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

By G. Aad, S. Albrand, M.L. Andrieux, B. Clement, J. Collot, S. Crépé-Renaudin, P.A. Delsart, J. Donini, D. Dzahini, J.Y. Hostachy, E. Laisne, F. Ledroit-Guillon, A. Lleres, A. Lucotte, F. Malek, P. Martin, F. Polci, J. Stark, X. Sun, B. Trocmé, C. Weydert, C. Biscarat, E. Cogneras, G. Rahal, H. Bachacou, F. Bauer, N. Besson, N.M. Bolnet, M. Boonekamp, L. Chevalier, J. Ernwein, A.I. Etienvre, A. Formica, L. Gauthier, F. Giraud, C. Guyot, S. Hassani, W. Kozanecki, E. Lancon, J.F. Laporte, E. Le Menedeu, M. Legendre, B. Mansoulie, J.-P. Meyer, N. Morange, E. Mountricha, Thi Hong, R. Nicolaidou, A. Ouraou, D.M. Pomarede, B. Resende, C.R. Royon, Ph. Schune, J. Schwindling, O. Simard, M. Virchaux, C. Xu, J. Yu, S. Aoun, C. P. Bee, C. Benchouk, K. Bernardet, N. Bousson, J. C. Clémens, Y. Coadou, P. Delpierre, F. Djama, F. Etienne, L. Feligioni, F. Henry-Couannier, D. Hoffmann, F. Hubaut, E.B. F. G. Knoops, E. Le Guirriec, B. Li, E. Monnier, J. Odier, E. Petit, P. Pralavorio, Z. Qian, A. Rozanov, M. Talby, N. Tannoury, S. Tisserant, J. Toth, F. Touchard, L. Vacavant, Emmanuel Busato, D. Calvet, S. Calvet, Reina Coromoto Camacho Toro, Diane Cinca, R. Febbraro, N. Ghodbane, C. Guicheney, D. Pallin, F. Podlyski, C. Santoni, L. P. Says, F. Vazeille, H. Abreu, N. Andari, C. Arnault, E. Augé, P. Barrillon, M. Benoit, S. Binet, J.-B. Blanchard, C. Bourdarios, D. Breton, C. Collard, C. De La Taille, J.B. De Vivie De Regie, S. Diglio, L. Duflot, M. Escalier, A.C. Falou, L. Fayard, D. Fournier, J.-F. Grivaz, M. Heller, S. Henrot-Versillé, J. Hrivnac, L. Iconomidou-Fayard, J. Idarraga, M. Kado, A. Lounis, N. Makovec, P. Matricon, F. Niedercorn, L. Poggioli, P. Puzo, A. Renaud, D. Rousseau, X. Ruan, G. Rybkin, J.B. Sauvan, J. Schaarschmidt, A.C. Schaffer, L. Serin, S. Simion, R. Tanaka, J.J. Veillet, I. Vukotic, F. Wicek, D. Zerwas, Zhen Zhang, L. Aperio Bella, B. Aubert, N. Berger, J. Colas, L. Di Ciaccio, T.K.O. Doan, S. Elles, P. Ghez, M. Gouanère, C. Goy, T. Guillemin, L. Helary, T. Hryn'Ova, G. Ionescu, A. Jérémie, S. Jézéquel, M. Kataoka, J. Labbe, R. Lafaye, J. Leveque, N. Massol, P. Perrodo, H. Przysiezniak, G. Sauvage, E. Sauvan, T. Todorov, D. Tsionou, I. Wingerter-Seez, R. Zitoun, Y. Zolnierowski, T. Beau, S. Bordoni, G. Calderini, A. Camard, P. Cavalleri, E. Chareyre, S. De Cecco, F. Derue, D. Imbault, M.W. Krasny, D. Lacour, B. Laforge, O. Le Dortz, J. Lellouch, G. Marchiori, I. Nikolic-Audit, J. Ocariz, M. Ridel, L. Roos, Ph. Schwemling, Timothée Theveneaux-Pelzer, S. Trincaz-Duvoid, T.N. Trinh and F. Vannucci

Abstract

See paper for full list of authors - 7 pages plus author list (19 pages total), 2 figures, 4 tables, submitted to Phys. Lett. BA 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

Topics: [PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Publisher: 'Elsevier BV'
Year: 2011
DOI identifier: 10.1016/j.physletb.2011.11.010
OAI identifier: oai:HAL:in2p3-00613010v1
Provided by: HAL AMU
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