Meson-Photon Transition Form Factors in the Charmonium Energy Range

Details Meson-Photon Transition Form Factors in the Charmonium Energy Range Meson-Photon Transition Form Factors in the Charmonium Energy Range

2009-03-10

arxiv.org/abs/0903.1796v3

Phys.Rev.D79:097301,2009

Physics

High Energy Physics

High Energy Physics - Phenomenology

7 pages, to be submitted to Phys. Rev. D. Version referring to new CLEO data

Scientific paper

10.1103/PhysRevD.79.097301

The study of electron-positron collisions at center-of-mass energies corresponding to charmonium production has reached new levels of sensitivity thanks to experiments by the BES and CLEO Collaborations. Final states $\gamma P$, where $P$ is a pseudoscalar meson such as $\pi^0$, $\eta$, and $\eta'$ can arise either from charmonium decays or in the continuum through a virtual photon: $e^+ e^- \to \gamma^* \to \gamma P$. Estimates of this latter process are given at center-of-mass (c.m.) energies corresponding to the $J/\psi(1S)$, $\psi(2S)$, and $\psi(3770)$ resonances.

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