Measurement of the inclusive isolated prompt photon cross-section in pp collisions at sqrt(s)= 7 TeV using 35 pb-1 of ATLAS data

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) , 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. Weydert (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. Mansoulie (3) , J.-P. Meyer (3) , N. Morange (3) , E. Mountricha (3) , Thi Hong (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. P. Bee (4) , C. Benchouk (4) , K. Bernardet (4) , N. Bousson (4) , J. C. Clémens (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 , 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 (5) , R. Febbraro (5) , N. Ghodbane (5) , C. Guicheney (5) , D. Pallin (5) , F. Podlyski (5) , C. Santoni (5) , L. P. Says (5) , F. Vazeille (5) , H. Abreu (6) , N. Andari (6) , C. Arnault (6) , E. Augé (6) , P. Barrillon (6) , M. Benoit (6) , S. Binet (6) , J.-B. Blanchard (6) , C. Bourdarios (6) , D. Breton (6) , C. Collard (7) , C. de La Taille (6) , J.B. de Vivie de Regie (6) , Sara Diglio (6) , L. Duflot (6) , M. Escalier (6) , A.C. Falou (6) , L. Fayard (6) , D. Fournier (6) , J.-F. Grivaz (6) , M. Heller (6) , S. Henrot-Versillé (6) , J. Hrivnac (6) , L. Iconomidou-Fayard (6) , J. Idarraga (6) , M. Kado (6) , A. Lounis (6) , N. Makovec (6) , P. Matricon (6) , F. Niedercorn (6) , L. Poggioli (6) , P. Puzo (6) , A. Renaud (6) , D. Rousseau (6) , X. Ruan (6, 8) , G. Rybkin (6) , J.B. Sauvan (6) , J. Schaarschmidt (6) , A.C. Schaffer (6) , L. Serin (6) , S. Simion (6) , R. Tanaka (6) , J.J. Veillet (6) , I. Vukotic (6) , F. Wicek (6) , D. Zerwas (6) , Zhiqing Zhang (6) , 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) , M. Gouanère (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) , N. Massol (9) , P. Perrodo (9) , H. Przysiezniak (9) , G. Sauvage (9) , E. Sauvan (9) , T. Todorov (9) , D. Tsionou (9) , I. Wingerter-Seez (9) , R. Zitoun (9) , Y. Zolnierowski (9) , T. Beau (10) , S. Bordoni (10) , G. Calderini (10) , A. Camard (10) , P. Cavalleri (10) , E. Chareyre (10) , S. de Cecco (10) , F. Derue (10) , D. Imbault (10) , M.W. Krasny (10) , D. Lacour (10) , B. Laforge (10) , O. Le Dortz (10) , J. Lellouch (10) , G. Marchiori (10) , I. Nikolic-Audit (10) , J. Ocariz (10) , M. Ridel (10) , L. Roos (10) , Ph. Schwemling (10) , Timothée Theveneaux-Pelzer (10) , S. Trincaz-Duvoid (10) , T.N. Trinh (10) , F. Vannucci (11)

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

A measurement of the differential cross-section for the inclusive production of isolated prompt photons in pp collisions at a center-of-mass energy sqrt(s) = 7 TeV is presented. The measurement covers the pseudorapidity ranges |eta|<1.37 and 1.52<=|eta|<2.37 in the transverse energy range 45<=E_T<400GeV. The results are based on an integrated luminosity of 35 pb-1, collected with the ATLAS detector at the LHC. The yields of the signal photons are measured using a data-driven technique, based on the observed distribution of the hadronic energy in a narrow cone around the photon candidate and the photon selection criteria. The results are compared with next-to-leading order perturbative QCD calculations and found to be in good agreement over four orders of magnitude in cross-section.

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

G. Aad, S. Albrand, M.L. Andrieux, B. Clement, J. Collot, et al.. Measurement of the inclusive isolated prompt photon cross-section in pp collisions at sqrt(s)= 7 TeV using 35 pb-1 of ATLAS data. Physics Letters B, 2011, 706, pp.150-167. ⟨10.1016/j.physletb.2011.11.010⟩. ⟨in2p3-00613010⟩