Measurement of prompt photon cross sections in photoproduction at HERA

Aktas, A; Andreev, V; Anthonis, T; Asmone, A; Babaev, A; Backovic, S; Bahr, J; Baranov, P; Barrelet, E; Bartel, W; Baumgartner, S; Becker, J; Beckingham, M; Behnke, O; Behrendt, O; Belousov, A; Berger, Ch; Berger, N; Berndt, T; Bizot, JC; Bohme, J; Boenig, M-O; Boudry, V; Bracinik, J; Brisson, V; Broker, H-B; Brown, DP; Bruncko, D; Busser, FW; Bunyatyan, A; Buschhorn, G; Bystritskaya, L; Campbell, AJ; Caron, S; Cassol-Brunner, F; Cerny, K; Chekelian, V; Collard, C; Contreras, JG; Coppens, YR; Coughlan, JA; Cox, BE; Cozzika, G; Cvach, J; Dainton, JB; Dau, WD; Daum, K; Delcourt, B; Demirchyan, R; De Roeck, A; Desch, K; De Wolf, EA; Diaconu, C; Dingfelder, J; Dodonov, V; Dubak, A; Duprel, C; Eckerlin, G; Efremenko, V; Egli, S; Eichler, R; Eisele, F; Ellerbrock, M; Elsen, E; Erdmann, M; Erdmann, W; Faulkner, PJW; Favart, L; Fedotov, A; Felst, R; Ferencei, J; Fleischer, M; Fleischmann, P; Fleming, YH; Flucke, G; Flugge, G; Fomenko, A; Foresti, I; Formanek, J; Franke, G; Frising, G; Gabathuler, E; Gabathuler, K; Garutti, E; Garvey, J; Gayler, J; Gerhards, R; Gerlich, C; Ghazaryan, S; Goerlich, L; Gogitidze, N; Gorbounov, S; Grab, C; Grassler, H; Greenshaw, T; Gregori, M; Grindhammer, G; Gwilliam, C; Haidt, D; Hajduk, L; Haller, J; Hansson, M; Heinzelmann, G; Henderson, RCW; Henschel, H; Henshaw, O; Heremans, R; Herrera, G; Herynek, I; Heuer, R-D; Hildebrandt, M; Hiller, KH; Hladky, J; Hoting, P; Hoffmann, D; Horisberger, R; Hovhannisyan, A; Ibbotson, M; Ismail, M; Jacquet, M; Janauschek, L; Janssen, X; Jemanov, V; Jonsson, L; Johnson, DP; Jung, H; Kant, D; Kapichine, M; Karlsson, M; Katzy, J; Keller, N; Kennedy, J; Kenyon, IR; Kiesling, C; Klein, M; Kleinwort, C; Kluge, T; Knies, G; Knutsson, A; Koblitz, B; Korbel, V; Kostka, P; Koutouev, R; Kropivnitskaya, A; Kroseberg, J; Kuckens, J; Kuhr, T; Landon, MPJ; Lange, W; Lastovicka, T; Laycock, P; Lebedev, A; Leissner, B; Lemrani, R; Lendermann, V; Levonian, S; Lindfeld, L; Lipka, K; List, B; Lobodzinska, E; Loktionova, N; Lopez-Fernandez, R; Lubimov, V; Lueders, H; Luke, D; Lux, T; Lytkin, L; Makankine, A; Malden, N; Malinovski, E; Mangano, S; Marage, P; Marks, J; Marshall, R; Martisikova, M; Martyn, H-U; Maxfield, SJ; Meer, D; Mehta, A; Meier, K; Meyer, AB; Meyer, H; Meyer, J; Michine, S; Mikocki, S; Milcewicz-Mika, I; Milstead, D; Mohamed, A; Moreau, F; Morozov, A; Morozov, I; Morris, JV; Mozer, MU; Muller, K; Murin, P; Nagovizin, V; Naroska, B; Naumann, J; Naumann, Th; Newman, PR; Niebuhr, C; Nikiforov, A; Nikitin, D; Nowak, G; Nozicka, M; Oganezov, R; Olivier, B; Olsson, JE; Ossoskov, G; Ozerov, D; Pascaud, C; Patel, GD; Peez, M; Perez, E; Perieanu, A; Petrukhin, A; Pitzl, D; Placakyte, R; Poschl, R; Portheault, B; Povh, B; Raicevic, N; Ratiani, Z; Reimer, P; Reisert, B; Rimmer, A; Risler, C; Rizvi, E; Robmann, P; Roland, B; Roosen, R; Rostovtsev, A; Rurikova, Z; Rusakov, S; Rybicki, K; Sankey, DPC; Sauvan, E; Schatzel, S; Scheins, J; Schilling, F-P; Schleper, P; Schmidt, S; Schmitt, S; Schneider, M; Schoeffel, L; Schoning, A; Schroder, V; Schultz-Coulon, H-C; Schwanenberger, C; Sedlak, K; Sefkow, F; Sheviakov, I; Shtarkov, LN; Sirois, Y; Sloan, T; Smirnov, P; Soloviev, Y; South, D; Spaskov, V; Specka, A; Spitzer, H; Stamen, R; Stella, B; Stiewe, J; Strauch, I; Straumann, U; Tchoulakov, V; Thompson, G; Thompson, PD; Tomasz, F; Traynor, D; Truol, P; Tsipolitis, G; Tsurin, I; Turnau, J; Tzamariudaki, E; Uraev, A; Urban, M; Usik, A; Utkin, D; Valkar, S; Valkarova, A; Vallee, C; Van Mechelen, P; Vargas Trevino, A; Vazdik, Y; Veelken, C; Vest, A; Vinokurova, S; Volchinski, V; Wacker, K; Wagner, J; Weber, G; Weber, R; Wegener, D; Werner, C; Werner, N; Wessels, M; Wessling, B; Winter, G-G; Wissing, Ch; Woehrling, E-E; Wolf, R; Wunsch, E; Xella, S; Yan, W; Zacek, J; Zalesak, J; Zhang, Z; Zhokin, A; Zohrabyan, H; Zomer, F

dc.contributor.author	Aktas, A	en
dc.contributor.author	Andreev, V	en
dc.contributor.author	Anthonis, T	en
dc.contributor.author	Asmone, A	en
dc.contributor.author	Babaev, A	en
dc.contributor.author	Backovic, S	en
dc.contributor.author	Bahr, J	en
dc.contributor.author	Baranov, P	en
dc.contributor.author	Barrelet, E	en
dc.contributor.author	Bartel, W	en
dc.contributor.author	Baumgartner, S	en
dc.contributor.author	Becker, J	en
dc.contributor.author	Beckingham, M	en
dc.contributor.author	Behnke, O	en
dc.contributor.author	Behrendt, O	en
dc.contributor.author	Belousov, A	en
dc.contributor.author	Berger, Ch	en
dc.contributor.author	Berger, N	en
dc.contributor.author	Berndt, T	en
dc.contributor.author	Bizot, JC	en
dc.contributor.author	Bohme, J	en
dc.contributor.author	Boenig, M-O	en
dc.contributor.author	Boudry, V	en
dc.contributor.author	Bracinik, J	en
dc.contributor.author	Brisson, V	en
dc.contributor.author	Broker, H-B	en
dc.contributor.author	Brown, DP	en
dc.contributor.author	Bruncko, D	en
dc.contributor.author	Busser, FW	en
dc.contributor.author	Bunyatyan, A	en
dc.contributor.author	Buschhorn, G	en
dc.contributor.author	Bystritskaya, L	en
dc.contributor.author	Campbell, AJ	en
dc.contributor.author	Caron, S	en
dc.contributor.author	Cassol-Brunner, F	en
dc.contributor.author	Cerny, K	en
dc.contributor.author	Chekelian, V	en
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dc.contributor.author	Contreras, JG	en
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dc.contributor.author	Dau, WD	en
dc.contributor.author	Daum, K	en
dc.contributor.author	Delcourt, B	en
dc.contributor.author	Demirchyan, R	en
dc.contributor.author	De Roeck, A	en
dc.contributor.author	Desch, K	en
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dc.contributor.author	Elsen, E	en
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dc.contributor.author	Erdmann, W	en
dc.contributor.author	Faulkner, PJW	en
dc.contributor.author	Favart, L	en
dc.contributor.author	Fedotov, A	en
dc.contributor.author	Felst, R	en
dc.contributor.author	Ferencei, J	en
dc.contributor.author	Fleischer, M	en
dc.contributor.author	Fleischmann, P	en
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dc.contributor.author	Gabathuler, K	en
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dc.contributor.author	Wissing, Ch	en
dc.contributor.author	Woehrling, E-E	en
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dc.contributor.author	Wunsch, E	en
dc.contributor.author	Xella, S	en
dc.contributor.author	Yan, W	en
dc.contributor.author	Zacek, J	en
dc.contributor.author	Zalesak, J	en
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dc.date.accessioned	2014-03-01T01:22:43Z
dc.date.available	2014-03-01T01:22:43Z
dc.date.issued	2005	en
dc.identifier.issn	1434-6044	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16633
dc.subject.classification	Physics, Particles & Fields	en
dc.subject.other	PHYSICS EVENT GENERATION	en
dc.subject.other	PLUS JET PHOTOPRODUCTION	en
dc.subject.other	TO-LEADING-ORDER	en
dc.subject.other	PARTON DISTRIBUTIONS	en
dc.subject.other	DESY HERA	en
dc.subject.other	CALORIMETER	en
dc.subject.other	FRAGMENTATION	en
dc.subject.other	PROTON	en
dc.subject.other	QCD	en
dc.title	Measurement of prompt photon cross sections in photoproduction at HERA	en
heal.type	journalArticle	en
heal.identifier.primary	10.1140/epjc/s2004-02085-x	en
heal.identifier.secondary	http://dx.doi.org/10.1140/epjc/s2004-02085-x	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	Results are presented on the photoproduction of isolated prompt photons, inclusively and associated with jets, in the γp center of mass energy range 142 < W < 266 GeV. The cross sections are measured for the transverse momentum range of the photons 5 < ETγ < 10 GeV and for associated jets with ETjet > 4.5 GeV. They are measured differentially as a function of ETγ, ETjet, the pseudorapidities ηγ and ηjet and estimators of the momentum fractions xγ and xp of the incident photon and proton carried by the constituents participating in the hard process. In order to further investigate the underlying dynamics, the angular correlation between the prompt photon and the jet in the transverse plane is studied. Predictions by perturbative QCD calculations in next to leading order are about 30% below the inclusive prompt photon data after corrections for hadronisation and multiple interactions, but are in reasonable agreement with the results for prompt photons associated with jets. Comparisons with the predictions of the event generators PYTHIA and HERWIG are also presented. © Springer-Verlag/ Società Italiana di Fisica 2004.	en
heal.publisher	SPRINGER	en
heal.journalName	European Physical Journal C	en
dc.identifier.doi	10.1140/epjc/s2004-02085-x	en
dc.identifier.isi	ISI:000226120100004	en
dc.identifier.volume	38	en
dc.identifier.issue	4	en
dc.identifier.spage	437	en
dc.identifier.epage	445	en