Electroproduction of heavy quarkonia: significance of dipole orientation
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,...
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| Main Authors: | , , |
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| Format: | Article (Journal) |
| Language: | English |
| Published: |
21 May 2021
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| In: |
Physical review
Year: 2021, Volume: 103, Issue: 9, Pages: 1-13 |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.103.094027 |
| Online Access: | Verlag, lizenzpflichtig, Volltext: https://doi.org/10.1103/PhysRevD.103.094027 Verlag, lizenzpflichtig, Volltext: https://link.aps.org/doi/10.1103/PhysRevD.103.094027 
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| Author Notes: | B.Z. Kopeliovich, M. Krelina, and J. Nemchik |
| Summary: | 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. |
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| Item Description: | Gesehen am 28.02.2022 |
| Physical Description: | Online Resource |
| ISSN: | 2470-0029 |
| DOI: | 10.1103/PhysRevD.103.094027 |