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Article Dans Une Revue European Physical Journal C: Particles and Fields Année : 2011

Measurement of the inclusive and dijet cross-sections of b-jets 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.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. Bachacou (3) , H. Abreu (4) , N. Andari (4) , C. Arnault (4) , E. Augé (4) , P. Barrillon (4) , M. Benoit (4) , S. Binet (4) , J.-B. Blanchard (4) , C. Bourdarios (4) , D. Breton (4) , C. Collard (4) , C. de La Taille (4) , J.B. de Vivie de Regie (4) , Sara Diglio (4) , L. Duflot (4) , M. Escalier (4) , A.C. Falou (4) , L. Fayard (4) , D. Fournier (4) , J.-F. Grivaz (4) , M. Heller (4) , S. Henrot-Versillé (4) , J. Hrivnac (4) , L. Iconomidou-Fayard (4) , J. Idarraga (4) , M. Kado (4) , A. Lounis (4) , N. Makovec (4) , P. Matricon (4) , F. Niedercorn (4) , L. Poggioli (4) , P. Puzo (4) , A. Renaud (4) , D. Rousseau (4) , X. Ruan (4) , G. Rybkin (4) , J.B. Sauvan (4) , J. Schaarschmidt (4) , A.C. Schaffer (4) , L. Serin (4) , S. Simion (4) , R. Tanaka (4) , J.J. Veillet (4) , I. Vukotic (4) , F. Wicek (4) , D. Zerwas (4) , Zhiqing Zhang (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 (6) , Emmanuel Busato (7) , D. Calvet (7) , S. Calvet (7) , Reina Coromoto Camacho Toro (7) , Diane Cinca (8) , R. Febbraro (7) , N. Ghodbane (7) , C. Guicheney (7) , H. Liao (7) , D. Pallin (7) , F. Podlyski (7) , C. Santoni (7) , L. P. Says (7) , F. Vazeille (7) , L. Aperio Bella (9) , B. Aubert (9) , N. Berger (9) , J. Colas (9) , L. Di Ciaccio (9) , T.K.O. Doan (9) , S. Elles (9) , P. Ghez (9) , C. Goy (9) , T. Guillemin (9) , L. Helary (9) , T. Hryn'Ova (9) , G. Ionescu (9) , A. Jérémie (9) , S. Jézéquel (9) , M. Kataoka (9) , J. Labbe (9) , R. Lafaye (9) , J. Leveque (9) , V.P. Lombardo (9) , N. Massol (9) , P. Perrodo (9) , H. Przysiezniak (9) , E. Richter-Was (9) , G. Sauvage (9) , E. Sauvan (9) , T. Todorov (9) , D. Tsionou (9) , I. Wingerter-Seez (9) , R. Zitoun (9) , Y. Zolnierowski (9) , S. Aoun (10) , C. P. Bee (10) , C. Benchouk (10) , K. Bernardet (10) , N. Bousson (10) , J. C. Clémens (10) , Y. Coadou (10) , P. Delpierre (10) , F. Djama (10) , F. Etienne (10) , L. Feligioni (10) , F. Henry-Couannier (10) , D. Hoffmann (10) , F. Hubaut (10) , E. B. F. G. Knoops (10) , E. Le Guirriec (10) , B. Li (10) , J. Maurer (10) , E. Monnier (10) , J. Odier (10) , E. Petit (10) , P. Pralavorio (10) , Z. Qian (10) , A. Rozanov (10) , M. Talby (10) , N. Tannoury (10) , S. Tisserant (10) , J. Toth (10) , F. Touchard (10) , L. Vacavant (10)
G. Aad
E. Cogneras
E. Augé
C. Collard
Sara Diglio
D. Rousseau
Zhiqing Zhang
  • Fonction : Auteur
  • PersonId : 829631
F. Vannucci
  • Fonction : Auteur
S. Calvet
Diane Cinca
N. Berger
C. Goy
T. Hryn'Ova
Y. Coadou

Résumé

The inclusive and dijet production cross-sections have been measured for jets containing b-hadrons (b-jets) in proton-proton collisions at a centre-of-mass energy of sqrt(s) = 7 TeV, using the ATLAS detector at the LHC. The measurements use data corresponding to an integrated luminosity of 34 pb^-1. The b-jets are identified using either a lifetime-based method, where secondary decay vertices of b-hadrons in jets are reconstructed using information from the tracking detectors, or a muon-based method where the presence of a muon is used to identify semileptonic decays of b-hadrons inside jets. The inclusive b-jet cross-section is measured as a function of transverse momentum in the range 20 < pT < 400 GeV and rapidity in the range |y| < 2.1. The bbbar-dijet cross-section is measured as a function of the dijet invariant mass in the range 110 < m_jj < 760 GeV, the azimuthal angle difference between the two jets and the angular variable chi in two dijet mass regions. The results are compared with next-to-leading-order QCD predictions. Good agreement is observed between the measured cross-sections and the predictions obtained using POWHEG + Pythia. MC@NLO + Herwig shows good agreement with the measured bbbar-dijet cross-section. However, it does not reproduce the measured inclusive cross-section well, particularly for central b-jets with large transverse momenta.

Dates et versions

in2p3-00636229 , version 1 (27-10-2011)

Identifiants

Citer

G. Aad, S. Albrand, M.L. Andrieux, B. Clement, J. Collot, et al.. Measurement of the inclusive and dijet cross-sections of b-jets in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector. European Physical Journal C: Particles and Fields, 2011, 71, pp.1846. ⟨10.1140/epjc/s10052-011-1846-4⟩. ⟨in2p3-00636229⟩
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