Studies of the diffractive photoproduction of isolated photons at HERA

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

doi:10.1103/PhysRevD.96.032006

Studies of the diffractive photoproduction of isolated photons at HERA

H. Abramowicz
, I. Abt
, L. Adamczyk
, M. Adamus
, S. Antonelli
, V. Aushev
, Y. Aushev
, O. Behnke
, U. Behrens
, A. Bertolin
, I. Bloch
, I. Brock
, N. H. Brook
, R. Brugnera
, A. Bruni
, P. J. Bussey
, A. Caldwell
, M. Capua
, C. D. Catterall
, J. Chwastowski

J. Ciborowski, R. Ciesielski, A. M. Cooper-Sarkar, M. Corradi, R. K. Dementiev, R. C.E. Devenish, S. Dusini, B. Foster, G. Gach, E. Gallo, A. Garfagnini, A. Geiser, A. Gizhko, L. K. Gladilin, Yu A. Golubkov, G. Grzelak, M. Guzik, C. Gwenlan, O. Hlushchenko, D. Hochman, R. Hori, Z. A. Ibrahim, Y. Iga, M. Ishitsuka, N. Z. Jomhari, I. Kadenko, S. Kananov, U. Karshon, P. Kaur, D. Kisielewska, R. Klanner, U. Klein, I. A. Korzhavina, A. Kotański, N. Kovalchuk, H. Kowalski, B. Krupa, O. Kuprash, M. Kuze, B. B. Levchenko, A. Levy, M. Lisovyi, E. Lobodzinska, B. Löhr, E. Lohrmann, A. Longhin, O. Yu Lukina, J. Malka, A. Mastroberardino, F. Mohamad Idris, N. Mohammad Nasir, V. Myronenko, K. Nagano, Yu Onishchuk, E. Paul, W. Perlański, N. S. Pokrovskiy, A. Polini, M. Przybycień, M. Ruspa, D. H. Saxon, M. Schioppa, U. Schneekloth, T. Schörner-Sadenius, L. M. Shcheglova, O. Shkola, Yu Shyrma, I. O. Skillicorn, W. Slomiński, A. Solano, L. Stanco, N. Stefaniuk, A. Stern, P. Stopa, J. Sztuk-Dambietz, E. Tassi, K. Tokushuku, J. Tomaszewska, T. Tsurugai, M. Turcato, O. Turkot, T. Tymieniecka, A. Verbytskyi, W. A.T. Wan Abdullah, K. Wichmann, M. Wing, S. Yamada, Y. Yamazaki, A. F. Zarnecki, L. Zawiejski, O. Zenaiev, B. O. Zhautykov

Department of Health Sciences

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

Abstract

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^γ < 15 GeV and -0.7 < η^γ < 0.9, inclusively, and also with a jet with transverse energy and pseudorapidity in the ranges 4 < E_T^jet < 35 GeV and -1.5 < η^jet < 1.8, using a total integrated electronproton 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 _ℙ^meas > 0.9, where z _ℙ^meas is the fraction of the longitudinal momentum of the colorless "Pomeron" exchange that is transferred to the photon-jet final state, giving evidence for direct Pomeron interactions.

Original language	English
Article number	032006
Journal	Physical Review D
Volume	96
Issue number	3
DOIs	https://doi.org/10.1103/PhysRevD.96.032006
Publication status	Published - 1 Aug 2017

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10.1103/PhysRevD.96.032006

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Abramowicz, H., Abt, I., Adamczyk, L., Adamus, M., Antonelli, S., Aushev, V., Aushev, Y., Behnke, O., Behrens, U., Bertolin, A., Bloch, I., Brock, I., Brook, N. H., Brugnera, R., Bruni, A., Bussey, P. J., Caldwell, A., Capua, M., Catterall, C. D., ... Zhautykov, B. O. (2017). Studies of the diffractive photoproduction of isolated photons at HERA. Physical Review D, 96(3), Article 032006. https://doi.org/10.1103/PhysRevD.96.032006

@article{558cc082419e4607aa4abb19e9b74dca,

title = "Studies of the diffractive photoproduction of isolated photons at HERA",

abstract = "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 < ETγ < 15 GeV and -0.7 < ηγ < 0.9, inclusively, and also with a jet with transverse energy and pseudorapidity in the ranges 4 < ETjet < 35 GeV and -1.5 < ηjet < 1.8, using a total integrated electronproton 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 ℙmeas > 0.9, where z ℙmeas is the fraction of the longitudinal momentum of the colorless {"}Pomeron{"} exchange that is transferred to the photon-jet final state, giving evidence for direct Pomeron interactions.",

author = "H. Abramowicz and I. Abt and L. Adamczyk and M. Adamus and S. Antonelli and V. Aushev and Y. Aushev and O. Behnke and U. Behrens and A. Bertolin and I. Bloch and I. Brock and Brook, \{N. H.\} and R. Brugnera and A. Bruni and Bussey, \{P. J.\} and A. Caldwell and M. Capua and Catterall, \{C. D.\} and J. Chwastowski and J. Ciborowski and R. Ciesielski and Cooper-Sarkar, \{A. M.\} and M. Corradi and Dementiev, \{R. K.\} and Devenish, \{R. C.E.\} and S. Dusini and B. Foster and G. Gach and E. Gallo and A. Garfagnini and A. Geiser and A. Gizhko and Gladilin, \{L. K.\} and Golubkov, \{Yu A.\} and G. Grzelak and M. Guzik and C. Gwenlan and O. Hlushchenko and D. Hochman and R. Hori and Ibrahim, \{Z. A.\} and Y. Iga and M. Ishitsuka and Jomhari, \{N. Z.\} and I. Kadenko and S. Kananov and U. Karshon and P. Kaur and D. Kisielewska and R. Klanner and U. Klein and Korzhavina, \{I. A.\} and A. Kota{\'n}ski and N. Kovalchuk and H. Kowalski and B. Krupa and O. Kuprash and M. Kuze and Levchenko, \{B. B.\} and A. Levy and M. Lisovyi and E. Lobodzinska and B. L{\"o}hr and E. Lohrmann and A. Longhin and Lukina, \{O. Yu\} and J. Malka and A. Mastroberardino and \{Mohamad Idris\}, F. and \{Mohammad Nasir\}, N. and V. Myronenko and K. Nagano and Yu Onishchuk and E. Paul and W. Perla{\'n}ski and Pokrovskiy, \{N. S.\} and A. Polini and M. Przybycie{\'n} and M. Ruspa and Saxon, \{D. H.\} and M. Schioppa and U. Schneekloth and T. Sch{\"o}rner-Sadenius and Shcheglova, \{L. M.\} and O. Shkola and Yu Shyrma and Skillicorn, \{I. O.\} and W. Slomi{\'n}ski and A. Solano and L. Stanco and N. Stefaniuk and A. Stern and P. Stopa and J. Sztuk-Dambietz and E. Tassi and K. Tokushuku and J. Tomaszewska and T. Tsurugai and M. Turcato and O. Turkot and T. Tymieniecka and A. Verbytskyi and \{Wan Abdullah\}, \{W. A.T.\} and K. Wichmann and M. Wing and S. Yamada and Y. Yamazaki and Zarnecki, \{A. F.\} and L. Zawiejski and O. Zenaiev and Zhautykov, \{B. O.\}",

note = "Funding Information: N. K., E. L., J. S., and M. T. were supported by the German Federal Ministry for Education and Research (BMBF), under Contract No. 05h09GUF, and the SFB 676 of the Deutsche Forschungsgemeinschaft (DFG). R. H., K. N., K. T., S. Y., Y. Y., T. T., Y. I., M.I., and M.K. were supported by the Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT) and its grants for Scientific Research. R. K. D., L. K. G., Yu. A. G., I. A. K., B. B. L., O. Yu. L., and L. M. S. were partially supported by RF Presidential Grant No. NSh-7989.2016.2. H. A., S. K., A. L., and A. S. were supported by the Israel Science Foundation. C. D. C. was supported by the Natural Sciences and Engineering Research Council of Canada (NSERC). B. F., V. M., O. T., and K. W. were supported by the Alexander von Humboldt Foundation. M. W. was also supported by DESY and the Alexander von Humboldt Foundation. Funding Information: for providing invaluable assistance with the use of RAPGAP. S. A., A. B., M. C., A. P., M. C., A. M., M. S., E. T., A. B., S. D., A. L., L. S., R. B., A. G., A. S., and M. R. were supported by the Italian National Institute for Nuclear Physics (INFN). I. B. and E. P. were supported by the German Federal Ministry for Education and Research (BMBF), under Contract No. 05 H09PDF. Z. A. I., N. Z. J., F. M., N. M., and W. A. T. W. were supported by High Impact Research (HIR) Grant No. UM.C/625/1/HIR/ 149 and University Malaya Research Grant (UMRG) Grants No. RU006-2013, No. RP012A-13AFR and No. RP012B-13AFR from Universiti Malaya, and Exploratory Research Grant Scheme (ERGS) Grant No. ER004-2012A from the Ministry of Education, Malaysia. P. J. B., D. H. S., I. O. S., A. M. C., R. C. E. D., C. G., N. H. B., and M. W. were supported by the Science and Technology Facilities Council, UK. B. F., E. G., R. K.,",

year = "2017",

month = aug,

day = "1",

doi = "10.1103/PhysRevD.96.032006",

language = "English",

volume = "96",

journal = "Physical Review D",

issn = "2470-0010",

publisher = "American Physical Society",

number = "3",

}

Abramowicz, H, Abt, I, Adamczyk, L, Adamus, M, Antonelli, S, Aushev, V, Aushev, Y, Behnke, O, Behrens, U, Bertolin, A, Bloch, I, Brock, I, Brook, NH, Brugnera, R, Bruni, A, Bussey, PJ, Caldwell, A, Capua, M, Catterall, CD, Chwastowski, J, Ciborowski, J, Ciesielski, R, Cooper-Sarkar, AM, Corradi, M, Dementiev, RK, Devenish, RCE, Dusini, S, Foster, B, Gach, G, Gallo, E, Garfagnini, A, Geiser, A, Gizhko, A, Gladilin, LK, Golubkov, YA, Grzelak, G, Guzik, M, Gwenlan, C, Hlushchenko, O, Hochman, D, Hori, R, Ibrahim, ZA, Iga, Y, Ishitsuka, M, Jomhari, NZ, Kadenko, I, Kananov, S, Karshon, U, Kaur, P, Kisielewska, D, Klanner, R, Klein, U, Korzhavina, IA, Kotański, A, Kovalchuk, N, Kowalski, H, Krupa, B, Kuprash, O, Kuze, M, Levchenko, BB, Levy, A, Lisovyi, M, Lobodzinska, E, Löhr, B, Lohrmann, E, Longhin, A, Lukina, OY, Malka, J, Mastroberardino, A, Mohamad Idris, F, Mohammad Nasir, N, Myronenko, V, Nagano, K, Onishchuk, Y, Paul, E, Perlański, W, Pokrovskiy, NS, Polini, A, Przybycień, M, Ruspa, M, Saxon, DH, Schioppa, M, Schneekloth, U, Schörner-Sadenius, T, Shcheglova, LM, Shkola, O, Shyrma, Y, Skillicorn, IO, Slomiński, W, Solano, A, Stanco, L, Stefaniuk, N, Stern, A, Stopa, P, Sztuk-Dambietz, J, Tassi, E, Tokushuku, K, Tomaszewska, J, Tsurugai, T, Turcato, M, Turkot, O, Tymieniecka, T, Verbytskyi, A, Wan Abdullah, WAT, Wichmann, K, Wing, M, Yamada, S, Yamazaki, Y, Zarnecki, AF, Zawiejski, L, Zenaiev, O & Zhautykov, BO 2017, 'Studies of the diffractive photoproduction of isolated photons at HERA', Physical Review D, vol. 96, no. 3, 032006. https://doi.org/10.1103/PhysRevD.96.032006

TY - JOUR

T1 - Studies of the diffractive photoproduction of isolated photons at HERA

AU - Abramowicz, H.

AU - Abt, I.

AU - Adamczyk, L.

AU - Adamus, M.

AU - Antonelli, S.

AU - Aushev, V.

AU - Aushev, Y.

AU - Behnke, O.

AU - Behrens, U.

AU - Bertolin, A.

AU - Bloch, I.

AU - Brock, I.

AU - Brook, N. H.

AU - Brugnera, R.

AU - Bruni, A.

AU - Bussey, P. J.

AU - Caldwell, A.

AU - Capua, M.

AU - Catterall, C. D.

AU - Chwastowski, J.

AU - Ciborowski, J.

AU - Ciesielski, R.

AU - Cooper-Sarkar, A. M.

AU - Corradi, M.

AU - Dementiev, R. K.

AU - Devenish, R. C.E.

AU - Dusini, S.

AU - Foster, B.

AU - Gach, G.

AU - Gallo, E.

AU - Garfagnini, A.

AU - Geiser, A.

AU - Gizhko, A.

AU - Gladilin, L. K.

AU - Golubkov, Yu A.

AU - Grzelak, G.

AU - Guzik, M.

AU - Gwenlan, C.

AU - Hlushchenko, O.

AU - Hochman, D.

AU - Hori, R.

AU - Ibrahim, Z. A.

AU - Iga, Y.

AU - Ishitsuka, M.

AU - Jomhari, N. Z.

AU - Kadenko, I.

AU - Kananov, S.

AU - Karshon, U.

AU - Kaur, P.

AU - Kisielewska, D.

AU - Klanner, R.

AU - Klein, U.

AU - Korzhavina, I. A.

AU - Kotański, A.

AU - Kovalchuk, N.

AU - Kowalski, H.

AU - Krupa, B.

AU - Kuprash, O.

AU - Kuze, M.

AU - Levchenko, B. B.

AU - Levy, A.

AU - Lisovyi, M.

AU - Lobodzinska, E.

AU - Löhr, B.

AU - Lohrmann, E.

AU - Longhin, A.

AU - Lukina, O. Yu

AU - Malka, J.

AU - Mastroberardino, A.

AU - Mohamad Idris, F.

AU - Mohammad Nasir, N.

AU - Myronenko, V.

AU - Nagano, K.

AU - Onishchuk, Yu

AU - Paul, E.

AU - Perlański, W.

AU - Pokrovskiy, N. S.

AU - Polini, A.

AU - Przybycień, M.

AU - Ruspa, M.

AU - Saxon, D. H.

AU - Schioppa, M.

AU - Schneekloth, U.

AU - Schörner-Sadenius, T.

AU - Shcheglova, L. M.

AU - Shkola, O.

AU - Shyrma, Yu

AU - Skillicorn, I. O.

AU - Slomiński, W.

AU - Solano, A.

AU - Stanco, L.

AU - Stefaniuk, N.

AU - Stern, A.

AU - Stopa, P.

AU - Sztuk-Dambietz, J.

AU - Tassi, E.

AU - Tokushuku, K.

AU - Tomaszewska, J.

AU - Tsurugai, T.

AU - Turcato, M.

AU - Turkot, O.

AU - Tymieniecka, T.

AU - Verbytskyi, A.

AU - Wan Abdullah, W. A.T.

AU - Wichmann, K.

AU - Wing, M.

AU - Yamada, S.

AU - Yamazaki, Y.

AU - Zarnecki, A. F.

AU - Zawiejski, L.

AU - Zenaiev, O.

AU - Zhautykov, B. O.

N1 - Funding Information: N. K., E. L., J. S., and M. T. were supported by the German Federal Ministry for Education and Research (BMBF), under Contract No. 05h09GUF, and the SFB 676 of the Deutsche Forschungsgemeinschaft (DFG). R. H., K. N., K. T., S. Y., Y. Y., T. T., Y. I., M.I., and M.K. were supported by the Japanese Ministry of Education, Culture, Sports, Science and Technology (MEXT) and its grants for Scientific Research. R. K. D., L. K. G., Yu. A. G., I. A. K., B. B. L., O. Yu. L., and L. M. S. were partially supported by RF Presidential Grant No. NSh-7989.2016.2. H. A., S. K., A. L., and A. S. were supported by the Israel Science Foundation. C. D. C. was supported by the Natural Sciences and Engineering Research Council of Canada (NSERC). B. F., V. M., O. T., and K. W. were supported by the Alexander von Humboldt Foundation. M. W. was also supported by DESY and the Alexander von Humboldt Foundation. Funding Information: for providing invaluable assistance with the use of RAPGAP. S. A., A. B., M. C., A. P., M. C., A. M., M. S., E. T., A. B., S. D., A. L., L. S., R. B., A. G., A. S., and M. R. were supported by the Italian National Institute for Nuclear Physics (INFN). I. B. and E. P. were supported by the German Federal Ministry for Education and Research (BMBF), under Contract No. 05 H09PDF. Z. A. I., N. Z. J., F. M., N. M., and W. A. T. W. were supported by High Impact Research (HIR) Grant No. UM.C/625/1/HIR/ 149 and University Malaya Research Grant (UMRG) Grants No. RU006-2013, No. RP012A-13AFR and No. RP012B-13AFR from Universiti Malaya, and Exploratory Research Grant Scheme (ERGS) Grant No. ER004-2012A from the Ministry of Education, Malaysia. P. J. B., D. H. S., I. O. S., A. M. C., R. C. E. D., C. G., N. H. B., and M. W. were supported by the Science and Technology Facilities Council, UK. B. F., E. G., R. K.,

PY - 2017/8/1

Y1 - 2017/8/1

N2 - 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 < ETγ < 15 GeV and -0.7 < ηγ < 0.9, inclusively, and also with a jet with transverse energy and pseudorapidity in the ranges 4 < ETjet < 35 GeV and -1.5 < ηjet < 1.8, using a total integrated electronproton 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 ℙmeas > 0.9, where z ℙmeas is the fraction of the longitudinal momentum of the colorless "Pomeron" exchange that is transferred to the photon-jet final state, giving evidence for direct Pomeron interactions.

AB - 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 < ETγ < 15 GeV and -0.7 < ηγ < 0.9, inclusively, and also with a jet with transverse energy and pseudorapidity in the ranges 4 < ETjet < 35 GeV and -1.5 < ηjet < 1.8, using a total integrated electronproton 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 ℙmeas > 0.9, where z ℙmeas is the fraction of the longitudinal momentum of the colorless "Pomeron" exchange that is transferred to the photon-jet final state, giving evidence for direct Pomeron interactions.

UR - https://www.scopus.com/pages/publications/85033228132

U2 - 10.1103/PhysRevD.96.032006

DO - 10.1103/PhysRevD.96.032006

M3 - Article

SN - 2470-0010

VL - 96

JO - Physical Review D

JF - Physical Review D

IS - 3

M1 - 032006

ER -

Studies of the diffractive photoproduction of isolated photons at HERA

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