Abstract
We determine the magnetic dipole moment of the rho meson using preliminary data from the BaBar Collaboration for the e+e- → π+π-2π0 process, in the center of mass energy range from 0.9 to 2.2 GeV. We describe the γ* → 4π vertex using a vector meson dominance model, including all intermediate resonance contributions. We find that μρ = 2.1 ± 0.5 [e/2mρ].
Highlights
There is no measurement of the magnetic dipole moment (MDM) of any vector meson.[1]
Alternatives to determine the MDM, by indirect means, invoke the fact that the radiation emitted from the vector meson carries information of its electromagnetic structure[2] and provided the dominant electric radiation is known, the subleading MDM effect can be identified
The γ∗ → 4π vertex is modeled in the vector meson dominance (VMD) approach
Summary
There is no measurement of the magnetic dipole moment (MDM) of any vector meson.[1]. Alternatives to determine the MDM, by indirect means, invoke the fact that the radiation emitted from the vector meson carries information of its electromagnetic structure[2] and provided the dominant electric radiation is known, the subleading MDM effect can be identified.
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