Speaker
Genaro Toledo
(Instituto de Física, UNAM)
Description
We present the first determination of the magnetic dipole moment of the $\rho$ and $K^*$ vector mesons, based on data from the BaBar Collaboration. We analyze the $e^{+} e^{-} \to \pi^+ \pi^- 2 \pi^0$ and $e^{+} e^{-} \to K^+ K^- 2 \pi^0$ processes which are sensitive to this parameter. We describe the $\gamma^* \to hadrons$ vertex using a vector meson dominance model, including the relevant intermediate resonant contributions. We find $\mu_\rho = 2.7 \pm 0.3 $ in $e/2 m_\rho$ units for the $\rho$ and $\mu_{K*} = 4.5 $ in $e/2 m_{K*}$ units. For this last, we stress the need for higher precision data to extract a more precise value of this parameter to confront it with theoretical predictions.
| Academic position of the presenting author | Professor |
|---|
Primary author
Genaro Toledo
(Instituto de Física, UNAM)
Co-authors
Dr
Antonio Rojas
(IFUNAM)
Mr
Luis A. Jiménez Pérez
(IFUNAM)
