About the creation of proton-anti-proton pair at electron-positron collider in the energy range of the mass $\Psi(3770)$

TL;DR

This paper investigates the electron-positron annihilation process near the $ ext{Psi}(3770)$ resonance, focusing on the destructive interference between electromagnetic and resonance states, revealing a large phase difference.

Contribution

It provides a detailed analysis of the interference effects and phase relations in proton-antiproton pair production at the $ ext{Psi}(3770)$ energy range.

Findings

Interference between electromagnetic and resonance states is destructive.

The relative phase between contributions is approximately 250 degrees.

The study enhances understanding of proton-antiproton production mechanisms.

Abstract

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 ($\phi_0 \approx 250^o$).