Electroproduction of heavy quarkonia

• Verfasst von: Kopeliovich, Boris Z. [VerfasserIn]
• Verfasst von: Krelina, Michal [VerfasserIn]
• Verfasst von: Nemčik, Jan [VerfasserIn]
• Titel: Electroproduction of heavy quarkonia
• Titelzusatz: significance of dipole orientation
• Verf.angabe: B.Z. Kopeliovich, M. Krelina, and J. Nemchik
• E-Jahr: 2021
• Jahr: 21 May 2021
• Umfang: 13 S.
• Fussnoten: Gesehen am 28.02.2022
• Titel Quelle: Enthalten in: Physical review
• Ort Quelle: Woodbury, NY : Inst., 2016
• Jahr Quelle: 2021
• Band/Heft Quelle: 103(2021), 9 vom: 1. Mai, Artikel-ID 094027, Seite 1-13
• ISSN Quelle: 2470-0029
• DOI: doi:10.1103/PhysRevD.103.094027
• Datenträger: Online-Ressource
• Sprache: eng
• K10plus-PPN: 1794000720

Abstract

The differential cross section dσ/dq2 of diffractive electroproduction of heavy quarkonia on protons is a sensitive study tool for the interaction dynamics within the dipole representation. Knowledge of the transverse momentum transfer →q provides a unique opportunity to identify the reaction plane, due to a strong correlation between the directions of →q and impact parameter →b. On top of that, the elastic dipole-proton amplitude is subject to a strong correlation between →b and dipole orientation →r. Most of models for b-dependent dipole cross sections either completely miss this information, or make unjustified assumptions. We perform calculations basing on a realistic model for →r−→b correlation, which significantly affect the q dependence of the cross section, in particular the ratio of ψ′(2S) to J/ψ(1S) yields. We rely on realistic potential models for the heavy quarkonium wave function and the Lorentz-boosted Schrödinger equation.