1305.6345 (D. García Gudiño et al.)

Determination of the magnetic dipole moment of the rho meson    [PDF]

D. García Gudiño, G. Toledo Sánchez

We determine the magnetic dipole moment of the rho meson using preliminary data from the BaBar Collaboration for the e^+ e^- \to \pi^+ \pi^- 2 \pi^0 process, in the center of mass energy range from 0.9 to 2.2 GeV. We describe the \gamma^* \to 4\pi vertex using a vector meson dominance model, including all intermediate resonance contributions. We find that {\mu}_\rho = 2.1 \pm 0.5 \: [e/2 m_\rho]. In addition, we obtain the branching ratio BR(\rho^0 \to \pi^+ \pi^- 2 \pi^0) = 1.7 \pm 0.6 \times 10^{-5} .

View original: http://arxiv.org/abs/1305.6345