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arXiv · hep-ph/9908252

The 7/11 rule: an estimate of m_rho/f_pi

M. Golterman·S. Peris
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Abstract

We derive an estimate for the ratio of the rho mass and the pion decay constant from an analysis of vector and axial-vector two-point functions using large-Nc, lowest-meson dominance and the operator product expansion, in the chiral limit. We discuss the extension of this analysis to the scalar and pseudoscalar sector. Furthermore, this leads to a successful parameter-free determination of the L_i couplings of the chiral Lagrangian if an improved Nambu-Jona-Lasinio ansatz for Green functions is assumed at low energies.

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M. Golterman, S. Peris. 1999-09-21. The 7/11 rule: an estimate of m_rho/f_pi. https://doi.org/10.1103/physrevd.61.034018

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