Publication Date

1997

Journal or Book Title

PHYSICAL REVIEW LETTERS

Abstract

A new calculation of the isospin and hypercharge axial-vector current propagators [ ΔA33μν(q2) and ΔA88μν(q2)] to two loops in SU(3)×SU(3) chiral perturbation theory is used to derive chiral spectral function sum rules valid to second order in the light quark masses. Explicit forms are given for the three-pion isospin axial-vector spectral functions at low energy, and application of the sum rules to the determination of counterterms of the chiral Lagrangian is discussed.

Comments

This is the pre-published version achieved from ArXiv. The published version is located at http://prl.aps.org/abstract/PRL/v79/i21/p4092_1

Volume

79

Pages

4092-4095

Issue

21

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