B. Trocmé (1) , J. Wang (1) , C. Weydert (1) , C. Biscarat (2) , E. Cogneras (2) , G. Rahal (2) , F. Vannucci (3) , S. Aoun (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) , J. Odier (4) , P. Pralavorio (4) , A. Rozanov (4) , M. Talby (4) , N. Tannoury (4) , S. Tisserant (4) , J. Toth (4) , F. Touchard (4) , L. Vacavant (4) , L. Aperio Bella (5) , B. Aubert (5) , 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) , M. Kataoka (5) , J. Labbe (5) , R. Lafaye (5) , J. Leveque (5) , V.P. Lombardo (5) , N. Massol (5) , P. Perrodo (5) , E. Petit (5) , H. Przysiezniak (5) , E. Richter-Was (5) , G. Sauvage (5) , E. Sauvan (5) , M. Schwoerer (5) , T. Todorov (5) , D. Tsionou (5) , I. Wingerter-Seez (5) , R. Zitoun (5) , D. Boumediene (6) , Emmanuel Busato (6) , D. Calvet (6) , S. Calvet (6) , Reina Coromoto Camacho Toro (6) , Diane Cinca (6) , J. Donini (6) , R. Febbraro (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) , F. Vazeille (6) , S. Abdel Khalek (7) , H. Abreu (7) , N. Andari (7) , C. Arnault (7) , E. Augé (7) , P. Barrillon (7) , M. Benoit (7) , S. Binet (7) , C. Bourdarios (7) , C. de La Taille (7) , J.B. de Vivie de Regie (7) , L. Duflot (7) , M. Escalier (7) , L. Fayard (7) , D. Fournier (7) , J.-F. Grivaz (7) , S. Henrot-Versillé (7) , J. Hrivnac (7) , L. Iconomidou-Fayard (7) , J. Idarraga (7) , M. Kado (7) , N. Lorenzo Martinez (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) , G. Rybkin (7) , J.B. Sauvan (7) , J. Schaarschmidt (7) , A.C. Schaffer (7) , L. Serin (7) , S. Simion (7) , R. Tanaka (7) , M. Teinturier (7) , J.J. Veillet (7) , I. Vukotic (7) , F. Wicek (7) , D. Zerwas (7)

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

A study of WZ production in proton-proton collisions at sqrt(s) = 7 TeV is presented using data corresponding to an integrated luminosity of 4.6 fb^-1 collected with the ATLAS detector at the Large Hadron Collider in 2011. In total, 317 candidates, with a background expectation of 68+/-10 events, are observed in double-leptonic decay final states with electrons, muons and missing transverse momentum. The total cross-section is determined to be sigma_WZ(tot) = 19.0+1.4/-1.3(stat.)+/-0.9(cyst.)+/-0.4(lump.) pb, consistent with the Standard Model expectation of 17.6+1.1/-1.0 pb. Limits on anomalous triple gauge boson couplings are derived using the transverse momentum spectrum of Z bosons in the selected events. The cross-section is also presented as a function of Z boson transverse momentum and diboson invariant mass.

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

G. Aad, S. Albrand, M.L. Andrieux, Q. Buat, B. Clement, et al.. Measurement of WZ production in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector. European Physical Journal C: Particles and Fields, 2012, 72, pp.2173. ⟨10.1140/epjc/s10052-012-2173-0⟩. ⟨in2p3-00723194⟩