Measurement of the cross-section ratio [sigma][psi](2S)/[sigma]J/[psi](1S) in deep inelastic exclusive ep scattering at HERA

• Verfasst von: Abramowicz, Halina [VerfasserIn]
• Verfasst von: Lisovyi, Mykhailo [VerfasserIn]
• Titel: Measurement of the cross-section ratio [sigma][psi](2S)/[sigma]J/[psi](1S) in deep inelastic exclusive ep scattering at HERA
• Körperschaft: ZEUS Collaboration [VerfasserIn]
• Verf.angabe: ZEUS Collaboration*
• E-Jahr: 2016
• Jahr: 10 June 2016
• Fussnoten: *ZEUS Collaboration: H. Abramowicz, M. Lisovyi [und 144 weitere Personen] ; Im Titel sind "sigma" und "psi" als griechische Buchstaben dargestellt ; Im Titel sind die Formulierungen "psi(2S)" und "J/psi(1S)" tiefgestellt ; Gesehen am 20.07.2020
• Titel Quelle: Enthalten in: Nuclear physics <Amsterdam> / B
• Ort Quelle: Amsterdam : North-Holland Publ. Co., 1967
• Jahr Quelle: 2016
• Band/Heft Quelle: 909(2016), Seite 934-953$t
• ISSN Quelle: 1873-1562
• DOI: doi:10.1016/j.nuclphysb.2016.06.010
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1725149702

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.