Publication Date

1996

Journal or Book Title

PHYSICAL REVIEW D

Abstract

A general class of inverse-moment sum rules was previously derived by the authors in a chiral perturbation theory (ChPT) study at two-loop order of the isospin and hypercharge vector-current propagators. Here, we address the evaluation of the inverse-moment sum rules in terms of existing data and theoretical constraints. Two kinds of sum rules are seen to occur: those which contain as-yet undetermined O(q6) counterterms and those free of such quantities. We use the former to obtain phenomenological evaluations of two O(q6) counterterms. Light is shed on the important but difficult issue regarding contributions of higher orders in the ChPT expansion.

Comments

This is the pre-published version achieved from ArXiv. The published version is located at http://prd.aps.org/abstract/PRD/v53/i5/p2651_1

Volume

53

Pages

2651-2657

Issue

5

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