Measurement of prompt photon cross sections in photoproduction at HERA

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

doi:10.1140/epjc/s2004-02085-x

Measurement of prompt photon cross sections in photoproduction at HERA

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

Particle and nuclear physics

Research output: Contribution to journal › Article › peer-review

Abstract

Results are presented on the photoproduction of isolated prompt photons, inclusively and associated with jets, in the gammap center of mass energy range 142 < W < 266 GeV. The cross sections are measured for the transverse momentum range of the photons 5 < E. T < 10 GeV and for associated jets with E-T(jet) > 4.5 GeV. They are measured differentially as a function of E-T(gamma), E-T(jet), the pseudorapidities eta(gamma) and eta(jet) and estimators of the momentum fractions x(gamma) and x(p) 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.

Original language	English
Pages (from-to)	437-445
Journal	European Physical Journal C. Particles and Fields
Volume	38
Issue number	4
DOIs	https://doi.org/10.1140/epjc/s2004-02085-x
Publication status	Published - 2005

Subject classification (UKÄ)

Subatomic Physics

Access to Document

10.1140/epjc/s2004-02085-x

Cite this

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, C., Berger, N., Berndt, T., ... Zomer, F. (2005). Measurement of prompt photon cross sections in photoproduction at HERA. European Physical Journal C. Particles and Fields, 38(4), 437-445. https://doi.org/10.1140/epjc/s2004-02085-x

@article{835997bb28b243eeba654e9cc2a5f5e3,

title = "Measurement of prompt photon cross sections in photoproduction at HERA",

abstract = "Results are presented on the photoproduction of isolated prompt photons, inclusively and associated with jets, in the gammap center of mass energy range 142 < W < 266 GeV. The cross sections are measured for the transverse momentum range of the photons 5 < E. T < 10 GeV and for associated jets with E-T(jet) > 4.5 GeV. They are measured differentially as a function of E-T(gamma), E-T(jet), the pseudorapidities eta(gamma) and eta(jet) and estimators of the momentum fractions x(gamma) and x(p) 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.",

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

year = "2005",

doi = "10.1140/epjc/s2004-02085-x",

language = "English",

volume = "38",

pages = "437--445",

journal = "European Physical Journal C. Particles and Fields",

issn = "1434-6044",

publisher = "Springer",

number = "4",

}

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, C, Berger, N, Berndt, T, Bizot, JC, Bohme, J, Boenig, MO, Boudry, V, Bracinik, J, Brisson, V, Broker, HB, 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, RD, 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, Jönsson, 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, HU, 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, T, Newman, PR, Niebuhr, C, Nikiforov, A, Nikitin, D, Nowak, G, Nozicka, M, Oganezov, R, Olivier, B, Olsson, E, 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, FP, Schleper, P, Schmidt, S, Schmitt, S, Schneider, M, Schoeffel, L, Schoning, A, Schroder, V, Schultz-Coulon, HC, 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, Trevino, AV, 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, GG, Wissing, C, Woehrling, EE, Wolf, R, Wunsch, E, Xella, S, Yan, W, Zacek, J, Zalesak, J, Zhang, Z, Zhokin, A, Zohrabyan, H & Zomer, F 2005, 'Measurement of prompt photon cross sections in photoproduction at HERA', European Physical Journal C. Particles and Fields, vol. 38, no. 4, pp. 437-445. https://doi.org/10.1140/epjc/s2004-02085-x

TY - JOUR

T1 - Measurement of prompt photon cross sections in photoproduction at HERA

AU - Aktas, A

AU - Andreev, V

AU - Anthonis, T

AU - Asmone, A

AU - Babaev, A

AU - Backovic, S

AU - Bahr, J

AU - Baranov, P

AU - Barrelet, E

AU - Bartel, W

AU - Baumgartner, S

AU - Becker, J

AU - Beckingham, M

AU - Behnke, O

AU - Behrendt, O

AU - Belousov, A

AU - Berger, C

AU - Berger, N

AU - Berndt, T

AU - Bizot, JC

AU - Bohme, J

AU - Boenig, MO

AU - Boudry, V

AU - Bracinik, J

AU - Brisson, V

AU - Broker, HB

AU - Brown, DP

AU - Bruncko, D

AU - Busser, FW

AU - Bunyatyan, A

AU - Buschhorn, G

AU - Bystritskaya, L

AU - Campbell, AJ

AU - Caron, S

AU - Cassol-Brunner, F

AU - Cerny, K

AU - Chekelian, V

AU - Collard, C

AU - Contreras, JG

AU - Coppens, YR

AU - Coughlan, JA

AU - Cox, BE

AU - Cozzika, G

AU - Cvach, J

AU - Dainton, JB

AU - Dau, WD

AU - Daum, K

AU - Delcourt, B

AU - Demirchyan, R

AU - De Roeck, A

AU - Desch, K

AU - De Wolf, EA

AU - Diaconu, C

AU - Dingfelder, J

AU - Dodonov, V

AU - Dubak, A

AU - Duprel, C

AU - Eckerlin, G

AU - Efremenko, V

AU - Egli, S

AU - Eichler, R

AU - Eisele, F

AU - Ellerbrock, M

AU - Elsen, E

AU - Erdmann, M

AU - Erdmann, W

AU - Faulkner, PJW

AU - Favart, L

AU - Fedotov, A

AU - Felst, R

AU - Ferencei, J

AU - Fleischer, M

AU - Fleischmann, P

AU - Fleming, YH

AU - Flucke, G

AU - Flugge, G

AU - Fomenko, A

AU - Foresti, I

AU - Formanek, J

AU - Franke, G

AU - Frising, G

AU - Gabathuler, E

AU - Gabathuler, K

AU - Garutti, E

AU - Garvey, J

AU - Gayler, J

AU - Gerhards, R

AU - Gerlich, C

AU - Ghazaryan, S

AU - Goerlich, L

AU - Gogitidze, N

AU - Gorbounov, S

AU - Grab, C

AU - Grassler, H

AU - Greenshaw, T

AU - Gregori, M

AU - Grindhammer, G

AU - Gwilliam, C

AU - Haidt, D

AU - Hajduk, L

AU - Haller, J

AU - Hansson, Magnus

AU - Heinzelmann, G

AU - Henderson, RCW

AU - Henschel, H

AU - Henshaw, O

AU - Heremans, R

AU - Herrera, G

AU - Herynek, I

AU - Heuer, RD

AU - Hildebrandt, M

AU - Hiller, KH

AU - Hladky, J

AU - Hoting, P

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PY - 2005

Y1 - 2005

N2 - Results are presented on the photoproduction of isolated prompt photons, inclusively and associated with jets, in the gammap center of mass energy range 142 < W < 266 GeV. The cross sections are measured for the transverse momentum range of the photons 5 < E. T < 10 GeV and for associated jets with E-T(jet) > 4.5 GeV. They are measured differentially as a function of E-T(gamma), E-T(jet), the pseudorapidities eta(gamma) and eta(jet) and estimators of the momentum fractions x(gamma) and x(p) 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.

AB - Results are presented on the photoproduction of isolated prompt photons, inclusively and associated with jets, in the gammap center of mass energy range 142 < W < 266 GeV. The cross sections are measured for the transverse momentum range of the photons 5 < E. T < 10 GeV and for associated jets with E-T(jet) > 4.5 GeV. They are measured differentially as a function of E-T(gamma), E-T(jet), the pseudorapidities eta(gamma) and eta(jet) and estimators of the momentum fractions x(gamma) and x(p) 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.

U2 - 10.1140/epjc/s2004-02085-x

DO - 10.1140/epjc/s2004-02085-x

M3 - Article

SN - 1434-6044

VL - 38

SP - 437

EP - 445

JO - European Physical Journal C. Particles and Fields

JF - European Physical Journal C. Particles and Fields

IS - 4

ER -

Measurement of prompt photon cross sections in photoproduction at HERA

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