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Abstract

The production of prompt photons is measured in the photoproduction regime of electron–proton scattering at HERA. The analysis is based on a data sample corresponding to a total integrated luminosity of 340 pb−1 collected by the H1 experiment. Cross sections are measured for photons with transverse momentum and pseudorapidity in the range \(6<\ensuremath{E_{T}^{\gamma}}<15\) GeV and −1.0<ηγ<2.4, respectively. Cross sections for events with an additional jet are measured as a function of the transverse energy and pseudorapidity of the jet, and as a function of the fractional momenta xγ and xp carried by the partons entering the hard scattering process. The correlation between the photon and the jet is also studied. The results are compared with QCD predictions based on the collinear and on the kT factorization approaches.

Details

Title
Prompt photons in photoproduction at HERA
Author
Aaron, F D 1 ; Martin, M Aldaya 2 ; Alexa, C 1 ; Andreev, V 3 ; Antunovic, B 2 ; Backovic, S 4 ; Baghdasaryan, A 5 ; Barrelet, E 6 ; Bartel, W 2 ; Begzsuren, K 7 ; Belousov, A 3 ; Bizot, J C 8 ; Boudry, V 9 ; Bozovic-Jelisavcic, I 10 ; Bracinik, J 11 ; Brandt, G 2 ; Brinkmann, M 12 ; Brisson, V 8 ; Bruncko, D 13 ; Bunyatyan, A 14 ; Buschhorn, G 15 ; Bystritskaya, L 16 ; Campbell, A J 2 ; Cantun Avila, K B 17 ; Cerny, K 18 ; Cerny, V 13 ; Chekelian, V 15 ; Cholewa, A 2 ; Contreras, J G 17 ; Coughlan, J A 19 ; Cozzika, G 20 ; Cvach, J 21 ; Dainton, J B 22 ; Daum, K 23 ; Deák, M 2 ; de Boer, Y 2 ; Delcourt, B 8 ; M Del Degan 24 ; Delvax, J 25 ; De Wolf, E A 25 ; Diaconu, C 26 ; Dodonov, V 27 ; Dossanov, A 15 ; Dubak, A 4 ; Eckerlin, G 2 ; Efremenko, V 16 ; Egli, S 28 ; Eliseev, A 3 ; Elsen, E 2 ; Falkiewicz, A 29 ; Favart, L 25 ; Fedotov, A 16 ; Felst, R 2 ; Feltesse, J 20 ; Ferencei, J 13 ; D-J Fischer 2 ; Fleischer, M 2 ; Fomenko, A 3 ; Gabathuler, E 22 ; Gayler, J 2 ; Ghazaryan, S 5 ; Glazov, A 2 ; Glushkov, I 30 ; Goerlich, L 29 ; Gogitidze, N 3 ; Gouzevitch, M 2 ; Grab, C 24 ; Greenshaw, T 22 ; Grell, B R 2 ; Grindhammer, G 15 ; Habib, S 12 ; Haidt, D 2 ; Helebrant, C 2 ; Henderson, R C W 31 ; Hennekemper, E 32 ; Henschel, H 30 ; Herbst, M 32 ; Herrera, G 33 ; Hildebrandt, M 28 ; Hiller, K H 30 ; Hoffmann, D 26 ; Horisberger, R 28 ; Hreus, T 25 ; Jacquet, M 8 ; Janssen, X 25 ; Jönsson, L 34 ; Jung, A W 32 ; Jung, H 2 ; Kapichine, M 35 ; Katzy, J 2 ; Kenyon, I R 11 ; Kiesling, C 15 ; Klein, M 22 ; Kleinwort, C 2 ; Kluge, T 22 ; Knutsson, A 2 ; Kogler, R 15 ; Kostka, P 30 ; Kraemer, M 2 ; Krastev, K 2 ; Kretzschmar, J 22 ; Kropivnitskaya, A 16 ; Krüger, K 32 ; Kutak, K 2 ; Landon, M P J 36 ; Lange, W 30 ; Laštovička-Medin, G 4 ; Laycock, P 22 ; Lebedev, A 3 ; Leibenguth, G 24 ; Lendermann, V 32 ; Levonian, S 2 ; G Li 8 ; Lipka, K 2 ; Liptaj, A 15 ; List, B 12 ; List, J 2 ; Loktionova, N 3 ; Lopez-Fernandez, R 33 ; Lubimov, V 16 ; Makankine, A 35 ; Malinovski, E 3 ; Marage, P 25 ; Ll Marti 2 ; H-U, Martyn 37 ; Maxfield, S J 22 ; Mehta, A 22 ; Meyer, A B 2 ; Meyer, H 2 ; Meyer, J 2 ; Michels, V 2 ; Mikocki, S 29 ; Milcewicz-Mika, I 29 ; Moreau, F 9 ; Morozov, A 35 ; Morris, J V 19 ; Mozer, M U 25 ; Mudrinic, M 10 ; Müller, K 38 ; Murín, P 13 ; Naumann, Th 30 ; Newman, P R 11 ; Niebuhr, C 2 ; Nikiforov, A 2 ; Nikitin, D 35 ; Nowak, G 29 ; Nowak, K 38 ; Nozicka, M 2 ; Olivier, B 15 ; Olsson, J E 2 ; Osman, S 34 ; Ozerov, D 16 ; Palichik, V 35 ; Panagoulias, I 2 ; Pandurovic, M 10 ; Papadopoulou, Th 2 ; Pascaud, C 8 ; Patel, G D 22 ; Pejchal, O 18 ; Perez, E 20 ; Petrukhin, A 16 ; Picuric, I 4 ; Piec, S 30 ; Pitzl, D 2 ; Plačakytė, R 2 ; Pokorny, B 12 ; Polifka, R 18 ; Povh, B 27 ; Radescu, V 2 ; Rahmat, A J 22 ; Raicevic, N 4 ; Raspiareza, A 15 ; Ravdandorj, T 7 ; Reimer, P 21 ; Rizvi, E 36 ; Robmann, P 38 ; Roland, B 25 ; Roosen, R 25 ; Rostovtsev, A 16 ; Rotaru, M 1 ; Ruiz Tabasco, J E 17 ; Rurikova, Z 2 ; Rusakov, S 3 ; Šálek, D 18 ; Sankey, D P C 19 ; Sauter, M 24 ; Sauvan, E 26 ; Schmitt, S 2 ; Schoeffel, L 20 ; Schöning, A 39 ; H-C Schultz-Coulon 32 ; Sefkow, F 2 ; Shaw-West, R N 11 ; Shtarkov, L N 3 ; Shushkevich, S 15 ; Sloan, T 31 ; Smiljanic, I 10 ; Soloviev, Y 3 ; Sopicki, P 29 ; South, D 40 ; Spaskov, V 35 ; Specka, A 9 ; Staykova, Z 2 ; Steder, M 2 ; Stella, B 41 ; Stoicea, G 1 ; Straumann, U 38 ; Sunar, D 25 ; Sykora, T 25 ; Tchoulakov, V 35 ; Thompson, G 36 ; Thompson, P D 11 ; Toll, T 12 ; Tomasz, F 13 ; Tran, T H 8 ; Traynor, D 36 ; Trinh, T N 26 ; Truöl, P 38 ; Tsakov, I 42 ; Tseepeldorj, B 7 ; Turnau, J 29 ; Urban, K 32 ; Valkárová, A 18 ; Vallée, C 26 ; P Van Mechelen 25 ; A Vargas Trevino 2 ; Vazdik, Y 3 ; Vinokurova, S 2 ; Volchinski, V 5 ; von den Driesch, M 2 ; Wegener, D 40 ; Wissing, Ch 2 ; Wünsch, E 2 ; Žáček, J 18 ; Zálešák, J 21 ; Zhang, Z 8 ; Zhokin, A 16 ; Zimmermann, T 24 ; Zohrabyan, H 5 ; Zomer, F 8 ; Zus, R 1 

1  National Institute for Physics and Nuclear Engineering (NIPNE), Bucharest, Romania 
2  DESY, Hamburg, Germany 
3  Lebedev Physical Institute, Moscow, Russia 
4  Faculty of Science, University of Montenegro, Podgorica, Montenegro 
5  Yerevan Physics Institute, Yerevan, Armenia 
6  LPNHE, Universités Paris VI and VII, CNRS/IN2P3, Paris, France 
7  Institute of Physics and Technology of the Mongolian Academy of Sciences, Ulaanbaatar, Mongolia 
8  LAL, Univ. Paris-Sud, CNRS/IN2P3, Orsay, France 
9  LLR, Ecole Polytechnique, CNRS/IN2P3, Palaiseau, France 
10  Vinca Institute of Nuclear Sciences, Belgrade, Serbia 
11  School of Physics and Astronomy, University of Birmingham, Birmingham, UK 
12  Institut für Experimentalphysik, Universität Hamburg, Hamburg, Germany 
13  Institute of Experimental Physics, Slovak Academy of Sciences, Košice, Slovak Republic 
14  Max-Planck-Institut für Kernphysik, Heidelberg, Germany; Yerevan Physics Institute, Yerevan, Armenia 
15  Max-Planck-Institut für Physik, München, Germany 
16  Institute for Theoretical and Experimental Physics, Moscow, Russia 
17  Departamento de Fisica Aplicada, CINVESTAV, Mérida, Yucatán, Mexico 
18  Faculty of Mathematics and Physics, Charles University, Praha, Czech Republic 
19  Rutherford Appleton Laboratory, Chilton, Didcot, UK 
20  CEA, DSM/Irfu, CE-Saclay, Gif-sur-Yvette, France 
21  Institute of Physics, Academy of Sciences of the Czech Republic, Praha, Czech Republic 
22  Department of Physics, University of Liverpool, Liverpool, UK 
23  Fachbereich C, Universität Wuppertal, Wuppertal, Germany 
24  Institut für Teilchenphysik, ETH, Zürich, Switzerland 
25  Inter-University Institute for High Energies ULB-VUB, Brussels, Belgium; Universiteit Antwerpen, Antwerpen, Belgium 
26  CPPM, CNRS/IN2P3—Univ. Mediterranee, Marseille, France 
27  Max-Planck-Institut für Kernphysik, Heidelberg, Germany 
28  Paul Scherrer Institut, Villigen, Switzerland 
29  Institute for Nuclear Physics, Cracow, Poland 
30  DESY, Zeuthen, Germany 
31  Department of Physics, University of Lancaster, Lancaster, UK 
32  Kirchhoff-Institut für Physik, Universität Heidelberg, Heidelberg, Germany 
33  Departamento de Fisica, CINVESTAV, México City, Mexico 
34  Physics Department, University of Lund, Lund, Sweden 
35  Joint Institute for Nuclear Research, Dubna, Russia 
36  Queen Mary and Westfield College, London, UK 
37  I. Physikalisches Institut der RWTH, Aachen, Germany 
38  Physik-Institut der Universität Zürich, Zürich, Switzerland 
39  Physikalisches Institut, Universität Heidelberg, Heidelberg, Germany 
40  Institut für Physik, TU Dortmund, Dortmund, Germany 
41  Dipartimento di Fisica Università di Roma Tre and INFN Roma 3, Roma, Italy 
42  Institute for Nuclear Research and Nuclear Energy, Sofia, Bulgaria 
Pages
17-33
Publication year
2010
Publication date
Mar 2010
Publisher
Springer Nature B.V.
ISSN
14346044
e-ISSN
14346052
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1140/epjc/s10052-010-1240-7
ProQuest document ID
2294033796
Copyright
The European Physical Journal C is a copyright of Springer, (2010). All Rights Reserved.