Weinberg-Type Sum Rules at Zero and Finite Temperature

Details Weinberg-Type Sum Rules at Zero and Finite Temperature Weinberg-Type Sum Rules at Zero and Finite Temperature

1993-12-08

arxiv.org/abs/hep-ph/9312245v1

Phys.Rev. D49 (1994) 4694-4704

Physics

High Energy Physics

High Energy Physics - Phenomenology

Scientific paper

10.1103/PhysRevD.49.4694

We consider sum rules of the Weinberg type at zero and nonzero temperatures. On the basis of the operator product expansion at zero temperature we obtain a new sum rule which involves the average of a four-quark operator on one side and experimentally measured spectral densities on the other. We further generalize the sum rules to finite temperature. These involve transverse and longitudinal spectral densities at each value of the momentum. Various scenarios for the relation between chiral symmetry restoration and these finite temperature sum rules are discussed.

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