ON THE PHOTON PRODUCTION IN NUCLEUS-NUCLEUS COLLISIONS AT HIGH-ENERGY

被引：3

作者：

TARASOV, YA

ANTONENKO, VG

机构：

[1] Institute for General and Nuclear Physics, Russian Research Centre, 'Kurchatov Institute', Moscow

来源：

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS | 1995年 / 66卷 / 1-2期

关键词：

D O I：

10.1007/BF01496595

中图分类号：

O412 [相对论、场论]; O572.2 [粒子物理学];

学科分类号：

摘要：

A modified Landau hydrodynamical model is applied to study hard thermal photon production in central heavy-ion collisions at LHC, RHIC and SPS energies. It is shown that the phase transition from quark-gluon plasma into hadrons in consequence of the thermodynamical expansion is close to the second order phase transition if a resonance production is taken into account. Hard direct photon emission is also investigated with consideration of nuclear shadowing effect on structure function of quarks and gluons. Also pi0-decay photon background is investigated. It is demonstrated that at the LHC energy photon yield from the quark-gluon plasma in the photon transversal momentum k(perpendicular) range from 5 to 25 GeV/c exceeds both the background and the direct photon yield. This conclusion may be important for the quark-gluon plasma diagnostic aims. It is also shown that for the LHC energy the thermal photon yield in the present model essentially exceeds this yield obtained in the Bjorken scaling model.

引用

页码：215 / 224

页数：10

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