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<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mn>1</mml:mn><mml:mo stretchy="false">/</mml:mo><mml:msub><mml:mi>N</mml:mi><mml:mi>c</mml:mi></mml:msub></mml:math> approximation and universality of vector mesons
In this work, we argue that the observed differences in the value of the vector coupling constant extracted from the decays $\ensuremath{\rho}\ensuremath{\rightarrow}\ensuremath{\pi}\ensuremath{\pi}$ (${g}_{\ensuremath{\rho}}=6.0$), $\ensuremath{\rho}\ensuremath{\rightarrow}{l}^{+}{l}^{\ensuremath{-}}$ (${g}_{\ensuremath{\rho}}=5.0$) and $\ensuremath{\omega}\ensuremath{\rightarrow}{l}^{+}{l}^{\ensuremath{-}}$ (${g}_{\ensuremath{\rho}}=5.7$), where $l=e$, $\ensuremath{\mu}$, are an indication of the important role played by the $1/{N}_{c}$ corrections in the description of these processes. We …