| Article | |
| Report number | arXiv:2206.13343 ; DESY-22-107 |
| Title | Measurement of the cross-section ratio σ$_{ψ(2S)}$/σ$_{J/ψ(1S)}$ in exclusive photoproduction at HERA |
| Related title | Measurement of the cross-section ratio $\sigma_{\psi(2S )}/\sigma_{J/\psi(1S )}$ in exclusive photoproduction at HERA |
| Author(s) |
Abt, I. (Munich, Max Planck Inst.) ; Adamus, M. (Warsaw, Inst. Nucl. Studies) ; Aggarwal, R. (Unlisted, IN) ; Aushev, V. (Taras Shevchenko U.) ; Behnke, O. (DESY) ; Bertolin, A. (INFN, Padua) ; Bloch, I. (DESY, Zeuthen) ; Brock, I. (Bonn U.) ; Brook, N.H. (University Coll. London ; Bath U.) ; Brugnera, R. (Padua U., Astron. Dept. ; INFN, Padua) ; Bruni, A. (INFN, Bologna) ; Bussey, P.J. (Glasgow U.) ; Caldwell, A. (Munich, Max Planck Inst.) ; Catterall, C.D. (York U., Canada) ; Chwastowski, J. (Cracow, INP) ; Ciborowski, J. (Warsaw U. ; Lodz U.) ; Ciesielski, R. (DESY ; Rockefeller U.) ; Cooper-Sarkar, A.M. (Oxford U.) ; Corradi, M. (INFN, Bologna ; INFN, Rome) ; Dementiev, R.K. (INFN, Padua) ; Dusini, S. (INFN, Padua) ; Ferrando, J. (DESY) ; Foster, B. (Oxford U. ; Trieste U. ; Frascati ; Hamburg U. ; DESY) ; Gallo, E. (Hamburg U. ; DESY) ; Gangadharan, D. (Heidelberg U. ; Houston U.) ; Garfagnini, A. (Padua U., Astron. Dept. ; INFN, Padua) ; Geiser, A. (DESY) ; Grzelak, G. (Warsaw U.) ; Gwenlan, C. (Oxford U.) ; Hochman, D. (Weizmann Inst.) ; Jomhari, N.Z. (DESY) ; Kadenko, I. (Taras Shevchenko U.) ; Karshon, U. (Weizmann Inst.) ; Kaur, P. (SLIET, Longowal) ; Klanner, R. (Hamburg U.) ; Klein, U. (DESY ; U. Liverpool (main)) ; Korzhavina, I.A. (Hamburg U.) ; Kovalchuk, N. (Hamburg U.) ; Kuze, M. (Tokyo Inst. Tech.) ; Levchenko, B.B. (Tel Aviv U.) ; Levy, A. (Tel Aviv U.) ; Löhr, B. (DESY) ; Lohrmann, E. (Hamburg U.) ; Longhin, A. (Padua U., Astron. Dept. ; INFN, Padua) ; Lorkowski, F. (DESY) ; Makarenko, I. (DESY) ; Malka, J. (DESY ; Hamburg U.) ; Masciocchi, S. (Heidelberg U. ; Darmstadt, GSI) ; Nagano, K. (KEK, Tsukuba) ; Nam, J.D. (Temple U.) ; Onishchuk, Yu. (Taras Shevchenko U.) ; Paul, E. (Bonn U.) ; Pidhurskyi, I. (Frankfurt U., Inst. Kernphys.) ; Polini, A. (INFN, Bologna) ; Przybycień, M. (AGH-UST, Cracow) ; Quintero, A. (Temple U.) ; Rubinsky, I. (DESY) ; Ruspa, M. (Piemonte Orientale U., Alessandria) ; Schneekloth, U. (DESY) ; Schörner-Sadenius, T. (DESY) ; Selyuzhenkov, I. (Darmstadt, GSI) ; Shchedrolosiev, M. (DESY) ; Shcheglova, L.M. (Glasgow U.) ; Skillicorn, I.O. (Glasgow U.) ; Słomiński, W. (Jagiellonian U.) ; Solano, A. (INFN, Turin ; Turin U.) ; Stanco, L. (INFN, Padua) ; Stefaniuk, N. (DESY) ; Surrow, B. (Temple U.) ; Tokushuku, K. (KEK, Tsukuba) ; Tomaszewska, J. (Warsaw U. ; Air Force Weapons Lab) ; Trofymov, A. (Taras Shevchenko U. ; DESY) ; Turkot, O. (DESY ; Hamburg U.) ; Tymieniecka, T. (Warsaw, Inst. Nucl. Studies) ; Verbytskyi, A. (Munich, Max Planck Inst.) ; Wan Abdullah, W.A. T. (Malaya U.) ; Wichmann, K. (DESY) ; Wing, M. (University Coll. London) ; Yamada, S. (KEK, Tsukuba) ; Yamazaki, Y. (Kobe U.) ; Żarnecki, A.F. (Warsaw U.) ; Zenaiev, O. (DESY ; CERN) |
| Publication | 2022-12-29 |
| Imprint | 2022-06-27 |
| Number of pages | 27 |
| Note | 31 pages, 9 figures. Updated according to comments from journal referee including a new table. Added full collaboration author list |
| In: | JHEP 2212 (2022) 164 |
| DOI | 10.1007/JHEP12(2022)164 |
| Subject category | Particle Physics - Experiment ; Particle Physics - Phenomenology |
| Accelerator/Facility, Experiment | DESY HERA ; ZEUS |
| Abstract | The exclusive photoproduction reactions $\gamma p \to J/\psi(1S) p$ and $\gamma p \to \psi(2S) p$ 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, $Q^2 < 1$ GeV$^2$ and $|t| < 1$ GeV$^2$, 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 $J/\psi(1S) \to \mu^+ \mu^-$, $\psi(2S) \to \mu^+ \mu^-$ and $\psi(2S) \to J/\psi(1S) \pi^+ \pi^-$ with subsequent decay $J/\psi(1S) \to \mu^+ \mu^-$. The ratio of the production cross sections, $R = \sigma_{\psi(2S)} / \sigma_{J/\psi(1S)}$, 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. |
| Copyright/License | publication: © 2022-2024 The Authors (License: CC-BY-4.0), sponsored by SCOAP³ preprint: (License: CC BY 4.0) |
Corresponding record in: Inspire
Element opprettet 2023-01-11, sist endret 2023-08-10
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