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Measurement of the W+W- cross section in sqrt(s) = 7 TeV pp collisions with ATLAS

G. Aad S. Albrand 1 M.L. Andrieux 1 B. Clement 1 J. Collot 1 S. Crépé-Renaudin 1 P. de Saintignon 1 P.A. Delsart 1 J. Donini 1 Daniel Dzahini 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. Biscarat 2 E. Cogneras 2 G. Rahal 2 H. Bachacou 3 F. Bauer 3 N. Besson 3 N.M. Bolnet 3 M. Boonekamp 3 L. Chevalier 3 J. Ernwein 3 A.I. Etienvre 3 A. Formica 3 L. Gauthier 3 F. Giraud 3 C. Guyot 3 S. Hassani 3 W. Kozanecki 3 E. Lancon 3 J.F. Laporte 3 E. Le Menedeu 3 M. Legendre 3 B. Lenzi 3 B. Mansoulie 3 J.-P. Meyer 3 N. Morange 3 R. Nicolaidou 3 A. Ouraou 3 D.M. Pomarede 3 B. Resende 3 C.R. Royon 3 Ph. Schune 3 J. Schwindling 3 O. Simard 3 M. Virchaux 3 C. Xu 3 J. Yu 3 S. Aoun 4 C. Bee 4 C. Benchouk 4 K. Bernardet 4 N. Boussons 4 J. C. Clèmens 4 Y. Coadou 4 P. Delpierre 4 F. Djama 4 F. Etienne 4 L. Feligioni 4 F. Henry- Couannier 4 D. Hoffmann 4 F. Hubaut 4 E. B. F. G. Knoops 4 E. Le Guirriec 4 B. Li 4 E. Monnier 4 J. Odier 4 E. Petit 4 P. Pralavorio 4 Z. Qian 4 A. Rozanov 4 M. Talby 4 N. Tannoury 4 S. Tisserant 4 J. Toth 4 F. Touchard 4 L. Vacavant 4 Emmanuel Busato 5 D. Calvet 5 S. Calvet 5 Reina Coromoto Camacho Toro 5 Diane Cinca 6 R. Febbraro 5 P.L.Y. Gris 5 N. Ghodbane 5 C. Guicheney 5 D. Pallin 5 F. Podlyski 5 C. Santoni 5 L. P. Says 5 F. Vazeille 5 S. Viret 5 H. Abreu 7 C. Arnault 7 E. Augé 7 P. Barrillon 7 M. Benoit 7 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 S. Diglio 7 F. Dudziak 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 Y. Nakahama 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 7 D. Varouchas 7 J.J. Veillet 7 I. Vukotic 7 F. Wicek 7 D. Zerwas 7 Zhiqing Zhang 7 T. Beau 8 S. Bordoni 8 G. Calderini 8 A. Camard 8 P. Cavalleri 8 E. Chareyre 8 S. de Cecco 8 F. Derue 8 D. Imbault 8 M.W. Krasny 8 D. Lacour 8 B. Laforge 8 O. Le Dortz 8 J. Lellouch 8 G. Marchiori 8 I. Nikolic-Audit 8 J. Ocariz 8 M. Ridel 8 L. Roos 8 Ph. Schwemling 8 Timothée Theveneaux-Pelzer 8 S. Trincaz-Duvoid 8 T.N. Trinh 8 F. Vannucci 9 L. Aperio-Bella 10 B. Aubert 10 M. Aurousseau 10 N. Berger 10 J. Colas 10 L. Di Ciaccio 10 T.K.O. Doan 10 M. El Kacimi 10 S. Elles 10 P. Ghez 10 M. Gouanère 10 C. Goy 10 T. Guillemin 7 L. Helary 10 T. Hryn'Ova 10 P. Iengo 10 G. Ionescu 10 A. Jérémie 10 S. Jézéquel 10 M. Kataoka 10 J. Labbe 10 R. Lafaye 10 Jérémy Lévêque 10 N. Massol 10 P. Perrodo 10 H. Przysiezniak 10 G. Sauvage 10 T. Todorov 10 D. Tsionou 10 I. Wingerter-Seez 10 R. Zitoun 10 Y. Zolnierowski 10 M. Kuna 8 S. Laplace 8, 10
Abstract : This Letter presents a measurement of the $\WW$ production cross section in $\sqrt{s} = 7 \TeV\ pp$ collisions by the ATLAS experiment, using 34 $\pbi$ of integrated luminosity produced by the Large Hadron Collider at CERN. Selecting events with two isolated leptons, each either an electron or a muon, 8 candidate events are observed with an expected background of $1.7\pm0.6$ events. The measured cross section is $41^{+20}_{-16}(\mathrm{stat.})\pm 5(\mathrm{syst.})\pm 1(\mathrm{lumi.})$ pb, which is consistent with the standard model prediction of $44 \pm 3$ pb calculated at next-to-leading order in QCD.
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Submitted on : Thursday, April 28, 2011 - 10:36:16 AM
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G. Aad, S. Albrand, M.L. Andrieux, B. Clement, J. Collot, et al.. Measurement of the W+W- cross section in sqrt(s) = 7 TeV pp collisions with ATLAS. Physical Review Letters, American Physical Society, 2011, 107, pp.041802. ⟨10.1103/PhysRevLett.107.041802⟩. ⟨in2p3-00589233⟩

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