Infrared properties of quark gas

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Abstract

Infrared properties of quark gas at finite density are studied using renormalization-group-improved perturbation theory. The running coupling constant shows color charge screening in the infrared region and asymptotic freedom in the ultraviolet region. Color density correlations are finite. Instanton contributions to the partition function are estimated and found to be large at low density. Possible ambiguities of the perturbation expansion in the many-body medium are discussed.

Original languageEnglish (US)
Pages (from-to)989-995
Number of pages7
JournalPhysical Review D
Volume20
Issue number4
DOIs
StatePublished - 1979
Externally publishedYes

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