Abstract

We reexamine the genuine Borel QCD sum rules for the $\ensuremath{\rho}$ and $\ensuremath{\varphi}$ mesons using a simple numerical method to flatten the sum-rule ${M}^{2}$ dependence in a wide range of ${M}^{2}$. Following Das et al., the imaginary part of the corresponding polarization operator is written in terms of the pion or kaon electromagnetic form factor, which we parametrize by means of simple formulas obeying requirements of analyticity and depending on the mass, the width, and the vector-meson-dominance coupling-constant ratio for the given vector meson. The determined resonance parameters are close to their experimental values. Furthermore, the influence of the "nonstandard" values of the gluon and four-quark condensates on the vector-meson properties is also studied.

Full Text
Paper version not known

Talk to us

Join us for a 30 min session where you can share your feedback and ask us any queries you have

Schedule a call

Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.