Rate of photon production in the quark-gluon plasma from lattice QCD

被引：6

作者：

Ce, Marco ^{[1
,2
]}

Harris, Tim ^{[3
,4
]}

Meyer, Harvey B. ^{[1
,5
,6
]}

Steinberg, Aman ^{[5
,6
,7
]}

Toniato, Arianna ^{[5
,6
]}

机构：

[1] Johannes Gutenberg Univ Mainz, Helmholtz Inst Mainz, D-55099 Mainz, Germany

[2] CERN, Theoret Phys Dept, CH-1211 Geneva 23, Switzerland

[3] Univ MilanoBicocca, Dipartimento Fis, Piazza Sci 3, I-20126 Milan, Italy

[4] Ist Nazl Fis Nucl, Sez MilanoBicocca, Piazza Sci 3, I-20126 Milan, Italy

[5] Johannes Gutenberg Univ Mainz, PRISMA Cluster Excellence, D-55099 Mainz, Germany

[6] Johannes Gutenberg Univ Mainz, Inst Kernphys, D-55099 Mainz, Germany

[7] Univ Bielefeld, Fak Phys, D-33615 Bielefeld, Germany

来源：

PHYSICAL REVIEW D | 2020年 / 102卷 / 09期

基金：

欧盟地平线“2020”; 欧洲研究理事会;

关键词：

PB-PB COLLISIONS; MASS;

D O I：

10.1103/PhysRevD.102.091501

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We calculate the thermal rate of real-photon production in the quark-gluon plasma at a temperature of T = 254 MeV using lattice QCD. The calculation is based on the difference between the spatially transverse and longitudinal parts of the polarization tensor, which has the advantage of falling off rapidly at large frequencies. We obtain this linear combination in the time-momentum representation from lattice QCD with two flavors of quarks in the continuum limit with a precision of about two parts per mille. Applying a theoretically motivated fit ansatz for the associated spectral function, we obtain values for the photon rate that are in line with QCD weak-coupling calculations. A representative result is d Gamma(k)/dk = (1.5(-1.5)(+2.1)).(10 fm)(-4).(0.2 GeV)(-1) at k = 1.2 GeV for the differential rate of photon production per unit volume of plasma.

引用

页数：6

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