Electroproduction of heavy quarkonia: significance of dipole orientation - INSPIRE

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Electroproduction of heavy quarkonia: significance of dipole orientation

B.Z. Kopeliovich
(
- Santa Maria U., Valparaiso
)
,
M. Krelina
(
- Prague, Tech. U.
)
,
J. Nemchik
(
- Prague, Tech. U.
)

Feb 11, 2021

13 pages

Published in:

Phys.Rev.D 103 (2021) 9, 094027

Published: May 22, 2021

e-Print:

2102.06106 [hep-ph]

DOI:

10.1103/PhysRevD.103.094027

View in:

ADS Abstract Service

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Abstract: (APS)

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.

Note:

12 pages, 6 figures

Strong Interactions
quarkonium: heavy
cross section: dipole
quarkonium: wave function
quarkonium: electroproduction
correlation
diffraction
differential cross section
Schroedinger equation
transverse momentum

References(77)

Figures(0)

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