Measurement of the inclusive isolated prompt photon cross section in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector

G. Aad , B. Aubert (1) , M. Aurousseau (1) , N. Berger (1) , J. Colas (1) , L. Di Ciaccio (1) , M. El Kacimi (1) , S. Elles (1) , P. Ghez (1) , M. Gouanère (1) , C. Goy (1) , T. Guillemin (1) , L. Helary (1) , T. Hryn'Ova (1) , P. Iengo (1) , G. Ionescu (1) , A. Jérémie (1) , S. Jézéquel (1) , J. Labbe (1) , R. Lafaye (1) , N. Massol (1) , P. Perrodo (1) , H. Przysiezniak (1) , G. Sauvage (1) , T. Todorov (1) , D. Tsionou (1) , I. Wingerter-Seez (1) , R. Zitoun (1) , Y. Zolnierowski (1) , C. Biscarat (2) , E. Cogneras (2) , G. Rahal (2) , H. Bachacou (3) , F. Bauer (3) , N. Besson (3) , M. Boonekamp (3) , L. Chevalier (3) , F. Chevallier (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) , M. Virchaux (3) , T. Beau (4) , S. Bordoni (4) , G. Calderini (4) , A. Camard (4) , P. Cavalleri (4) , E. Chareyre (4) , S. de Cecco (4) , F. Derue (4) , D. Imbault (4) , M.W. Krasny (4) , D. Lacour (4) , B. Laforge (4) , O. Le Dortz (4) , J. Lellouch (4) , G. Marchiori (4) , I. Nikolic-Audit (4) , J. Ocariz (4) , M. Ridel (4) , L. Roos (4) , Ph. Schwemling (4) , Timothée Theveneaux-Pelzer (4) , S. Trincaz-Duvoid (4) , T.N. Trinh (4) , F. Vannucci (5) , S. Albrand (6) , M.L. Andrieux (6) , M. Belhorma (6) , B. Clement (6) , J. Collot (6) , S. Crépé-Renaudin (6) , P. de Saintignon (6) , P.A. Delsart (6) , J. Donini (6) , Daniel Dzahini (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) , S. Aoun (7) , C. Bee (7) , C. Benchouk (7) , K. Bernardet (7) , N. Bousson (7) , C. Cerna (7) , J. C. Clèmens (7) , Y. Coadou (7) , S. Correard (7) , P. Delpierre (7) , F. Djama (7) , F. Etienne (7) , L. Feligioni (7) , F. Henry-Couannier (7) , D. Hoffmann (7) , F. Hubaut (7) , M. Kuna (7) , E. Le Guirriec (7) , Jérémy Lévêque (7) , B. Li (7) , E. Monnier (7) , J. Odier (7) , E. Petit (7) , P. Pralavario , Z. Qian (7) , A. Rozanov (7) , V. Tisserant , J. Toth (7) , L. Vacavant (7) , H. Abreu (8) , N. Andari (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 (9) , C. de La Taille (8) , J.B. de Vivie de Regie (8) , Sara Diglio (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) , F. Niedercorn (8) , L. Poggioli (8) , P. Puzo (8) , A. Renaud (8) , D. Rousseau (8) , X. Ruan (8, 10) , G. Rybkin (8) , J.B. Sauvan (8) , J. Schaarschmidt (8) , A.C. Schaffer (8) , L. Serin (8) , S. Simion (8) , R. Tanaka (8) , J.J. Veillet (8) , I. Vukotic (8) , F. Wicek (8) , D. Zerwas (8) , Zhiqing Zhang (8)

1 LAPP - Laboratoire d'Annecy de Physique des Particules
2 CC-IN2P3 - Centre de Calcul de l'IN2P3
3 IRFU - Institut de Recherches sur les lois Fondamentales de l'Univers
4 LPNHE - Laboratoire de Physique Nucléaire et de Hautes Énergies
5 APC - Neutrinos
6 LPSC - Laboratoire de Physique Subatomique et de Cosmologie
7 CPPM - Centre de Physique des Particules de Marseille
8 LAL - Laboratoire de l'Accélérateur Linéaire
9 IPHC - Institut Pluridisciplinaire Hubert Curien
10 IHEP - Institute of High Energy Physics

A measurement of the cross section for the inclusive production of isolated prompt photons in pp collisions at a centre-of-mass energy sqrt(s) = 7TeV is presented. The measurement covers the pseudorapidity ranges |eta|<1.37 and 1.52<|eta|<1.81 in the transverse energy range 15 < E_T <100 GeV. The results are based on an integrated luminosity of 880 nb-1, collected with the ATLAS detector at the Large Hadron Collider. Photon candidates are identified by combining information from the calorimeters and from the inner tracker. Residual background in the selected sample is estimated from data based on the observed distribution of the transverse isolation energy in a narrow cone around the photon candidate. The results are compared to predictions from next-to-leading order perturbative QCD calculations.

Domaines: Physique des Hautes Energies - Expérience [hep-ex]

G. Aad, B. Aubert, M. Aurousseau, N. Berger, J. Colas, et al.. Measurement of the inclusive isolated prompt photon cross section in pp collisions at sqrt(s) = 7 TeV with the ATLAS detector. Physical Review D, 2011, 83, pp.052005. ⟨10.1103/PhysRevD.83.052005⟩. ⟨in2p3-00553603⟩