Coherent photoproduction of heavy quarkonia on nuclei

被引：6

作者：

Kopeliovich, B. Z. ^{[1
]}

Krelina, M. ^{[2
,3
]}

Nemchik, J. ^{[2
,4
]}

Potashnikova, I. K. ^{[1
]}

机构：

[1] Univ Tecn Federico Santa Maria, Dept Fis, Ave Espana 1680, Valparaiso, Chile

[2] Czech Tech Univ, FNSPE, Brehova 7, Prague 11519, Czech Republic

[3] Heidelberg Univ, Phys Inst, Neuenheimer Feld 226, D-69120 Heidelberg, Germany

[4] Inst Expt Phys SAS, Watsonova 47, Kosice 04001, Slovakia

来源：

PHYSICAL REVIEW D | 2022年 / 105卷 / 05期

关键词：

VECTOR-MESONS; DIFFRACTIVE ELECTROPRODUCTION; QUANTUM ELECTRODYNAMICS; INFINITE-MOMENTUM; J/PSI MESONS; CHARMONIUM; SCATTERING; EXPANSION; PHOTON; MODEL;

D O I：

10.1103/PhysRevD.105.054023

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

The differential cross section of coherent photoproduction of heavy quarkonia on nuclear targets is calculated within the QCD color dipole formalism. The higher-twist nuclear shadowing corresponding to the (Q) over barQ Fock component of the photon is calculated including the correlation between dipole orientation (r) over right arrow and impact parameter of a collision (b) over right arrow, which is related to the transverse momentum transfer via the Fourier transform. We also included the leading-twist gluon shadowing corresponding to higher Fock components of the photon containing gluons, which have specifically short coherence time, especially for multigluon components, even at very high energies. The contribution of such fluctuating gluonic dipole is calculated employing the path-integral technique. Our results are in good agreement with recent ALICE data on charmonium production in ultraperipheral nuclear collisions.

引用

页数：10

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