Measurement of the ZZ production cross section and limits on anomalous neutral 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) , B. Clement (1) , J. Collot (1) , S. Crépé-Renaudin (1) , T. Delemontex (1) , P.A. Delsart (1) , J. Donini (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) , H. Abreu (3) , N. Andari (3) , C. Arnault (3) , E. Augé (3) , P. Barrillon (3) , M. Benoit (3) , S. Binet (3) , J.-B. Blanchard (3) , C. Bourdarios (3) , D. Breton (3) , C. Collard (3) , C. de La Taille (3) , J.B. de Vivie de Regie (3) , Sara Diglio (3) , L. Duflot (3) , M. Escalier (3) , A.C. Falou (3) , L. Fayard (3) , D. Fournier (3) , J.-F. Grivaz (3) , M. Heller (3) , S. Henrot-Versillé (3) , J. Hrivnac (3) , L. Iconomidou-Fayard (3) , J. Idarraga (3) , M. Kado (3) , A. Lounis (3) , N. Makovec (3) , P. Matricon (3) , F. Niedercorn (3) , L. Poggioli (3) , P. Puzo (3) , A. Renaud (3) , D. Rousseau (3) , X. Ruan (3) , G. Rybkin (3) , J.B. Sauvan (3) , J. Schaarschmidt (3) , A.C. Schaffer (3) , L. Serin (3) , S. Simion (3) , R. Tanaka (3) , J.J. Veillet (3) , I. Vukotic (3) , F. Wicek (3) , D. Zerwas (3) , Zhiqing Zhang (3) , Emmanuel Busato (4) , D. Calvet (4) , S. Calvet (4) , Reina Coromoto Camacho Toro (4) , Diane Cinca (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) , T. Beau (5) , S. Bordoni (5) , G. Calderini (5) , A. Camard (5) , P. Cavalleri (5) , E. Chareyre (5) , S. de Cecco (5) , F. Derue (5) , D. Imbault (5) , M.W. Krasny (5) , D. Lacour (5) , B. Laforge (5) , O. Le Dortz (5) , J. Lellouch (5) , G. Marchiori (5) , I. Nikolic-Audit (5) , J. Ocariz (5) , M. Ridel (5) , L. Roos (5) , Ph. Schwemling (5) , Timothée Theveneaux-Pelzer (5) , S. Trincaz-Duvoid (5) , T.N. Trinh (5) , F. Vannucci (5) , L. Aperio Bella (6) , B. Aubert (6) , N. Berger (6) , J. Colas (6) , L. Di Ciaccio (6) , T.K.O. Doan (6) , S. Elles (6) , P. Ghez (6) , C. Goy (6) , T. Guillemin (6) , L. Helary (6) , T. Hryn'Ova (6) , G. Ionescu (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) , H. Przysiezniak (6) , E. Richter-Was (6) , G. Sauvage (6) , E. Sauvan (6) , T. Todorov (6) , D. Tsionou (6) , I. Wingerter-Seez (6) , R. Zitoun (6) , Y. Zolnierowski (6) , S. Aoun (7) , C.P. Bee (7) , C. Benchouk (7) , N. Bousson (7) , J.C. Clémens (7) , Y. Coadou (7) , F. Djama (7) , F. Etienne (7) , L. Feligioni (7) , F. Henry-Couannier (7) , D. Hoffmann (7) , F. Hubaut (7) , E. B. F. G. Knoops (7) , E. Le Guirriec (7) , B. Li (7) , J. Maurer (7) , E. Monnier (7) , J. Odier (7) , P. Pralavorio (7) , Z. Qian (7) , A. Rozanov (7) , M. Talby (7) , N. Tannoury (7) , S. Tisserant (7) , J. Toth (7) , F. Touchard (7) , L. Vacavant (7) , S. Arfaoui (7) , E. Petit (7)

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

A measurement of the ZZ production cross section in proton-proton collisions at sqrt(s) = 7 TeV using data recorded by the ATLAS experiment at the LHC is presented. In a data sample corresponding to an integrated luminosity of 1.02 fb^-1 collected in 2011, 12 events containing two Z boson candidates decaying to electrons and/or muons are observed. The expected background contribution is 0.3 +/- 0.3 (stat) ^{+0.4}_{-0.3} (syst.) events. The cross section measured in a phase-space region with good detector acceptance and for dilepton masses within the range 66 GeV to 116 GeV is sigma_{ZZ to ll ll}^{fid} = 19^{+6}_{-5} (stat.) +/- 1 (syst.) +/- 1 (lumi.) fb. This result is then used to derive the total cross section for on-shell ZZ production, sigma_{ZZ}^{tot}= 8.5^{+2.7}_{-2.3} (stat.)^{+0.4}_{-0.3} (syst.) +/- 0.3 (lumi.) pb, which is consistent with the Standard Model expectation of 6.5^{+0.3}_{-0.2} pb calculated at the next-to-leading order in QCD. Limits on anomalous neutral triple gauge boson couplings are derived.

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

G. Aad, S. Albrand, M.L. Andrieux, B. Clement, J. Collot, et al.. Measurement of the ZZ production cross section and limits on anomalous neutral triple gauge couplings in proton-proton collisions at sqrt(s) = 7 TeV with the ATLAS detector. Physical Review Letters, 2012, 108, pp.041804. ⟨10.1103/PhysRevLett.108.041804⟩. ⟨in2p3-00635350⟩