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arxiv: 0708.3256 · v1 · submitted 2007-08-23 · ✦ hep-ph

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The width difference of rho vector mesons

F. V. Flores-Baez , G. Lopez Castro , G. Toledo Sanchez
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classification ✦ hep-ph
keywords differencemesonsbreakingchargeddeltagammaisospinmass
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We compute the difference in decay widths of charged and neutral \rho(770) vector mesons. The isospin breaking arising from mass differences of neutral and charged \pi and \rho mesons, radiative corrections to \rho -> \pi\pi, and the \rho -> \pi\pi\gamma decays are taken into account. It is found that the width difference \Delta \Gamma_rho is very sensitive ot the isospin breaking in the $\rho$ meson mass \Delta m_\rho. This result can be useful to test the correlations observed between the values of these parameters extracted from experimental data.

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Cited by 1 Pith paper

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  1. The anomalous magnetic moment of the muon in the Standard Model: an update

    hep-ph 2025-05 accept novelty 5.0

    The updated SM prediction for the muon anomalous magnetic moment is 116592033(62)×10^{-11}, showing no tension with the experimental average of 38(63)×10^{-11}.