Four-quark condensates in open-charm chiral QCD sum rules

TL;DR

This paper discusses the role of four-quark condensates in open-charm chiral QCD sum rules, focusing on technical aspects like divergence cancellation and the inclusion of higher-dimension condensates at finite density and temperature.

Contribution

It provides detailed methods for incorporating four-quark condensates beyond factorization in chiral QCD sum rules at finite density and temperature.

Findings

Clarifies cancellation of infrared divergences.

Details methods for including higher-dimension condensates.

Supports analysis of chiral partner mesons in hot/dense matter.

Abstract

Recently, in Hilger et al. (2011) [1] QCD sum rules for chiral partners in the open-charm meson sector have been presented at nonzero baryon net density or temperature up to and including mass dimension 5. Referring to this, details concerning the cancelation of infrared divergences are presented and important technical and conceptional ingredients for an incorporation of four-quark condensates beyond factorization and of other mass dimension 6 condensates are collected.