Measurement of the cross-section for b-jets produced in association with a Z boson at sqrt(s)=7 TeV with the ATLAS detector - IN2P3 - Institut national de physique nucléaire et de physique des particules
Article Dans Une Revue Physics Letters B Année : 2012

Measurement of the cross-section for b-jets produced in association with a Z boson at sqrt(s)=7 TeV with the ATLAS detector

G. Aad , T. Beau (1) , S. Bordoni (1) , G. Calderini (1) , A. Camard (1) , P. Cavalleri (1) , E. Chareyre (1) , S. de Cecco (1) , F. Derue (1) , D. Imbault (1) , M.W. Krasny (1) , D. Lacour (1) , B. Laforge (1) , O. Le Dortz (1) , J. Lellouch (1) , G. Marchiori (1) , I. Nikolic-Audit (1) , J. Ocariz (1) , M. Ridel (1) , L. Roos (1) , Ph. Schwemling (1) , Timothée Theveneaux-Pelzer (1) , S. Trincaz-Duvoid (1) , T.N. Trinh (1) , F. Vannucci (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) , P.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. Mansoulie (3) , J.-P. Meyer (3) , N. Morange (3) , E. Mountricha (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. Biscarat (4) , E. Cogneras (4) , G. Rahal (4) , Emmanuel Busato (5) , D. Calvet (5) , S. Calvet (5) , Reina Coromoto Camacho Toro (5) , Diane Cinca (5) , R. Febbraro (5) , N. Ghodbane (5) , C. Guicheney (5) , H. Liao (5) , D. Pallin (5) , F. Podlyski (5) , C. Santoni (5) , L. P. Says (5) , F. Vazeille (5) , S. Albrand (6) , M.L. Andrieux (6) , B. Clement (6) , J. Collot (6) , S. Crépé-Renaudin (6) , P.A. Delsart (6) , J. Donini (6) , J.Y. Hostachy (6) , E. Laisne (6) , F. Ledroit-Guillon (6) , A. Lleres (6) , A. Lucotte (6) , F. Malek (6) , P. Martin (6) , F. Polci (6) , J. Stark (6) , X. Sun (6) , B. Trocmé (6) , C. Weydert (6) , L. Aperio Bella (7) , B. Aubert (7) , N. Berger (7) , J. Colas (7) , L. Di Ciaccio (7) , T.K.O. Doan (7) , S. Elles (7) , P. Ghez (7) , M. Gouanère (7) , C. Goy (7) , T. Guillemin (7) , L. Helary (7) , T. Hryn'Ova (7) , G. Ionescu (7) , A. Jérémie (7) , S. Jézéquel (7) , M. Kataoka (7) , J. Labbe (7) , R. Lafaye (7) , J. Leveque (7) , N. Massol (7) , P. Perrodo (7) , H. Przysiezniak (7) , G. Sauvage (7) , E. Sauvan (7) , T. Todorov (7) , D. Tsionou (7) , I. Wingerter-Seez (7) , R. Zitoun (7) , Y. Zolnierowski (7) , S. Aoun (8) , C. P. Bee (8) , C. Benchouk (8) , K. Bernardet (8) , N. Bousson (8) , J. C. Clémens (8) , Y. Coadou (8) , P. Delpierre (8) , F. Djama (8) , F. Etienne (8) , L. Feligioni (8) , F. Henry-Couannier (8) , D. Hoffmann (8) , F. Hubaut (8) , E. B. F. G. Knoops (8) , E. Le Guirriec (8) , B. Li (8) , E. Monnier (8) , J. Odier (8) , E. Petit (8) , P. Pralavorio (8) , Z. Qian (8) , A. Rozanov (8) , M. Talby (8) , N. Tannoury (8) , S. Tisserant (8) , J. Toth (8) , F. Touchard (8) , L. Vacavant (8) , H. Abreu (9) , N. Andari (9) , C. Arnault (9) , E. Augé (9) , P. Barrillon (9) , M. Benoit (9) , S. Binet (9) , J.-B. Blanchard (9) , C. Bourdarios (9) , D. Breton (9) , C. Collard (10) , C. de La Taille (9) , J.B. de Vivie de Regie (9) , Sara Diglio (9) , L. Duflot (9) , M. Escalier (9) , A.C. Falou (9) , L. Fayard (9) , D. Fournier (9) , J.-F. Grivaz (9) , M. Heller (9) , S. Henrot-Versillé (9) , J. Hrivnac (9) , L. Iconomidou-Fayard (9) , J. Idarraga (9) , M. Kado (9) , A. Lounis (9) , N. Makovec (9) , P. Matricon (9) , F. Niedercorn (9) , L. Poggioli (9) , P. Puzo (9) , A. Renaud (9) , D. Rousseau (9) , X. Ruan (9, 11) , G. Rybkin (9) , J.B. Sauvan (9) , J. Schaarschmidt (9) , A.C. Schaffer (9) , L. Serin (9) , S. Simion (9) , R. Tanaka (9) , J.J. Veillet (9) , I. Vukotic (9) , F. Wicek (9) , D. Zerwas (9) , Zhiqing Zhang (9)
G. Aad
F. Vannucci
  • Fonction : Auteur
E. Cogneras
N. Berger
C. Goy
T. Hryn'Ova
Y. Coadou
J. Odier
  • Fonction : Auteur
  • PersonId : 1433897
E. Augé
C. Collard
Sara Diglio
D. Rousseau
Zhiqing Zhang
  • Fonction : Auteur
  • PersonId : 829631

Résumé

A measurement is presented of the cross-section for b-jet production in association with a Z boson in pp collisions at a centre-of-mass energy of sqrt(s)=7 TeV. The analysis uses the data sample collected by the ATLAS experiment in 2010, corresponding to an integrated luminosity of approximately 36 pb^-1. The event selection requires a Z boson decaying into high pt electrons or muons, and a b-jet, identified by its displaced vertex, with transverse momentum pt>25 GeV and rapidity |y|<2.1. After subtraction of backgrounds, the yield is extracted from the vertex mass distribution of the candidate b-jets. The ratio of this cross-section to the inclusive Z cross-section (the average number of b-jets per Z event) is also measured. Both results are found to be in good agreement with perturbative QCD predictions at next-to-leading order.

Dates et versions

in2p3-00620626 , version 1 (08-09-2011)

Identifiants

Citer

G. Aad, T. Beau, S. Bordoni, G. Calderini, A. Camard, et al.. Measurement of the cross-section for b-jets produced in association with a Z boson at sqrt(s)=7 TeV with the ATLAS detector. Physics Letters B, 2012, 706, pp.295-313. ⟨10.1016/j.physletb.2011.11.059⟩. ⟨in2p3-00620626⟩
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