Further studies of isolated photon production with a jet in deep inelastic scattering at HERA

Abramowicz, H.; Brugnera, R.; Brook, NH; Lohrmann, E.; Ishitsuka, M.; Bruni, A.; Abt, I.; Kotański, A.; Bertolin, A.; Behrens, U.; Tomaszewska, J.; Dementiev, RK; Polini, A.; Klein, U.; Stefaniuk, N.; Golubkov, Yu A; Grzelak, G.; Adamczyk, L.; Löhr, B.; Kaur, P.; Kuprash, O.; Zhautykov, BO; Hochman, D.; Stanco, L.; Kuze, M.; Schneekloth, U.; Hori, R.; Dusini, S.; Lobodzinska, E.; Kowalski, H.; Gwenlan, C.; Tymieniecka, T.; Shcheglova, LM; Cooper-Sarkar, AM; Kisielewska, D.; Paul, E.; Aggarwal, R.; Pokrovskiy, NS; Mohammad Nasir, N.; Garfagnini, A.; Klanner, R.; Wan Abdullah, WAT; Perlański, W.; Onishchuk, Yu; Ciborowski, J.; Guzik, M.; Capua, M.; Jomhari, NZ; Żarnecki, AF; ZEUS Collaboration; Bloch, I.; Caldwell, A.; Stern, A.; Lukina, OYu; Krupa, B.; Skillicorn, IO; Devenish, RCE; Tsurugai, T.; Yamazaki, Y.; Ciesielski, R.; Schioppa, M.; Karshon, U.; Tassi, E.; Korzhavina, IA; Yamada, S.; Hlushchenko, O.; Mastroberardino, A.; Myronenko, V.; Słomiński, W.; Kananov, S.; Iga, Y.; Przybycien, M.; Catterall, CD; Chwastowski, J.; Turkot, O.; Corradi, M.; Gladilin, LK; Sztuk-Dambietz, J.; Solano, A.; Zenaiev, O.; Wichmann, K.; Stopa, P.; Malka, J.; Wing, M.; Lisovyi, M.; Kadenko, I.; Levchenko, BB; Kovalchuk, N.; Saxon, DH; Adamus, M.; Gizhko, A.; Behnke, O.; Longhin, A.; Zawiejski, L.; Nagano, K.; Gallo, E.; Antonelli, S.; Bussey, PJ; Ibrahim, ZA; Foster, B.; Gach, G.; Shkola, O.; Brock, I.; Verbytskyi, A.; Aushev, V.; Geiser, A.; Schörner-Sadenius, T.; Shyrma, Yu; Ruspa, M.; Turcato, M.; Tokushuku, K.; Mohamad Idris, F.; Levy, A.; Aushev, Y.

Preprint/Report

PUBDB-2017-13434

Further studies of isolated photon production with a jet in deep inelastic scattering at HERA

Abramowicz, H. ; Abt, I. ; Adamczyk, L.Extern* ; Adamus, M.Extern* ; Antonelli, S. ; Aushev, V.Extern* ; Behnke, O.DESY* ; Behrens, U.DESY* ; Bertolin, A. ; Bloch, I.DESY* ; Brock, I. ; Brook, N. ; Brugnera, R. ; Bruni, A. ; Bussey, P. ; Caldwell, A. ; Capua, M. ; Catterall, C. ; Chwastowski, J. ; Ciborowski, J. ; Ciesielski, R. ; Cooper-Sarkar, A. ; Corradi, M. ; Dementiev, R. ; Devenish, R. ; Dusini, S. ; Foster, B. ; Gach, G. ; Gallo, E.DESY* ; Garfagnini, A. ; Geiser, A.DESY* ; Gizhko, A.DESY* ; Gladilin, L. ; Golubkov, Y. A. ; Grzelak, G. ; Guzik, M. ; Hochman, D. ; Hori, R. ; Ibrahim, Z. ; Iga, Y. ; Ishitsuka, M. ; Jomhari, N. ; Kadenko, I. ; Kananov, S. ; Karshon, U.Extern* ; Kaur, P. ; Aggarwal, R. ; Kisielewska, D.Extern* ; Klanner, R.Extern* ; Klein, U. ; Korzhavina, I.Extern* ; Kotański, A.Extern* ; Kovalchuk, N. ; Kowalski, H.Extern* ; Krupa, B. ; Kuprash, O.DESY* ; Kuze, M. ; Levchenko, B.Extern* ; Levy, A. ; Lisovyi, M.Extern* ; Lobodzinska, E. ; Löhr, B.DESY* ; Lohrmann, E.Extern* ; Longhin, A. ; Lukina, O.Extern* ; Malka, J. ; Mohamad Idris, F. ; Mohammad Nasir, N. ; Myronenko, V.DESY* ; Nagano, K. ; Onishchuk, Y. ; Paul, E. ; Perlański, W. ; Pokrovskiy, N. ; Przybycien, M. ; Ruspa, M. ; Saxon, D. ; Schioppa, M. ; Schneekloth, U.DESY* ; Schörner-Sadenius, T.DESY* ; Shcheglova, L.Extern* ; Shkola, O.Extern* ; Shyrma, Y.Extern* ; Skillicorn, I. ; Słomiński, W. ; Solano, A. ; Stanco, L. ; Stefaniuk, N. ; Stern, A. ; Stopa, P. ; Sztuk-Dambietz, J.XFEL.EU* ; Tassi, E. ; Tokushuku, K. ; Tomaszewska, J. ; Tsurugai, T. ; Turcato, M. ; Turkot, O. ; Tymieniecka, T. ; Verbytskyi, A.Extern* ; Wan Abdullah, W. ; Wichmann, K. ; Wing, M. ; Yamada, S. ; Yamazaki, Y. ; Żarnecki, A. ; Zawiejski, L. ; Zenaiev, O.DESY* ; Zhautykov, B. ; Gwenlan, C. ; Hlushchenko, O.Extern* ; Polini, A. ; Mastroberardino, A. ; Aushev, Y. ; ZEUS Collaboration (Collaboration author)DESY*

2017

[10.3204/PUBDB-2017-13434]

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Please use a persistent id in citations: doi:10.3204/PUBDB-2017-13434

Report No.: DESY-17-212; arXiv:1712.04273

Abstract: Isolated photons with high transverse energy have been studied in deep inelastic $ep$ scattering with the ZEUS detector at HERA, using an integrated luminosity of 326 pb$^{−1}$ in the range of exchanged-photon virtuality 10−350 GeV$^2$. Outgoing isolated photons with transverse energy 4 $E^{γ}_{T}$ < 15 GeV and pseudorapidity −0.7 < $η^γ$ < 0.9 were measured with accompanying jets having transverse energy and pseudorapidity 2.5 $E^{jet}_{T}$ < 35 GeV and −1.5 < $η^{jet}$ < 1.8, respectively. Differential cross sections are presented for the following variables: the fraction of the incoming photon energy and momentum that is transferred to the outgoing photon and the leading jet; the fraction of the incoming proton energy transferred to the photon and leading jet; the differences in azimuthal angle and pseudorapidity between the outgoing photon and the leading jet and between the outgoing photon and the scattered electron. Comparisons are made with theoretical predictions: a leading-logarithm Monte Carlo simulation, a next-to-leading-order QCD prediction, and a prediction using the $k_T$-factorisation approach

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