Photons production in heavy-ion collisions as a signal of deconfinement phase
arXiv:2208.00842 · doi:10.1140/epja/s10050-023-00986-w
Abstract
The photon production due to conversion of two gluons into a photon, , 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.
arXiv comment26 pages, 7 figures. Version accepted for publication in Eur. Phys. J. A
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