New possibility for further measurements of nucleon form factors at large momentum transfer in time-like region: $\bar{p}+{p}\to \ell^+ +\ell^-$, $\ell=e$ or $\mu$

TL;DR

This paper discusses new methods to measure nucleon form factors at high momentum transfer using antiproton-proton annihilation into lepton pairs, emphasizing angular and polarization observables for future experiments.

Contribution

It introduces a novel approach to study nucleon form factors in the time-like region through angular and polarization measurements in antiproton-proton collisions.

Findings

Potential to improve measurements of nucleon form factors at large momentum transfer.

Analysis of angular dependence of differential cross sections.

Exploration of polarization effects in future experiments.

Abstract

We briefly summarize the status with electromagnetic nucleon form factors, and give in this framework, arguments to study the angular dependence of the differential cross section and single-spin polarization phenomena (polarized target or polarized beam) in $\bar{p}+{p}\to \ell^++\ell^-$, in view of the availability of future antiproton beams.