2016
DOI: 10.1016/j.nuclphysb.2016.06.010
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Measurement of the cross-section ratio σ ψ(2S) / σ J/ψ(1S) in deep inelastic exclusive ep scattering at HERA

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 < Q 2 < 80 GeV 2 , 937 30 < W < 210 GeV and |t| < 1 GeV 2 , where Q 2 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 < Q 2 < 5 GeV 2 were taken in the HERA I running period and correspond to an integrated luminosity of 114 pb −… Show more

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Cited by 14 publications
(25 citation statements)
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“…[21] for coherent charmonium production in electron-lead collisions. The experiment data points are measurements by ZEUS collaboration [28] in electron-proton scattering at HERA.…”
Section: Discussionmentioning
confidence: 99%
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“…[21] for coherent charmonium production in electron-lead collisions. The experiment data points are measurements by ZEUS collaboration [28] in electron-proton scattering at HERA.…”
Section: Discussionmentioning
confidence: 99%
“…[21] for details. � � (��� � ) Figure 2: Predictions of the BLFQ LFWF (solid curves) and the boosted Gaussian LFWF (dashed curves) compared with the HERA experimental data for the σ Ψ(2s) /σ J/Ψ cross-section ratio as a function of Q 2 in electron-proton scattering [28]. Error bars indicate the statistical uncertainties.…”
Section: Theoretical Frameworkmentioning
confidence: 99%
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“…D * production in diffractive DIS [5] and prompt photon production in diffractive photoproduction [6] are compared to the models based on the diffractive PDFs. The production ratio ψ(2S )/ψ(1S ) in diffractive DIS [7] is compared to various models with approaches based on perturbative QCD in Section 4. Exclusive production of ρ 0 in photoproduction with a fast neutron [8] is reviewed in Section 5 in the context of the absorptive phenomena.…”
Section: Introductionmentioning
confidence: 99%
“…The predictions of the models FFJS, KNNPZZ and LM also provide fair descriptions of the measurements. The material described above has recently been published [29].…”
mentioning
confidence: 99%