New Results on the $\pi^{+}\pi^{-}$ Electroproduction Cross Sections off Protons

TL;DR

This paper reports new measurements of $^{+}^{-}$ electroproduction cross sections off protons, expanding the kinematic range and providing finer $Q^2$ binning to improve understanding of nucleon resonance electrocouplings.

Contribution

It extends previous measurements by covering a broader kinematic range and finer $Q^2$ bins, enabling better analysis of nucleon resonance structures.

Findings

Extended kinematic coverage for $^{+}^{-}$ electroproduction

Finer $Q^2$ binning of cross sections

Future analysis will improve knowledge of resonance electrocouplings

Abstract

In these proceedings we present preliminary $\pi^{+}\pi^{-}$ electroproduction cross sections off protons in the kinematical area of 1.4 GeV $< W <$ 1.8 GeV and 0.4 GeV$^{2}$ $< Q^{2} < 1.1$ GeV$^{2}$. Our results extend the kinematical coverage for this exclusive channel with respect to previous measurements. Furthermore, the $\pi^{+}\pi^{-}$ electroproduction cross sections were obtained for $Q^2$-bins of much smaller size. The future analysis of this data within the framework of the JLAB-MSU reaction model (JM) will considerably improve our knowledge on the $Q^2$ evolution of the transition $\gamma_{v}NN^*$ electrocouplings, in particular for the resonances with masses above 1.6 GeV.