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Operator product expansion and its thermal average

Abstract

QCD sum rules at finite temperature, like the ones at zero temperature, require the coefficients of local operators, which arise in the short distance expansion of the thermal average of two-point functions of currents. We extend the configuration space method, applied earlier at zero temperature, to the case at finite temperature. We find that, upto dimension four, two new operators arise, in addition to the two appearing already in the vacuum correlation functions. It is argued that the new operators would contribute substantially to the sum rules, when the temperature is not too low. (orig.) 7 refs.
Authors:
Mallik, S [1] 
  1. Saha Inst. of Nuclear Physics, Calcutta (India)
Publication Date:
May 01, 1998
Product Type:
Journal Article
Report Number:
CONF-9707114-
Reference Number:
SCA: 662230; PA: AIX-29:041025; EDB-99:094505; SN: 98001990200
Resource Relation:
Journal Name: Nuclear Physics B, Proceedings Supplements; Journal Volume: 64; Conference: International workshop in high energy physics: Euroconference on quantum photodynamics: QCD`97, Montpellier (France), 3-8 Jul 1997; Other Information: DN: 7 refs.; PBD: May 1998
Subject:
66 PHYSICS; ALGEBRAIC CURRENTS; CORRELATION FUNCTIONS; EXPECTATION VALUE; FIELD OPERATORS; INTERACTION RANGE; LOCALITY; OPERATOR PRODUCT EXPANSION; PROPAGATOR; QUANTUM CHROMODYNAMICS; QUARKS; SUM RULES; TEMPERATURE DEPENDENCE; VACUUM STATES
OSTI ID:
686181
Country of Origin:
Netherlands
Language:
English
Other Identifying Numbers:
Journal ID: NPBSE7; ISSN 0920-5632; TRN: NL98FA509041025
Submitting Site:
NLN
Size:
pp. 495-497
Announcement Date:

Citation Formats

Mallik, S. Operator product expansion and its thermal average. Netherlands: N. p., 1998. Web. doi:10.1016/S0920-5632(97)01113-4.
Mallik, S. Operator product expansion and its thermal average. Netherlands. doi:10.1016/S0920-5632(97)01113-4.
Mallik, S. 1998. "Operator product expansion and its thermal average." Netherlands. doi:10.1016/S0920-5632(97)01113-4. https://www.osti.gov/servlets/purl/10.1016/S0920-5632(97)01113-4.
@misc{etde_686181,
title = {Operator product expansion and its thermal average}
author = {Mallik, S}
abstractNote = {QCD sum rules at finite temperature, like the ones at zero temperature, require the coefficients of local operators, which arise in the short distance expansion of the thermal average of two-point functions of currents. We extend the configuration space method, applied earlier at zero temperature, to the case at finite temperature. We find that, upto dimension four, two new operators arise, in addition to the two appearing already in the vacuum correlation functions. It is argued that the new operators would contribute substantially to the sum rules, when the temperature is not too low. (orig.) 7 refs.}
doi = {10.1016/S0920-5632(97)01113-4}
journal = {Nuclear Physics B, Proceedings Supplements}
volume = {64}
journal type = {AC}
place = {Netherlands}
year = {1998}
month = {May}
}