Abramowicz, H, Abt, I, Adamczykh, L, Adamus, M, Antonelli, S, Aushev, V, Aushev, Y, Behnke, O, Behrens, U, Bertolin, A et al (show 136 more authors)
(2016)
Measurement of the cross-section ratio σ<sub>ψ(2<i>S</i>)</sub>/σ<sub><i>J</i>/ψ(1<i>S</i>)</sub> in deep inelastic exclusive <i>ep</i> scattering at HERA.
NUCLEAR PHYSICS B, 909.
pp. 934-953.
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 σψ(2S)/σJ/ψ(1S) 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 |
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Depositing User: | Symplectic Admin |
Date Deposited: | 27 Jan 2017 15:40 |
Last Modified: | 19 Nov 2023 16:47 |
DOI: | 10.1016/j.nuclphysb.2016.06.010 |
Open Access URL: | https://arxiv.org/abs/1606.08652 |
Related URLs: | |
URI: | https://livrepository.liverpool.ac.uk/id/eprint/3005425 |