Measurement of the cross-section ratio σψ(2S)/σJ/ψ(1S) in deep inelastic exclusive ep scattering at HERA

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Abramowicz, H, Abt, I, Adamczyk, L, Adamus, M, Antonelli, S, Aushev, V, Aushev, Y, Behnke, O, Behrens, U, Bertolin, A et al (show 90 more authors) , Bloch, I, Boos, EG, Borras, K, 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, Corriveau, F, Dementiev, RK, Devenish, RCE, Dolinska, G, Dusini, S, Figiel, J, Foster, B, Gach, G, Gallo, E, Garfagnini, A, Geiser, A, Gizhko, A, Gladilin, LK, Golubkov, YA, Grebenyuk, J, Gregor, I, Grzelak, G, Gueta, O, Guzik, M, Hain, W, Hochman, D, Hori, R, Ibrahim, ZA, Iga, Y, Ishitsuka, M, Iudin, A, Januschek, F, Jomhari, NZ, Kadenko, I, Kananov, S, Karshon, U, Kaur, M, Kaur, P, Kisielewska, D, Klanner, R, Klein, U ORCID: 0000-0001-7391-5330, Kondrashova, N, Kononenko, O, Korol, I, Korzhavina, IA, Kotański, A, Kötz, U, Kovalchuk, N, Kowalski, H, Krupa, B, Kuprash, O, Kuze, M, Levchenko, BB, Levy, A, Libov, V, Limentani, S, Lisovyi, M, Lobodzinska, E, Löhr, B, Lohrmann, E, Longhin, A, Lontkovskyi, D, Lukina, OY, Makarenko, I, Malka, J, Mergelmeyer, S, Mohamad Idris, F, Mohammad Nasir, N, Myronenko, V, Nagano, K, Nobe, T, Notz, D, Nowak, RJ, Onishchuk, Y, Paul, E, Perlański, W, Pokrovskiy, NS, Przybycień, M and Roloff, P (2016) Measurement of the cross-section ratio σψ(2S)/σJ/ψ(1S) in deep inelastic exclusive ep scattering at HERA Nuclear Physics B, 909. pp. 934-953. ISSN 0550-3213, 1873-1562

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Abstract

The exclusive deep inelastic electroproduction of ψ(2S) and J/ψ(1S) at an ep centre-of-mass energy of 317 GeV has been studied with the ZEUS detector at HERA in the kinematic range 2<Q²<80 GeV², 30<W<210 GeV and |t|<1 GeV², where Q² is the photon virtuality, W is the photon–proton centre-of-mass energy and t is the squared four-momentum transfer at the proton vertex. The data for 2<Q²<5 GeV² were taken in the HERA I running period and correspond to an integrated luminosity of 114 pb⁻¹. The data for 5<Q²<80 GeV² are from both HERA I and HERA II periods and correspond to an integrated luminosity of 468 pb⁻¹. The decay modes analysed were μ⁺μ⁻ and J/ψ(1S)π⁺π⁻ for the ψ(2S) and μ⁺μ⁻ for the J/ψ(1S). The cross-section ratio σ<inf>ψ(2S)</inf>/σ<inf>J/ψ(1S)</inf> has been measured as a function of Q²,W  and t. The results are compared to predictions of QCD-inspired models of exclusive vector-meson production.

Item Type:	Article
Uncontrolled Keywords:	5106 Nuclear and Plasma Physics, 5107 Particle and High Energy Physics, 4902 Mathematical Physics, 49 Mathematical Sciences, 51 Physical Sciences
Depositing User:	Symplectic Admin
Date Deposited:	27 Jan 2017 15:40
Last Modified:	01 Mar 2026 01:24
DOI:	10.1016/j.nuclphysb.2016.06.010
Open Access URL:	https://arxiv.org/abs/1606.08652
Related Websites:	Author Publisher
URI:	https://livrepository.liverpool.ac.uk/id/eprint/3005425
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