Form factors for the Nucleon-to-Roper electromagnetic transition at large-$Q^2$

TL;DR

This paper presents a Poincaré covariant calculation of nucleon-to-Roper electromagnetic transition form factors across a wide range of momentum transfers, providing predictions for upcoming experiments.

Contribution

It offers the first comprehensive calculation of Roper transition form factors up to high Q^2 using a covariant three-body approach and analytic continuation methods.

Findings

Reliable form factor calculations up to Q^2/m_N^2=6

Extended predictions up to Q^2/m_N^2≈12

Provides data for upcoming experimental measurements

Abstract

We report on a recent calculation of all Roper-related electromagnetic transtions form factors, covering the range of energies that next-to-come planned experiments are expected to map. Direct reliable calculations were performed, within a Poincar\'e covariant approach of the three-body bound-state problem, up to $Q^2/m^2_N$=6; approximated then by applying the Schlessinger point method and the results eventually extended up to $Q^2/m^2_N\simeq$12 via analytic continuation.