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Measurement of the W charge asymmetry in the W→μν decay mode in pp 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 P. de Saintignon 1 P.A. Delsart 1 J. Donini 1 D. 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 H. Bachacou 2 F. Bauer 2 N. Besson 2 M. Boonekamp 2 L. Chevalier 2 J. Ernwein 2 I. Etienvre 2 A. Formica 2 L. Gauthier 2 F. Giraud 2 C. Guyot 2 S. Hassani 2 W. Kozanecki 2 E. Lancon 2 F. Laporte 2 E. Le Meneudeu 2 M. Legendre 2 B. Lenzi 2 B. Mansoulie 2 P. Meyer 2 N. Morange 2 R. Nicolaidou 2 A. Ouraou 2 N. Pomarede 2 B. Resende 2 R. Royon 2 P. Schune 2 J. Schwindling 2 O. Simard 2 M. Virchaux 2 C. Biscarat 3 E. Cogneras 3 G. Rahal 3 Emmanuel Busato 4 D. Calvet 4 S. Calvet 4 Reina Coromoto Camacho Toro 4 Diane Cinca 5 R. Febbraro 4 N. Ghodbane 4 C. Guicheney 4 D. Pallin 4 F. Podlyski 4 C. Santoni 4 L. P. Says 4 F. Vazeille 4 S. Viret 4 P.L.Y. Gris 4 L. Aperio-Bella 6 B. Aubert 6 N. Berger 6 J. Colas 6 L. Di Ciaccio 6 T.K.O. Doan 6 M. El Kacimi 6 S. Elles 6 P. Ghez 6 M. Gouanere 6 C. Goy 6 T. Guillemin 6 L. Helary 6 T. Hryn'Ova 6 P. Iengo 6 G. Ionescu 6 A. Jeremie 6 S. Jézéquel 6 M. Kataoka 6 J. Labbe 6 Jérémy Lévêque 6 R. Lafaye 6 N. Massol 6 P. Perrodo 6 H. Przysiezniak 6 G. Sauvage 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 K. Bernardet 7 N. Bousson 7 J.C. Clemens 7 Y. Coadou 7 P. Delpierre 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 E. Monnier 7 J. Odier 7 E. Petit 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 H. Abreu 8 C. Arnault 8 E. Augé 8 P. Barrillon 8 M. Benoit 8 S. Binet 8 J.-B. Blanchard 8 C. Bourdarios 8 D. Breton 8 C. Collard 8 C. de la Taille 8 J.B. de Vivie de Regie 8 S. Diglio 8 F. Dudziak 8 L. Duflot 8 M. Escalier 8 A.C. Falou 8 L. Fayard 8 D. Fournier 8 J.-F. Grivaz 8 M. Heller 8 S. Henrot-Versillé 8 J. Hrivnac 8 L. Iconomidou-Fayard 8 J. Idarraga 8 M. Kado 8 A. Lounis 8 N. Makovec 8 P. Matricon 8 Y. Nakahama 8 F. Niedercorn 8 L. Poggioli 8 P. Puzo 8 A. Renaud 8 D. Rousseau 8 X. Ruan 8 G. Rybkin 8 J.B. Sauvan 8 J. Schaarschmidt 8 A.C. Schaffer 8 L. Serin 8 S. Simion 8 R. Tanaka 8 D. Varouchas 8 J.J. Veillet 8 I. Vukotic 8 F. Wicek 8 D. Zerwas 8 Zhiqing Zhang 8 T. Beau 9 S. Bordoni 9 G. Calderini 9 A. Camard 9 P. Cavalleri 9 E. Chareyre 9 S. de Cecco 9 F. Derue 9 D. Imbault 9 M.W. Krasny 9 D. Lacour 9 B. Laforge 9 O. Le Dortz 9 J. Lellouch 9 G. Marchiori 9 I. Nikolic-Audit 9 J. Ocariz 9 M. Ridel 9 L. Roos 9 Ph. Schwemling 9 Timothée Theveneaux-Pelzer 9 S. Trincaz-Duvoid 9 T.N. Trinh 9 F. Vannucci 10
Abstract : This Letter reports a measurement of the muon charge asymmetry from W bosons produced in proton-proton collisions at a centre-of-mass energy of 7 TeV with the ATLAS experiment at the LHC. The asymmetry is measured in the W→μν decay mode as a function of the muon pseudorapidity using a data sample corresponding to a total integrated luminosity of 31 pb−1. The results are compared to predictions based on next-to-leading order calculations with various parton distribution functions. This measurement provides information on the u and d quark momentum fractions in the proton.
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Submitted on : Wednesday, March 16, 2011 - 8:40:12 AM
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G. Aad, S. Albrand, M.L. Andrieux, B. Clement, J. Collot, et al.. Measurement of the W charge asymmetry in the W→μν decay mode in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector. Physics Letters B, Elsevier, 2011, 701, pp.31-49. ⟨10.1016/j.physletb.2011.05.024⟩. ⟨in2p3-00577025⟩

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