Photons production in heavy-ion collisions as a signal of deconfinement phase

被引：4

作者：

Nedelko, Sergei ^{[1
]}

Nikolskii, Aleksei ^{[1
]}

机构：

[1] JINR, Bogoliubov Lab Theoret Phys, Dubna 141980, Russia

来源：

EUROPEAN PHYSICAL JOURNAL A | 2023年 / 59卷 / 04期

关键词：

QUARK-GLUON PLASMA; MAGNETIC-FIELD; RADIATION; QCD; CONFINEMENT; LATTICE;

D O I：

10.1140/epja/s10050-023-00986-w

中图分类号：

O57 [原子核物理学、高能物理学];

学科分类号：

070202 ;

摘要：

The photon production due to conversion of two gluons into a photon, gg ? ?, in the presence of the background gauge fields is studied within the specific mean-field approach to QCD vacuum. In this approach, mean field in the confinement phase is represented by the statistical ensemble of almost everywhere homogeneous abelian (anti-)self-dual gluon configurations, while the deconfined phase can be characterized by the purely chromomagnetic fields. The probability of gluon conversion of two gluons into a photon vanishes in the confinement phase due to the randomness of the background field configurations. The anisotropic strong electromagnetic field, generated in the collision of relativistic heavy ions, serves as a catalyst for deconfinement with the appearance of an anisotropic purely chromomagnetic mean field. Respectively, deconfined phase is characterized by nonzero probability of the conversion of two gluons into a photon with strongly anisotropic angular distribution.

引用

页数：13

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