DAMPING RATE OF A MOVING FERMION

被引：54

作者：

ALTHERR, T

PETITGIRARD, E

GAZTELURRUTIA, TD

机构：

[1] Laboratoire de Physique Théorique ENSLAPP, F-74941 Annecy-le-Vieux Cedex

来源：

PHYSICAL REVIEW D | 1993年 / 47卷 / 02期

关键词：

D O I：

10.1103/PhysRevD.47.703

中图分类号：

P1 [天文学];

学科分类号：

0704 ;

摘要：

We perform a detailed analysis of the damping rate of a moving fermion in hot QED. Using bare propagators and taking a slightly off-shell fermion, we prove the cancellation of both magnetic and electric infrared singularities at two-loop order. Although infrared finite, the perturbation series is very badly behaved when the fermion is taken on shell. This problem is overcome by resumming both the hard loops in the photon propagator and the damping rate in the fermion propagator. The damping rate can only be calculated through a Schwinger-Dyson equation. We also study the gauge independence of our result.

引用

页码：703 / 710

页数：8

共 43 条

[1] INFRARED PROBLEM IN G-PHI-4 THEORY AT FINITE TEMPERATURE [J].

ALTHERR, T .

PHYSICS LETTERS B, 1990, 238 (2-4) :360-366

[2] LOW-MASS DILEPTONS AT HIGH MOMENTA IN ULTRA-RELATIVISTIC HEAVY-ION COLLISIONS [J].

ALTHERR, T ;

RUUSKANEN, PV .

NUCLEAR PHYSICS B, 1992, 380 (03) :377-390

[3] CANCELLATION OF INFRARED AND MASS SINGULARITIES IN THE THERMAL DILEPTON RATE [J].

ALTHERR, T ;

BECHERRAWY, T .

NUCLEAR PHYSICS B, 1990, 330 (01) :174-192

[4] ON INFRARED AND MASS SINGULARITIES OF PERTURBATIVE QCD IN A QUARK GLUON PLASMA [J].

ALTHERR, T ;

AURENCHE, P ;

BECHERRAWY, T .

NUCLEAR PHYSICS B, 1989, 315 (02) :436-464

[5] INFRARED SINGULARITIES CANCELLATION IN REACTION-RATES AT FINITE TEMPERATURE [J].

ALTHERR, T .

PHYSICS LETTERS B, 1991, 262 (2-3) :314-319

[6]

ALTHERR T, 1989, PHYS REV D, V40, P4141

[7] DIAGRAMMATIC ALGORITHM FOR EVALUATING FINITE-TEMPERATURE REACTION-RATES [J].

ASHIDA, N ;

NAKKAGAWA, H ;

NIEGAWA, A .

ANNALS OF PHYSICS, 1992, 215 (02) :315-371

[8] HIGH-TEMPERATURE FERMION PROPAGATOR - RESUMMATION AND GAUGE DEPENDENCE OF THE DAMPING RATE [J].

BAIER, R ;

KUNSTATTER, G ;

SCHIFF, D .

PHYSICAL REVIEW D, 1992, 45 (12) :R4381-R4384

[9] PRODUCTION-RATE OF HARD THERMAL PHOTONS AND SCREENING OF QUARK MASS SINGULARITY [J].

BAIER, R ;

NAKKAGAWA, H ;

NIEGAWA, A ;

REDLICH, K .

ZEITSCHRIFT FUR PHYSIK C-PARTICLES AND FIELDS, 1992, 53 (03) :433-438

[10] DILEPTON PRODUCTION AT FINITE TEMPERATURE - PERTURBATIVE TREATMENT AT ORDER ALPHA-S [J].

BAIER, R ;

PIRE, B ;

SCHIFF, D .

PHYSICAL REVIEW D, 1988, 38 (09) :2814-2832

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