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4 results on '"photoproduction [photon]"'

1. Studies of the diffractive photoproduction of isolated photons at HERA

Author

A. Bruni, Enrico Tassi, G. Grzelak, Claire Gwenlan, Marco Schioppa, Leszek Adamczyk, Masaki Ishitsuka, Yuji Yamazaki, Volodymyr Myronenko, Mykhailo Lisovyi, Uta Klein, P. Stopa, B. B. Levchenko, I. Abt, O. Yu. Lukina, J. Tomaszewska, A. Longhin, Robert Ciesielski, Allen Caldwell, Elisabetta Gallo, Yu. Onishchuk, Oleksii Turkot, Zainol Abidin Ibrahim, O. Behnke, T. Tymieniecka, Marcin Pawel Guzik, A. M. Cooper-Sarkar, I. A. Korzhavina, Shoichi Yamada, R.C.E. Devenish, T. Schörner-Sadenius, Yu. A. Golubkov, E. Paul, Achim Geiser, A. Kotański, Masahiro Kuze, I. Kadenko, J. Sztuk-Dambietz, Andrii Verbytskyi, Marta Ruspa, S. Antonelli, Andrii Gizhko, U. Karshon, Aharon Levy, Y. Iga, W. Perlanski, S. Kananov, V. Aushev, E. Lohrmann, M. Adamus, A. Garfagnini, Grzegorz Gach, Af Zarnecki, F. Mohamad Idris, W. Slominski, Ewelina Lobodzinska, N. Z. Jomhari, U. Schneekloth, R. Hori, B. Löhr, R. Brugnera, D. Hochman, Yu.O. Shyrma, N.S. Pokrovskiy, Ian Brock, L. M. Shcheglova, P. J. Bussey, Ada Solano, Nataliia Kovalchuk, B.O. Zhautykov, D. H. Saxon, B. Foster, S. Dusini, L. Stanco, A. Stern, N. Mohammad Nasir, Oleg Kuprash, L. K. Gladilin, O. Zenaiev, R. K. Dementiev, I. O. Skillicorn, Ingo Bloch, Nazar Stefaniuk, Anna Mastroberardino, N. H. Brook, Matthew Wing, Mariusz Przybycien, Danuta Kisielewska, M. Corradi, Ulf Behrens, H. Kowalski, K. Wichmann, W. A. T. Wan Abdullah, A. Bertolin, L. Zawiejski, M. Turcato, Kunihiro Nagano, P. Kaur, Katsuo Tokushuku, J. Malka, J. Ciborowski, Janusz Chwastowski, A. Polini, T. Tsurugai, Marcella Capua, Robert Klanner, C. D. Catterall, O. Shkola, B. Krupa, O. Hlushchenko, Halina Abramowicz, and Y. Aushev

Subjects
Photon, Physics and Astronomy (miscellaneous), diffraction, photon: photoproduction, transverse energy [photon], jet: transverse momentum, Jet (particle physics), transverse momentum [jet], 01 natural sciences, High Energy Physics - Experiment, High Energy Physics - Experiment (hep-ex), Pomeron, photoproduction [photon], electron p, Nuclear Experiment, Monte Carlo, HERA, ZEUS, QCD, Photoproduction, Diffraction, colliding beams [electron p], photon: transverse energy, Physics, Luminosity (scattering theory), longitudinal momentum, Monte Carlo [numerical calculations], HERA, DESY HERA Stor, electron p: colliding beams, Photoproduction, kinematics, Pseudorapidity, rapidity [jet], numerical calculations: Monte Carlo, Diffraction, photoproduction, electron p: deep inelastic scattering, Particle physics, pomeron: interaction, diffraction: dissociation, FOS: Physical sciences, differential cross section: measured, Nuclear physics, measured [differential cross section], 0103 physical sciences, ddc:530, 010306 general physics, ZEUS (particle detector), rapidity [photon], 010308 nuclear & particles physics, High Energy Physics::Phenomenology, ZEUS, Deep inelastic scattering, QCD, rapidity, photon: rapidity, jet: rapidity, deep inelastic scattering [electron p], High Energy Physics::Experiment, dissociation [diffraction], interaction [pomeron], experimental results
Abstract

Physical review / D 96(3), 032006(2017). doi:10.1103/PhysRevD.96.032006, The photoproduction of isolated photons has been measured in diffractive events recorded by the ZEUS detector at HERA. Cross sections are evaluated in the photon transverse-energy and pseudorapidity ranges $5 < E_T < 15$ GeV and $-0.7 < \eta < 0.9,$ inclusively and also with a jet with transverse energy and pseudorapidity in the ranges $4 < E_{jet} < 35$ GeV and $-1.5 < \eta_{jet} < 1.8,$ using a total integrated electron-proton luminosity of 456 pb$^{-1}$. A number of kinematic variables were studied and compared to predictions from the Rapgap Monte Carlo model. An excess of data is observed above the Rapgap predictions for $z^{meas}_{Pomeron} > 0.9,$ where $z^{meas}_{Pomeron}$ is the fraction of the longitudinal momentum of the colourless 'Pomeron' exchange that is transferred to the photon-jet final state, giving evidence for direct Pomeron interactions., Published by Inst., Woodbury, NY

Published
2017
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2. Photoproduction of isolated photons, inclusively and with a jet, at HERA

Author

R.C.E. Devenish, J. Ciborowski, Manjit Kaur, N. Stefaniuk, Katsuo Tokushuku, J. Malka, Roman Walczak, I.O. Skillicorn, K. Mujkic, Janusz Chwastowski, Sebastian Mergelmeyer, Danuta Kisielewska, Ie. Korol, O. Kononenko, T. P. Stewart, B. B. Levchenko, Takuya Nobe, J. F. Martin, Alexander Spiridonov, F. Mohamad Idris, A. Bertolin, J. Behr, Yu. A. Golubkov, E. Paul, N. Zakharchuk, O. Bachynska, A. Bruni, B. Brzozowska, I. A. Korzhavina, V. Aushev, Hanno Perrey, W. Słomiński, Nazar Bartosik, Enrico Tassi, J. Maeda, M. Turcato, R. Ciesielski, V. Myronenko, L. Zawiejski, K. Wichmann, Ulf Behrens, H. Kowalski, M. Adamus, Yu. Onishchuk, J. Szuba, A. Kotański, O. Kuprash, Jan Figiel, D. Lontkovskyi, S. Bhadra, U. Klein, V. Sola, N. Kondrashova, V. Samojlov, Ganna Dolinska, Ozan Arslan, O. Yu. Lukina, D.H. Saxon, A. N. Barakbaev, A. Raval, A. Iudin, V. Trusov, M. Lisovyi, S. Yamada, Marco Schioppa, R. Shevchenko, A. Longhin, P. Stopa, Leszek Adamczyk, P. Kaur, A. Stern, Allen Caldwell, A. Nigro, W. A. T. Wan Abdullah, I. Abt, O. Zenaiev, Zainol Abidin Ibrahim, W. Perlanski, B. Löhr, T. Tymieniecka, J. Ferrando, J. Grebenyuk, V. Drugakov, E. Lobodzinska, Lev Khein, U. Kötz, D. Notz, F. Corriveau, G. Grzelak, T. Tsurugai, Ada Solano, Masaki Ishitsuka, Andrii Gizhko, V. Bokhonov, K. Olkiewicz, W. Hain, Aleksander Filip Żarnecki, F. Januschek, Wolfgang Lohmann, S. Limentani, D.S. Zotkin, Edouard Boos, S. Kananov, R. Hori, R. J. Nowak, U. Karshon, I. Kadenko, D. Szuba, C. D. Catterall, J. Tomaszewska, I. Singh, Thomas Schörner-Sadenius, Y. Yamazaki, L. M. Shcheglova, Y. Aushev, O. Turkot, N. Kovalchuk, Olaf Behnke, O. Shkola, L. Stanco, Marcella Capua, Peter Bussey, G. D'Agostini, O. Gogota, N. Zhmak, Gy. Wolf, T. Kanno, R. Brugnera, Kerstin Borras, N.S. Pokrovskiy, B. Foster, S. Dusini, G. Hartner, K. Nagano, J. Schwartz, W. B. Schmidke, E. Lohrmann, R. Klanner, Amanda Cooper-Sarkar, L. K. Gladilin, R. K. Dementiev, Halina Abramowicz, I. Gregor, A.S. Proskuryakov, Achim Geiser, J. Sztuk-Dambietz, S. Antonelli, Orel Gueta, Andrii Verbytskyi, Marta Ruspa, Vladyslav Libov, Ian Brock, Matthew Wing, P. Roloff, T. Temiraliev, I. Makarenko, Y. Iga, B.O. Zhautykov, Aharon Levy, A. Garfagnini, D. Hochman, I. Rubinsky, Ingo Bloch, Mariusz Przybycien, M. Corradi, O. Viazlo, A. Trofymov, Marcin Pawel Guzik, U. Schneekloth, R. Aggarwal, M. Kuze, Grzegorz Gach, University of Warsaw, Faculty of Physics, and Łódź University

Subjects
perturbation theory [quantum chromodynamics], Particle physics, Nuclear and High Energy Physics, Photon, Astrophysics::High Energy Astrophysical Phenomena, HERA, ZEUS, FOS: Physical sciences, rapidity dependence, High Energy Physics - Experiment, isolated production [photon], Nuclear physics, High Energy Physics - Experiment (hep-ex), measured [differential cross section], photoproduction [photon], ddc:530, associated production [jet], Nuclear Experiment, 318 GeV-cms, Physics, Jet (fluid), ZEUS (particle detector), Luminosity (scattering theory), interaction [electron p], Deep inelastic scattering, DESY HERA Stor, Transverse plane, Pseudorapidity, dependence [transverse energy], High Energy Physics::Experiment, 1 [higher-order], experimental results
Abstract

The photoproduction of isolated photons, both inclusive and together with a jet, has been measured with the ZEUS detector at HERA using an integrated luminosity of $374\, \mathrm{pb}^{-1}$. Differential cross sections are presented in the isolated-photon transverse-energy and pseudorapidity ranges $6 < E_T^��< 15$ GeV and $-0.7 < ��^��< 0.9,$ and for jet transverse-energy and pseudorapidity ranges $4 < E_T^{jet} < 35$ GeV and $-1.5 < ��^{jet} < 1.8,$ for exchanged-photon virtualities $Q^2 < 1$ GeV$^2$. Differential cross sections are also presented for inclusive isolated-photon production as functions of the transverse energy and pseudorapidity of the photon. Higher-order theoretical calculations are compared to the results., 19 pages, 7 figures. Small changes in published version

Published
2014

3. Further studies of the photoproduction of isolated photons with a jet at HERA

Author

E. Lobodzinska, Uta Klein, Thomas Schörner-Sadenius, Marcella Capua, Ada Solano, V. Bokhonov, G. D'Agostini, A. N. Barakbaev, M. Kuze, L. M. Shcheglova, S. Limentani, O. Gogota, E. Lohrmann, J. Szuba, Robert Klanner, A. Stern, O. Kononenko, I. Singh, N. Zhmak, Gy. Wolf, T. Kanno, O. Bachynska, Olaf Behnke, F. Mohamad Idris, Achim Geiser, Grzegorz Gach, V. Aushev, K. Wichmann, M. Adamus, Hanno Perrey, James Ferrando, I. Gregor, L. Stanco, O. Yu. Lukina, Allen Caldwell, A. Garfagnini, A. Trofymov, N. Kondrashova, Zainol Abidin Ibrahim, Yu. Onishchuk, T. Tymieniecka, U. Kötz, B. B. Levchenko, S. Bhadra, V. Samojlov, W. A. T. Wan Abdullah, R. Shevchenko, A. Longhin, B. Löhr, R. J. Nowak, Masaki Ishitsuka, A. Nigro, J. Maeda, S. Antonelli, V. Myronenko, Mariusz Przybycien, M. Corradi, O. Viazlo, W. B. Schmidke, J. F. Martin, D. Notz, Francois Corriveau, Leszek Adamczyk, R.C.E. Devenish, A. Kotański, N.S. Pokrovskiy, D.S. Zotkin, T. Temiraliev, C. D. Catterall, Ganna Dolinska, Robert Ciesielski, I. Abt, Marco Schioppa, T. Tsurugai, B.O. Zhautykov, Sebastian Mergelmeyer, W. Perlanski, O. Shkola, B. Foster, S. Dusini, Ozan Arslan, K. Olkiewicz, Marcin Pawel Guzik, U. Schneekloth, W. Hain, J. Tomaszewska, N. Stefaniuk, Edouard Boos, R. Aggarwal, Wolfgang Lohmann, B. Brzozowska, R. Hori, I. Makarenko, A. Raval, Y. Iga, K. Mujkic, I. Rubinsky, Ingo Bloch, A.S. Proskuryakov, L. K. Gladilin, R. K. Dementiev, I. O. Skillicorn, D. Szuba, Takuya Nobe, G. Hartner, Katsuo Tokushuku, V. Drugakov, W. Słomiński, Ulf Behrens, Amanda Cooper-Sarkar, Y. Aushev, Lev Khein, R. Brugnera, H. Kowalski, D. Lontkovskyi, N. Kovalchuk, J. Schwartz, S. Kananov, Kerstin Borras, Halina Abramowicz, Peter Bussey, V. Trusov, G. Grzelak, J. Behr, S. Yamada, Janusz Chwastowski, O. Kuprash, Jan Figiel, F. Januschek, A. Iudin, M. Lisovyi, A. Bruni, Nazar Bartosik, Enrico Tassi, J. Ciborowski, Manjit Kaur, Yu. A. Golubkov, E. Paul, J. Malka, Roman Walczak, J. Sztuk-Dambietz, O. Turkot, Andrii Gizhko, A. Bertolin, U. Karshon, L. Zawiejski, M. Turcato, Kunihiro Nagano, Yuji Yamazaki, P. Kaur, I. Kadenko, Alexander Spiridonov, Danuta Kisielewska, Ie. Korol, T. P. Stewart, Valentina Sola, I. A. Korzhavina, Matthew Wing, N. Zakharchuk, Philipp Roloff, P. Stopa, O. Zenaiev, Aleksander Filip Żarnecki, J. Grebenyuk, D. Hochman, Orel Gueta, Andrii Verbytskyi, Marta Ruspa, Aharon Levy, Vladyslav Libov, Ian Brock, D. H. Saxon, University of Warsaw, Faculty of Physics, and Lódz University

Subjects
Particle physics, Nuclear and High Energy Physics, Photon, Astrophysics::High Energy Astrophysical Phenomena, HERA, ZEUS, Lepton-Nucleon Scattering, FOS: Physical sciences, measured [cross section], Photon energy, 7. Clean energy, High Energy Physics - Experiment, rapidity dependence, energy dependence, Nuclear physics, isolated production [photon], High Energy Physics - Experiment (hep-ex), photoproduction [photon], ddc:530, associated production [jet], Nuclear Experiment, Monte Carlo, 318 GeV-cms, Quantum chromodynamics, Physics, Jet (fluid), ZEUS (particle detector), Luminosity (scattering theory), angular correlation, QCD, DESY HERA Stor, difference [rapidity], Pseudorapidity, Photon production, deep inelastic scattering [electron p], dependence [transverse energy], High Energy Physics::Experiment, experimental results
Abstract

In this extended analysis using the ZEUS detector at HERA, the photoproduction of isolated photons together with a jet is measured for different ranges of the fractional photon energy, $x_��^{\mathrm{meas}}$, contributing to the photon-jet final state. Cross sections are evaluated in the photon transverse-energy and pseudorapidity ranges $6 < E_T^�� < 15$ GeV and $-0.7 < ��^�� < 0.9$, and for jet transverse-energy and pseudorapidity ranges $4 < E_T^{\rm jet} < 35$ GeV and $-1.5 < ��^{\rm jet} < 1.8$, for an integrated luminosity of 374 $\mathrm{pb}^{-1}$. The kinematic observables studied comprise the transverse energy and pseudorapidity of the photon and the jet, the azimuthal difference between them, the fraction of proton energy taking part in the interaction, and the difference between the pseudorapidities of the photon and the jet. Higher-order theoretical calculations are compared to the results., 26 pages, 7 figures. Updated with small corrections from journal referee and journal reference

Published
2014

4. Diffractive production of high $p_t$ photons at a future linear collider

Author

Evanson, Norman G. and Forshaw, Jeffrey R.

Subjects
transverse momentum: high, cross section, 1000 GeV-cms [500], inelastic scattering [electron positron], Astrophysics::High Energy Astrophysical Phenomena, talk: Obernai 1999/10/16, diffraction, electron positron: inelastic scattering, photon: photoproduction, electron positron: colliding beams, backscatter: laser, inclusive reaction [photon photon], photon photon: inclusive reaction, photon: electroproduction, high [transverse momentum], photoproduction [photon], colliding beams [electron positron], High Energy Physics::Experiment, electroproduction [photon], 500: 1000 GeV-cms, numerical calculations, laser [backscatter], Obernai 1999/10/16 [talk], Particle Physics - Phenomenology
Abstract

5 pp. (1999)., We examine the prospects for studying the diffractive production of high $p_t$ photons in the process $\gamma+\gamma -> \gamma+X$ at a future linear collider operating in both ee and gamma-gamma modes. The high luminosity associated with a linear collider make it the ideal place to measure this process.

Published
1999
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