Does $J/ψ\rightarrow π^{+} π^{-}$ fix the Electromagnetic Form Factor $F_π(t)$ at $t=M_{J/ψ}^2$?

Details Does $J/ψ\rightarrow π^{+} π^{-}$ fix the Electromagnetic Form Factor $F_π(t)$ at $t=M_{J/ψ}^2$? Does $J/ψ\rightarrow π^{+} π^{-}$ fix the Electromagnetic Form Factor $F_π(t)$ at $t=M_{J/ψ}^2$?

1993-07-08

arxiv.org/abs/hep-ph/9307233v1

Phys.Rev.Lett. 71 (1993) 2533-2536

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages revtex manuscript, one figure--not included, U. of MD PP #94-001

Scientific paper

10.1103/PhysRevLett.71.2533

We show that the $J/\psi \rightarrow \pi^{+} \pi^{-}$ decay is a reliable source of information for the electromagnetic form factor of the pion at $t=M_{J/\psi}^2=9.6 {\rm GeV}^2$ by using general arguments to estimate, or rather, put upper bounds on, the background processes that could spoil this extraction. We briefly comment on the significance of the resulting $F_{\pi}(M_{J/\psi}^2)$.

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