Determination of in the Chiral Limit

Preprint

13 September 2001

preprint
Published by arXiv in arXiv

https://doi.org/10.48550/arXiv.hep-ph/0109113

Abstract

We reconsider the dispersive evaluation of the weak matrix elements in the chiral limit. The perturbative matching is accomplished fully within the scheme dependence used in the two loop weak OPE calculations. The effects of dimension eight (and higher dimension) operators are fully accounted for. We perform a numerical determination of the weak matrix elements using our dispersive sum rules fortified by constraints from the classical chiral sum rules. A careful assessment of the attendant uncertainties is given.

Keywords

DISPERSIVE EVALUATION
MATRIX ELEMENTS
UNCERTAINTIES
CHIRAL LIMIT
WEAK MATRIX
SUM RULES
2PI

All Related Versions

Version 1, 2001-09-13, ArXiv
Published version: Physics Letters B, 522 (3-4), 245.

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