The exclusive photoproduction reactions γp → J/ψ(1S)p and γp → ψ(2S)p have been measured at an ep centre-of-mass energy of 318 GeV with the ZEUS detector at HERA using an integrated luminosity of 373 pb −1. The measurement was made in the kinematic range 30 < W < 180 GeV, Q 2 < 1 GeV2 and |t| < 1 GeV2, where W is the photon-proton centre-of-mass energy, Q 2 is the photon virtuality and t is the squared four-momentum transfer at the proton vertex. The decay channels used were J/ψ(1S) → μ + μ − , ψ(2S) → μ + μ − and ψ(2S) → J/ψ(1S)π + π − with subsequent decay J/ψ(1S) → μ + μ − . The ratio of the production cross sections, R = σ ψ(2S) /σ J/ψ(1S), has been measured as a function of W and |t| and compared to previous data in photoproduction and deep inelastic scattering and with predictions of QCD-inspired models of exclusive vector-meson production, which are in reasonable agreement with the data.
{
"_oai": {
"updated": "2023-03-26T00:31:30Z",
"id": "oai:repo.scoap3.org:74853",
"sets": [
"JHEP"
]
},
"authors": [
{
"affiliations": [
{
"country": "Germany",
"value": "Max-Planck-Institut f\u00fcr Physik, M\u00fcnchen, Germany",
"organization": "Max-Planck-Institut f\u00fcr Physik"
}
],
"surname": "Abt",
"given_names": "I.",
"full_name": "Abt, I."
},
{
"affiliations": [
{
"country": "Poland",
"value": "National Centre for Nuclear Research, Warsaw, Poland",
"organization": "National Centre for Nuclear Research"
}
],
"surname": "Adamus",
"given_names": "M.",
"full_name": "Adamus, M."
},
{
"affiliations": [
{
"country": "India",
"value": "DST-Inspire Faculty, Department of Technology, SPPU, Pune, India",
"organization": "DST-Inspire Faculty, Department of Technology, SPPU"
}
],
"surname": "Aggarwal",
"given_names": "R.",
"full_name": "Aggarwal, R."
},
{
"affiliations": [
{
"country": "Ukraine",
"value": "Department of Nuclear Physics, National Taras Shevchenko University of Kyiv, Kyiv, Ukraine",
"organization": "Department of Nuclear Physics, National Taras Shevchenko University of Kyiv"
}
],
"surname": "Aushev",
"given_names": "V.",
"full_name": "Aushev, V."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany",
"organization": "Deutsches Elektronen-Synchrotron DESY"
}
],
"surname": "Behnke",
"given_names": "O.",
"full_name": "Behnke, O."
},
{
"affiliations": [
{
"country": "Italy",
"value": "INFN Padova, Padova, Italy",
"organization": "INFN Padova"
}
],
"surname": "Bertolin",
"given_names": "A.",
"full_name": "Bertolin, A."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Deutsches Elektronen-Synchrotron DESY, Zeuthen, Germany",
"organization": "Deutsches Elektronen-Synchrotron DESY"
}
],
"surname": "Bloch",
"given_names": "I.",
"full_name": "Bloch, I."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Physikalisches Institut der Universit\u00e4t Bonn, Bonn, Germany",
"organization": "Physikalisches Institut der Universit\u00e4t Bonn"
}
],
"surname": "Brock",
"given_names": "I.",
"full_name": "Brock, I."
},
{
"affiliations": [
{
"country": "UK",
"value": "Physics and Astronomy Department, University College London, London, United Kingdom",
"organization": "University College London"
},
{
"country": "UK",
"value": "University of Bath, Bath, United Kingdom",
"organization": "University of Bath"
}
],
"surname": "Brook",
"given_names": "N.",
"full_name": "Brook, N."
},
{
"affiliations": [
{
"country": "Italy",
"value": "Dipartimento di Fisica e Astronomia dell\u2019 Universit\u00e0 and INFN, Padova, Italy",
"organization": "Dipartimento di Fisica e Astronomia dell\u2019 Universit\u00e0 and INFN"
}
],
"surname": "Brugnera",
"given_names": "R.",
"full_name": "Brugnera, R."
},
{
"affiliations": [
{
"country": "Italy",
"value": "INFN Bologna, Bologna, Italy",
"organization": "INFN Bologna"
}
],
"surname": "Bruni",
"given_names": "A.",
"full_name": "Bruni, A."
},
{
"affiliations": [
{
"country": "UK",
"value": "School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom",
"organization": "University of Glasgow"
}
],
"surname": "Bussey",
"given_names": "P.",
"full_name": "Bussey, P."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Max-Planck-Institut f\u00fcr Physik, M\u00fcnchen, Germany",
"organization": "Max-Planck-Institut f\u00fcr Physik"
}
],
"surname": "Caldwell",
"given_names": "A.",
"full_name": "Caldwell, A."
},
{
"affiliations": [
{
"country": "Canada",
"value": "Department of Physics, York University, Toronto, Ontario, M3J 1P3, Canada",
"organization": "York University"
}
],
"surname": "Catterall",
"given_names": "C.",
"full_name": "Catterall, C."
},
{
"affiliations": [
{
"country": "Poland",
"value": "The Henryk Niewodniczanski Institute of Nuclear Physics, Polish Academy of Sciences, Krakow, Poland",
"organization": "Polish Academy of Sciences"
}
],
"surname": "Chwastowski",
"given_names": "J.",
"full_name": "Chwastowski, J."
},
{
"affiliations": [
{
"country": "Poland",
"value": "Faculty of Physics, University of Warsaw, Warsaw, Poland",
"organization": "University of Warsaw"
},
{
"country": "Poland",
"value": "Lodz University, Lodz, Poland",
"organization": "Lodz University"
}
],
"surname": "Ciborowski",
"given_names": "J.",
"full_name": "Ciborowski, J."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany",
"organization": "Deutsches Elektronen-Synchrotron DESY"
},
{
"country": "USA",
"value": "Rockefeller University, New York, NY, 10065, USA",
"organization": "Rockefeller University"
}
],
"surname": "Ciesielski",
"given_names": "R.",
"full_name": "Ciesielski, R."
},
{
"affiliations": [
{
"country": "UK",
"value": "Department of Physics, University of Oxford, Oxford, United Kingdom",
"organization": "University of Oxford"
}
],
"surname": "Cooper-Sarkar",
"given_names": "A.",
"full_name": "Cooper-Sarkar, A."
},
{
"affiliations": [
{
"country": "Italy",
"value": "INFN Bologna, Bologna, Italy",
"organization": "INFN Bologna"
},
{
"country": "Italy",
"value": "INFN Roma, Rome, Italy",
"organization": "INFN Roma"
}
],
"surname": "Corradi",
"given_names": "M.",
"full_name": "Corradi, M."
},
{
"surname": "Dementiev",
"given_names": "R.",
"full_name": "Dementiev, R."
},
{
"affiliations": [
{
"country": "Italy",
"value": "INFN Padova, Padova, Italy",
"organization": "INFN Padova"
}
],
"surname": "Dusini",
"given_names": "S.",
"full_name": "Dusini, S."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany",
"organization": "Deutsches Elektronen-Synchrotron DESY"
}
],
"surname": "Ferrando",
"given_names": "J.",
"full_name": "Ferrando, J."
},
{
"affiliations": [
{
"country": "UK",
"value": "Department of Physics, University of Oxford, Oxford, United Kingdom",
"organization": "University of Oxford"
},
{
"country": "Germany",
"value": "DESY and University of Hamburg, Hamburg, Germany",
"organization": "DESY and University of Hamburg"
}
],
"surname": "Foster",
"given_names": "B.",
"full_name": "Foster, B."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Hamburg University, Institute of Experimental Physics, Hamburg, Germany",
"organization": "Institute of Experimental Physics"
},
{
"country": "Germany",
"value": "DESY, Hamburg, Germany",
"organization": "DESY"
}
],
"surname": "Gallo",
"given_names": "E.",
"full_name": "Gallo, E."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Physikalisches Institut of the University of Heidelberg, Heidelberg, Germany",
"organization": "Physikalisches Institut of the University of Heidelberg"
},
{
"country": "USA",
"value": "University of Houston, Houston, TX, 77004, USA",
"organization": "University of Houston"
}
],
"surname": "Gangadharan",
"given_names": "D.",
"full_name": "Gangadharan, D."
},
{
"affiliations": [
{
"country": "Italy",
"value": "Dipartimento di Fisica e Astronomia dell\u2019 Universit\u00e0 and INFN, Padova, Italy",
"organization": "Dipartimento di Fisica e Astronomia dell\u2019 Universit\u00e0 and INFN"
}
],
"surname": "Garfagnini",
"given_names": "A.",
"full_name": "Garfagnini, A."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany",
"organization": "Deutsches Elektronen-Synchrotron DESY"
}
],
"surname": "Geiser",
"given_names": "A.",
"full_name": "Geiser, A."
},
{
"affiliations": [
{
"country": "Poland",
"value": "Faculty of Physics, University of Warsaw, Warsaw, Poland",
"organization": "University of Warsaw"
}
],
"surname": "Grzelak",
"given_names": "G.",
"full_name": "Grzelak, G."
},
{
"affiliations": [
{
"country": "UK",
"value": "Department of Physics, University of Oxford, Oxford, United Kingdom",
"organization": "University of Oxford"
}
],
"surname": "Gwenlan",
"given_names": "C.",
"full_name": "Gwenlan, C."
},
{
"affiliations": [
{
"country": "Israel",
"value": "Department of Particle Physics and Astrophysics, Weizmann Institute, Rehovot, Israel",
"organization": "Weizmann Institute"
}
],
"surname": "Hochman",
"given_names": "D.",
"full_name": "Hochman, D."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany",
"organization": "Deutsches Elektronen-Synchrotron DESY"
}
],
"surname": "Jomhari",
"given_names": "N.",
"full_name": "Jomhari, N."
},
{
"affiliations": [
{
"country": "Ukraine",
"value": "Department of Nuclear Physics, National Taras Shevchenko University of Kyiv, Kyiv, Ukraine",
"organization": "Department of Nuclear Physics, National Taras Shevchenko University of Kyiv"
}
],
"surname": "Kadenko",
"given_names": "I.",
"full_name": "Kadenko, I."
},
{
"affiliations": [
{
"country": "Israel",
"value": "Department of Particle Physics and Astrophysics, Weizmann Institute, Rehovot, Israel",
"organization": "Weizmann Institute"
}
],
"surname": "Karshon",
"given_names": "U.",
"full_name": "Karshon, U."
},
{
"affiliations": [
{
"country": "India",
"value": "Sant Longowal Institute of Engineering and Technology, Longowal, Punjab, India",
"organization": "Sant Longowal Institute of Engineering and Technology"
}
],
"surname": "Kaur",
"given_names": "P.",
"full_name": "Kaur, P."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Hamburg University, Institute of Experimental Physics, Hamburg, Germany",
"organization": "Institute of Experimental Physics"
}
],
"surname": "Klanner",
"given_names": "R.",
"full_name": "Klanner, R."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany",
"organization": "Deutsches Elektronen-Synchrotron DESY"
},
{
"country": "UK",
"value": "University of Liverpool, Liverpool, United Kingdom",
"organization": "University of Liverpool"
}
],
"surname": "Klein",
"given_names": "U.",
"full_name": "Klein, U."
},
{
"surname": "Korzhavina",
"given_names": "I.",
"full_name": "Korzhavina, I."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Hamburg University, Institute of Experimental Physics, Hamburg, Germany",
"organization": "Institute of Experimental Physics"
}
],
"surname": "Kovalchuk",
"given_names": "N.",
"full_name": "Kovalchuk, N."
},
{
"affiliations": [
{
"country": "Japan",
"value": "Department of Physics, Tokyo Institute of Technology, Tokyo, Japan",
"organization": "Tokyo Institute of Technology"
}
],
"surname": "Kuze",
"given_names": "M.",
"full_name": "Kuze, M."
},
{
"surname": "Levchenko",
"given_names": "B.",
"full_name": "Levchenko, B."
},
{
"affiliations": [
{
"country": "Israel",
"value": "Raymond and Beverly Sackler Faculty of Exact Sciences, School of Physics, Tel Aviv University, Tel Aviv, Israel",
"organization": "Tel Aviv University"
}
],
"surname": "Levy",
"given_names": "A.",
"full_name": "Levy, A."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany",
"organization": "Deutsches Elektronen-Synchrotron DESY"
}
],
"surname": "L\u00f6hr",
"given_names": "B.",
"full_name": "L\u00f6hr, B."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Hamburg University, Institute of Experimental Physics, Hamburg, Germany",
"organization": "Institute of Experimental Physics"
}
],
"surname": "Lohrmann",
"given_names": "E.",
"full_name": "Lohrmann, E."
},
{
"affiliations": [
{
"country": "Italy",
"value": "Dipartimento di Fisica e Astronomia dell\u2019 Universit\u00e0 and INFN, Padova, Italy",
"organization": "Dipartimento di Fisica e Astronomia dell\u2019 Universit\u00e0 and INFN"
}
],
"surname": "Longhin",
"given_names": "A.",
"full_name": "Longhin, A."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany",
"organization": "Deutsches Elektronen-Synchrotron DESY"
}
],
"surname": "Lorkowski",
"given_names": "F.",
"full_name": "Lorkowski, F."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany",
"organization": "Deutsches Elektronen-Synchrotron DESY"
}
],
"surname": "Makarenko",
"given_names": "I.",
"full_name": "Makarenko, I."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany",
"organization": "Deutsches Elektronen-Synchrotron DESY"
},
{
"country": "Germany",
"value": "European X-ray Free-Electron Laser facility GmbH, Hamburg, Germany",
"organization": "European X-ray Free-Electron Laser facility GmbH"
}
],
"surname": "Malka",
"given_names": "J.",
"full_name": "Malka, J."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Physikalisches Institut of the University of Heidelberg, Heidelberg, Germany",
"organization": "Physikalisches Institut of the University of Heidelberg"
},
{
"country": "Germany",
"value": "GSI Helmholtzzentrum f\u00fcr Schwerionenforschung GmbH, Darmstadt, Germany",
"organization": "GSI Helmholtzzentrum f\u00fcr Schwerionenforschung GmbH"
}
],
"surname": "Masciocchi",
"given_names": "S.",
"full_name": "Masciocchi, S."
},
{
"affiliations": [
{
"country": "Japan",
"value": "Institute of Particle and Nuclear Studies, KEK, Tsukuba, Japan",
"organization": "Institute of Particle and Nuclear Studies, KEK"
}
],
"surname": "Nagano",
"given_names": "K.",
"full_name": "Nagano, K."
},
{
"affiliations": [
{
"country": "USA",
"value": "Department of Physics, Temple University, Philadelphia, PA, 19122, USA",
"organization": "Temple University"
}
],
"surname": "Nam",
"given_names": "J.",
"full_name": "Nam, J."
},
{
"affiliations": [
{
"country": "Ukraine",
"value": "Department of Nuclear Physics, National Taras Shevchenko University of Kyiv, Kyiv, Ukraine",
"organization": "Department of Nuclear Physics, National Taras Shevchenko University of Kyiv"
}
],
"surname": "Onishchuk",
"given_names": "Yu.",
"full_name": "Onishchuk, Yu."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Physikalisches Institut der Universit\u00e4t Bonn, Bonn, Germany",
"organization": "Physikalisches Institut der Universit\u00e4t Bonn"
}
],
"surname": "Paul",
"given_names": "E.",
"full_name": "Paul, E."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Institut f\u00fcr Kernphysik, Goethe Universit\u00e4t, Frankfurt am Main, Germany",
"organization": "Goethe Universit\u00e4t"
}
],
"surname": "Pidhurskyi",
"given_names": "I.",
"full_name": "Pidhurskyi, I."
},
{
"affiliations": [
{
"country": "Italy",
"value": "INFN Bologna, Bologna, Italy",
"organization": "INFN Bologna"
}
],
"surname": "Polini",
"given_names": "A.",
"full_name": "Polini, A."
},
{
"affiliations": [
{
"country": "Poland",
"value": "AGH University of Science and Technology, Faculty of Physics and Applied Computer Science, Krakow, Poland",
"organization": "AGH University of Science and Technology, Faculty of Physics and Applied Computer Science"
}
],
"surname": "Przybycie\u0144",
"given_names": "M.",
"full_name": "Przybycie\u0144, M."
},
{
"affiliations": [
{
"country": "USA",
"value": "Department of Physics, Temple University, Philadelphia, PA, 19122, USA",
"organization": "Temple University"
}
],
"surname": "Quintero",
"given_names": "A.",
"full_name": "Quintero, A."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany",
"organization": "Deutsches Elektronen-Synchrotron DESY"
}
],
"surname": "Rubinsky",
"given_names": "I.",
"full_name": "Rubinsky, I."
},
{
"affiliations": [
{
"country": "Italy",
"value": "Universit\u00e0 del Piemonte Orientale, Novara, and INFN, Torino, Italy",
"organization": "Universit\u00e0 del Piemonte Orientale, Novara, and INFN"
}
],
"surname": "Ruspa",
"given_names": "M.",
"full_name": "Ruspa, M."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany",
"organization": "Deutsches Elektronen-Synchrotron DESY"
}
],
"surname": "Schneekloth",
"given_names": "U.",
"full_name": "Schneekloth, U."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany",
"organization": "Deutsches Elektronen-Synchrotron DESY"
}
],
"surname": "Sch\u00f6rner-Sadenius",
"given_names": "T.",
"full_name": "Sch\u00f6rner-Sadenius, T."
},
{
"affiliations": [
{
"country": "Germany",
"value": "GSI Helmholtzzentrum f\u00fcr Schwerionenforschung GmbH, Darmstadt, Germany",
"organization": "GSI Helmholtzzentrum f\u00fcr Schwerionenforschung GmbH"
}
],
"surname": "Selyuzhenkov",
"given_names": "I.",
"full_name": "Selyuzhenkov, I."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany",
"organization": "Deutsches Elektronen-Synchrotron DESY"
}
],
"surname": "Shchedrolosiev",
"given_names": "M.",
"full_name": "Shchedrolosiev, M."
},
{
"surname": "Shcheglova",
"given_names": "L.",
"full_name": "Shcheglova, L."
},
{
"affiliations": [
{
"country": "UK",
"value": "School of Physics and Astronomy, University of Glasgow, Glasgow, United Kingdom",
"organization": "University of Glasgow"
}
],
"surname": "Skillicorn",
"given_names": "I.",
"full_name": "Skillicorn, I."
},
{
"affiliations": [
{
"country": "Poland",
"value": "Department of Physics, Jagellonian University, Krakow, Poland",
"organization": "Jagellonian University"
}
],
"surname": "S\u0142omi\u0144ski",
"given_names": "W.",
"full_name": "S\u0142omi\u0144ski, W."
},
{
"affiliations": [
{
"country": "Italy",
"value": "Universit\u00e0 di Torino and INFN, Torino, Italy",
"organization": "Universit\u00e0 di Torino and INFN"
}
],
"surname": "Solano",
"given_names": "A.",
"full_name": "Solano, A."
},
{
"affiliations": [
{
"country": "Italy",
"value": "INFN Padova, Padova, Italy",
"organization": "INFN Padova"
}
],
"surname": "Stanco",
"given_names": "L.",
"full_name": "Stanco, L."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany",
"organization": "Deutsches Elektronen-Synchrotron DESY"
}
],
"surname": "Stefaniuk",
"given_names": "N.",
"full_name": "Stefaniuk, N."
},
{
"affiliations": [
{
"country": "USA",
"value": "Department of Physics, Temple University, Philadelphia, PA, 19122, USA",
"organization": "Temple University"
}
],
"surname": "Surrow",
"given_names": "B.",
"full_name": "Surrow, B."
},
{
"affiliations": [
{
"country": "Japan",
"value": "Institute of Particle and Nuclear Studies, KEK, Tsukuba, Japan",
"organization": "Institute of Particle and Nuclear Studies, KEK"
}
],
"surname": "Tokushuku",
"given_names": "K.",
"full_name": "Tokushuku, K."
},
{
"affiliations": [
{
"country": "Poland",
"value": "Faculty of Physics, University of Warsaw, Warsaw, Poland",
"organization": "University of Warsaw"
},
{
"country": "Poland",
"value": "Polish Air Force Academy, Deblin, Poland",
"organization": "Polish Air Force Academy"
}
],
"surname": "Tomaszewska",
"given_names": "J.",
"full_name": "Tomaszewska, J."
},
{
"affiliations": [
{
"country": "Ukraine",
"value": "Department of Nuclear Physics, National Taras Shevchenko University of Kyiv, Kyiv, Ukraine",
"organization": "Department of Nuclear Physics, National Taras Shevchenko University of Kyiv"
},
{
"country": "Germany",
"value": "Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany",
"organization": "Deutsches Elektronen-Synchrotron DESY"
}
],
"surname": "Trofymov",
"given_names": "A.",
"full_name": "Trofymov, A."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany",
"organization": "Deutsches Elektronen-Synchrotron DESY"
},
{
"country": "Germany",
"value": "European X-ray Free-Electron Laser facility GmbH, Hamburg, Germany",
"organization": "European X-ray Free-Electron Laser facility GmbH"
}
],
"surname": "Turkot",
"given_names": "O.",
"full_name": "Turkot, O."
},
{
"affiliations": [
{
"country": "Poland",
"value": "National Centre for Nuclear Research, Warsaw, Poland",
"organization": "National Centre for Nuclear Research"
}
],
"surname": "Tymieniecka",
"given_names": "T.",
"full_name": "Tymieniecka, T."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Max-Planck-Institut f\u00fcr Physik, M\u00fcnchen, Germany",
"organization": "Max-Planck-Institut f\u00fcr Physik"
}
],
"surname": "Verbytskyi",
"given_names": "A.",
"full_name": "Verbytskyi, A."
},
{
"affiliations": [
{
"country": "Malaysia",
"value": "National Centre for Particle Physics, Universiti Malaya, Kuala Lumpur, 50603, Malaysia",
"organization": "Universiti Malaya"
}
],
"surname": "Wan Abdullah",
"given_names": "W.",
"full_name": "Wan Abdullah, W."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany",
"organization": "Deutsches Elektronen-Synchrotron DESY"
}
],
"surname": "Wichmann",
"given_names": "K.",
"full_name": "Wichmann, K."
},
{
"affiliations": [
{
"country": "UK",
"value": "Physics and Astronomy Department, University College London, London, United Kingdom",
"organization": "University College London"
}
],
"surname": "Wing",
"email": "m.wing@ucl.ac.uk",
"full_name": "Wing, M.",
"given_names": "M."
},
{
"affiliations": [
{
"country": "Japan",
"value": "Institute of Particle and Nuclear Studies, KEK, Tsukuba, Japan",
"organization": "Institute of Particle and Nuclear Studies, KEK"
}
],
"surname": "Yamada",
"given_names": "S.",
"full_name": "Yamada, S."
},
{
"affiliations": [
{
"country": "Japan",
"value": "Department of Physics, Kobe University, Kobe, Japan",
"organization": "Kobe University"
}
],
"surname": "Yamazaki",
"given_names": "Y.",
"full_name": "Yamazaki, Y."
},
{
"affiliations": [
{
"country": "Poland",
"value": "Faculty of Physics, University of Warsaw, Warsaw, Poland",
"organization": "University of Warsaw"
}
],
"surname": "\u017barnecki",
"given_names": "A.",
"full_name": "\u017barnecki, A."
},
{
"affiliations": [
{
"country": "Germany",
"value": "Deutsches Elektronen-Synchrotron DESY, Hamburg, Germany",
"organization": "Deutsches Elektronen-Synchrotron DESY"
},
{
"country": "CERN",
"value": "CERN, Geneva, Switzerland",
"organization": "CERN"
}
],
"surname": "Zenaiev",
"given_names": "O.",
"full_name": "Zenaiev, O."
}
],
"titles": [
{
"source": "Springer",
"title": "Measurement of the cross-section ratio \u03c3 \u03c8(2S) /\u03c3 J/\u03c8(1S) in exclusive photoproduction at HERA"
}
],
"dois": [
{
"value": "10.1007/JHEP12(2022)164"
}
],
"publication_info": [
{
"page_end": "27",
"journal_title": "Journal of High Energy Physics",
"material": "article",
"journal_volume": "2022",
"artid": "JHEP12(2022)164",
"year": 2022,
"page_start": "1",
"journal_issue": "12"
}
],
"$schema": "http://repo.scoap3.org/schemas/hep.json",
"acquisition_source": {
"date": "2023-03-26T00:31:17.262657",
"source": "Springer",
"method": "Springer",
"submission_number": "57ba2b5ecb6d11eda920065bd8dc6b20"
},
"page_nr": [
27
],
"license": [
{
"url": "https://creativecommons.org/licenses//by/4.0",
"license": "CC-BY-4.0"
}
],
"copyright": [
{
"holder": "The Author(s)",
"year": "2022"
}
],
"control_number": "74853",
"collaborations": [
{
"value": "The ZEUS collaboration"
}
],
"_files": [
{
"checksum": "md5:685cc21b13bbbd9a6358102a5d1670f8",
"filetype": "xml",
"bucket": "109c1abe-a675-4f05-89ab-d856df3f7c39",
"version_id": "3ef04a1d-dad4-46d2-915d-0da17ec77074",
"key": "10.1007/JHEP12(2022)164.xml",
"size": 65462
},
{
"checksum": "md5:92d96502a1343d66000ad41898a12804",
"filetype": "pdf/a",
"bucket": "109c1abe-a675-4f05-89ab-d856df3f7c39",
"version_id": "88d97615-9e0e-40e3-93e7-69296008a2bb",
"key": "10.1007/JHEP12(2022)164_a.pdf",
"size": 974628
}
],
"record_creation_date": "2022-12-31T03:30:23.190269",
"collections": [
{
"primary": "Journal of High Energy Physics"
}
],
"arxiv_eprints": [
{
"categories": [
"hep-ex",
"hep-ph"
],
"value": "2206.13343"
}
],
"abstracts": [
{
"source": "Springer",
"value": "The exclusive photoproduction reactions \u03b3p \u2192 J/\u03c8(1S)p and \u03b3p \u2192 \u03c8(2S)p have been measured at an ep centre-of-mass energy of 318 GeV with the ZEUS detector at HERA using an integrated luminosity of 373 pb \u22121. The measurement was made in the kinematic range 30 < W < 180 GeV, Q 2 < 1 GeV2 and |t| < 1 GeV2, where W is the photon-proton centre-of-mass energy, Q 2 is the photon virtuality and t is the squared four-momentum transfer at the proton vertex. The decay channels used were J/\u03c8(1S) \u2192 \u03bc + \u03bc \u2212 , \u03c8(2S) \u2192 \u03bc + \u03bc \u2212 and \u03c8(2S) \u2192 J/\u03c8(1S)\u03c0 + \u03c0 \u2212 with subsequent decay J/\u03c8(1S) \u2192 \u03bc + \u03bc \u2212 . The ratio of the production cross sections, R = \u03c3 \u03c8(2S) /\u03c3 J/\u03c8(1S), has been measured as a function of W and |t| and compared to previous data in photoproduction and deep inelastic scattering and with predictions of QCD-inspired models of exclusive vector-meson production, which are in reasonable agreement with the data."
}
],
"imprints": [
{
"date": "2022-12-29",
"publisher": "Springer"
}
]
}