An infrared singularity in the damping rate for longitudinal gluons in hot QCD

A. Abada; O. Azi

doi:10.1016/S0370-2693(99)00959-4

An infrared singularity in the damping rate for longitudinal gluons in hot QCD

A. Abada, O. Azi

Research output: Contribution to journal › Article › peer-review

10 Citations (Scopus)

Abstract

We calculate γ_l(0), the damping rate for longitudinal on-shell gluons with zero momentum in hot QCD using the hard-thermal-loop scheme, and find it to be divergent in the infrared. We argue that this result suggests that the scheme may be sensitive in this sector and thus may need to be improved upon. We discuss the validity of our result and emphasize the fact that it depends on the way we perform our calculation. In particular, we do not exclude the possibility that alternative approaches that we briefly comment on may in principle yield infrared-safe results.

Original language	English
Pages (from-to)	117-125
Number of pages	9
Journal	Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume	463
Issue number	1
DOIs	https://doi.org/10.1016/S0370-2693(99)00959-4
Publication status	Published - 1999
Externally published	Yes

Keywords

Hard thermal loops
Soft gluon damping

ASJC Scopus subject areas

Nuclear and High Energy Physics

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10.1016/S0370-2693(99)00959-4

Cite this

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title = "An infrared singularity in the damping rate for longitudinal gluons in hot QCD",

abstract = "We calculate γl(0), the damping rate for longitudinal on-shell gluons with zero momentum in hot QCD using the hard-thermal-loop scheme, and find it to be divergent in the infrared. We argue that this result suggests that the scheme may be sensitive in this sector and thus may need to be improved upon. We discuss the validity of our result and emphasize the fact that it depends on the way we perform our calculation. In particular, we do not exclude the possibility that alternative approaches that we briefly comment on may in principle yield infrared-safe results.",

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T1 - An infrared singularity in the damping rate for longitudinal gluons in hot QCD

AU - Abada, A.

AU - Azi, O.

PY - 1999

Y1 - 1999

N2 - We calculate γl(0), the damping rate for longitudinal on-shell gluons with zero momentum in hot QCD using the hard-thermal-loop scheme, and find it to be divergent in the infrared. We argue that this result suggests that the scheme may be sensitive in this sector and thus may need to be improved upon. We discuss the validity of our result and emphasize the fact that it depends on the way we perform our calculation. In particular, we do not exclude the possibility that alternative approaches that we briefly comment on may in principle yield infrared-safe results.

AB - We calculate γl(0), the damping rate for longitudinal on-shell gluons with zero momentum in hot QCD using the hard-thermal-loop scheme, and find it to be divergent in the infrared. We argue that this result suggests that the scheme may be sensitive in this sector and thus may need to be improved upon. We discuss the validity of our result and emphasize the fact that it depends on the way we perform our calculation. In particular, we do not exclude the possibility that alternative approaches that we briefly comment on may in principle yield infrared-safe results.

KW - Hard thermal loops

KW - Soft gluon damping

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UR - http://www.scopus.com/inward/citedby.url?scp=0007375111&partnerID=8YFLogxK

U2 - 10.1016/S0370-2693(99)00959-4

DO - 10.1016/S0370-2693(99)00959-4

M3 - Article

AN - SCOPUS:0007375111

SN - 0370-2693

VL - 463

SP - 117

EP - 125

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

IS - 1

ER -

An infrared singularity in the damping rate for longitudinal gluons in hot QCD

Abstract

Keywords

ASJC Scopus subject areas

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