Probing the gluon tomography in photoproduction of dipion

被引：19

作者：

Hagiwara, Yoshikazu ^{[1
]}

Zhang, Cheng ^{[1
]}

Zhou, Jian ^{[1
]}

Zhou, Ya-jin ^{[1
]}

机构：

[1] Shandong Univ, Inst Frontier & Interdisciplinary Sci, Key Lab Particle Phys & Particle Irradiat MOE, Qingdao 266237, Shandong, Peoples R China

来源：

PHYSICAL REVIEW D | 2021年 / 104卷 / 09期

基金：

中国国家自然科学基金; 中国博士后科学基金;

关键词：

ELECTROPRODUCTION; COLLISIONS; INTERFERENCE; ODDERON;

D O I：

10.1103/PhysRevD.104.094021

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

A sizable cos 4 phi azimuthal asymmetry in exclusive dipion production near p degrees resonance peak in ultraperipheral heavy-ion collisions recently has been reported by STAR collaboration. We show that both elliptic gluon Wigner distribution and final-state soft photon radiation can give rise to this azimuthal asymmetry. The fact that the QED effect alone severely underestimates the observed asymmetry might signal the existence of the nontrivial correlation in quantum phase distribution of gluons.

引用

页数：8

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