RHO-OMEGA MIXING VIA QCD SUM-RULES WITH FINITE MESONIC WIDTHS

Citation
Mj. Iqbal et al., RHO-OMEGA MIXING VIA QCD SUM-RULES WITH FINITE MESONIC WIDTHS, Physics letters. Section B, 386(1-4), 1996, pp. 55-61
Citations number
23
Categorie Soggetti
Physics
Journal title
ISSN journal
03702693
Volume
386
Issue
1-4
Year of publication
1996
Pages
55 - 61
Database
ISI
SICI code
0370-2693(1996)386:1-4<55:RMVQSW>2.0.ZU;2-Y
Abstract
Based on the analysis of both Borel and Finite-Energy QCD sum rules, t he inclusion of finite mesonic widths leads to a dramatic effect on th e predictions for the momentum dependence of the rho - omega mixing ma trix element, It is shown that the rho - omega mixing matrix element t raditionally discussed in the literature, has the same sign and simila r magnitude in the space-like region as its on-shell value, This contr asts the zero-width result where the mixing matrix element is typicall y of opposite sign in the space-like region.