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Measurement of ZZ production in pp collisions at sqrt(s)=7 TeV and limits on anomalous ZZZ and ZZgamma couplings with the ATLAS detector

G. Aad S. Aoun 1 C. P. Bee 1 C. Bertella 1 N. Bousson 1 J. C. Clémens 1 Y. Coadou 1 F. Djama 1 F. Etienne 1 L. Feligioni 1 D. Hoffmann 1 F. Hubaut 1 E. B. F. G. Knoops 1 E. Le Guirriec 1 B. Li 1 J. Maurer 1 E. Monnier 1 J. Odier 1 P. Pralavorio 1 A. Rozanov 1 M. Talby 1 N. Tannoury 1 E. Tiouchichine 1 S. Tisserant 1 J. Toth 1 F. Touchard 1 M. Ughetto 1 L. Vacavant 1 S. Abdel Khalek 2 H. Abreu 2 N. Andari 2 C. Arnault 2 E. Augé 2 P. Barrillon 2 M. Benoit S. Binet 2 C. Bourdarios 2 C. de la Taille 2 J.B. de Vivie de Regie 2 L. Duflot 2 M. Escalier 2 L. Fayard 2 D. Fournier 2 J.-F. Grivaz 2 S. Henrot-Versillé 2 J. Hrivnac 2 L. Iconomidou-Fayard 2 J. Idarraga 2 M. Kado 2 N. Lorenzo Martinez 2 A. Lounis 2 N. Makovec 2 P. Matricon 2 F. Niedercorn 2 L. Poggioli 2 P. Puzo 2 A. Renaud 2 D. Rousseau 2 G. Rybkin 2 J.B. Sauvan 2 J. Schaarschmidt 2 A.C. Schaffer 2 L. Serin 2 S. Simion 2 R. Tanaka 2 M. Teinturier 2 J.J. Veillet 2 I. Vukotic 2 F. Wicek 2 D. Zerwas 2 Zhiqing Zhang 2 D. Boumediene 3 Emmanuel Busato 3 D. Calvet 3 S. Calvet 3 Reina Coromoto Camacho Toro 3 Diane Cinca 4 J. Donini 3 Ph. Gris 3 N. Ghodbane 3 C. Guicheney 3 H. Liao 3 D. Pallin 3 Daniela Paredes Hernández 3 F. Podlyski 3 C. Santoni 3 F. Vazeille 3 S. Albrand 5 M.L. Andrieux 5 Q. Buat 5 B. Clement 5 J. Collot 5 S. Crépé-Renaudin 5 B. Dechenaux 5 T. Delemontex 5 P.A. Delsart 5 M.H. Genest 5 J.Y. Hostachy 5 E. Laisne 5 F. Ledroit-Guillon 5 A. Lleres 5 A. Lucotte 5 F. Malek 5 J. Stark 5 X. Sun 5 B. Trocmé 5 C. Weydert 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 T. Hryn'Ova 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 F. Vannucci 7
Abstract : 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 Large Hadron Collider is presented. In a data sample corresponding to an integrated luminosity of 4.6 fb-1 collected in 2011, events are selected that are consistent either with two Z bosons decaying to electrons or muons or with one Z boson decaying to electrons or muons and a second Z boson decaying to neutrinos. The ZZ*->llll and ZZ->llnunu cross sections are measured in restricted phase-space regions. These results are then used to derive the total cross section for ZZ events produced with both Z bosons in the mass range 66 to 116 GeV, sigmaZZtot = 6.7 +-0.7 +0.4-0.3 +-0.3 pb, which is consistent with the Standard Model prediction of 5.89+0.22-0.18 pb calculated at next-to-leading order in QCD. The normalized differential cross sections in bins of various kinematic variables are presented. Finally, the differential event yield as a function of the transverse momentum of the leading Z boson is used to set limits on anomalous neutral triple gauge boson couplings in ZZ production.
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Submitted on : Tuesday, November 27, 2012 - 9:47:15 AM
Last modification on : Wednesday, September 23, 2020 - 4:36:47 AM

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G. Aad, S. Aoun, C. P. Bee, C. Bertella, N. Bousson, et al.. Measurement of ZZ production in pp collisions at sqrt(s)=7 TeV and limits on anomalous ZZZ and ZZgamma couplings with the ATLAS detector. Journal of High Energy Physics, Springer, 2013, 3, pp.128. ⟨10.1007/JHEP03(2013)128⟩. ⟨in2p3-00757470⟩

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