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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

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 D. 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 6 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 7 N. Andari 7 C. Arnault 7 E. Augé 7 P. Barrillon 7 M. Benoit 7 S. Binet 7 J.-B. Blanchard 7 C. Bourdarios 7 D. Breton 7 C. Collard 8 C. de la Taille 7 J.B. de Vivie de Regie 7 S. Diglio 7 L. Duflot 7 M. Escalier 7 A.C. Falou 7 L. Fayard 7 D. Fournier 7 J.-F. Grivaz 7 M. Heller 7 S. Henrot-Versillé 7 J. Hrivnac 7 L. Iconomidou-Fayard 7 J. Idarraga 7 M. Kado 7 A. Lounis 7 N. Makovec 7 P. Matricon 7 F. Niedercorn 7 L. Poggioli 7 P. Puzo 7 A. Renaud 7 D. Rousseau 7 X. Ruan 7, 9 G. Rybkin 7 J.B. Sauvan 7 J. Schaarschmidt 7 A.C. Schaffer 7 L. Serin 7 S. Simion 7 R. Tanaka 7 J.J. Veillet 7 I. Vukotic 7 F. Wicek 7 D. Zerwas 7 Zhiqing Zhang 7 L. Aperio Bella 10 B. Aubert 10 N. Berger 10 J. Colas 10 L. Di Ciaccio 10 T.K.O. Doan 10 S. Elles 10 P. Ghez 10 M. Gouanère 10 C. Goy 10 T. Guillemin 10 L. Helary 10 T. Hryn'Ova 10 G. Ionescu 10 A. Jérémie 10 S. Jézéquel 10 M. Kataoka 10 J. Labbe 10 R. Lafaye 10 J. Leveque 10 N. Massol 10 P. Perrodo 10 H. Przysiezniak 10 G. Sauvage 10 E. Sauvan 10 T. Todorov 10 D. Tsionou 10 I. Wingerter-Seez 10 R. Zitoun 10 Y. Zolnierowski 10 T. Beau 11 S. Bordoni 11 G. Calderini 11 A. Camard 11 P. Cavalleri 11 E. Chareyre 11 S. de Cecco 11 F. Derue 11 D. Imbault 11 M.W. Krasny 11 D. Lacour 11 B. Laforge 11 O. Le Dortz 11 J. Lellouch 11 G. Marchiori 11 I. Nikolic-Audit 11 J. Ocariz 11 M. Ridel 11 L. Roos 11 Ph. Schwemling 11 Timothée Theveneaux-Pelzer 11 S. Trincaz-Duvoid 11 T.N. Trinh 11 F. Vannucci 12
Abstract : 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.
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Submitted on : Tuesday, August 2, 2011 - 9:34:22 AM
Last modification on : Tuesday, December 1, 2020 - 2:32:13 PM

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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, Elsevier, 2011, 706, pp.150-167. ⟨10.1016/j.physletb.2011.11.010⟩. ⟨in2p3-00613010⟩

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