About the creation of proton-anti-proton pair at electron-positron collider in the energy range of the mass Psi(3770)
classification
✦ hep-ph
keywords
interferencepairstateannihilationapproxcolliderconsideredcontributions
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The process of electron--positron annihilation into proton--antiproton pair is considered within the vicinity of $\psi(3770)$ resonance. The interference between the pure electromagnetic intermediate state and the $\psi(3770)$ state is evaluated. It is shown that this interference is destructive and the relative phase between these two contributions is large ($\phi_0 \approx 250^o$).
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