Recent results on nucleon resonance electrocouplings from the studies of $\pi^{+}\pi^{-}p$ electroproduction with the CLAS detector

TL;DR

This paper reports recent findings on nucleon resonance electrocouplings derived from $ ext{π}^+ ext{π}^- ext{p}$ electroproduction data collected with the CLAS detector, advancing understanding of nucleon structure in specific kinematic regions.

Contribution

It presents the first extraction of electrocouplings for several excited proton states below 1.8 GeV from $ ext{π}^+ ext{π}^- ext{p}$ electroproduction data.

Findings

Determined all key contributing mechanisms in the studied kinematic range.

Separated resonant and non-resonant parts of the cross sections.

First-time extraction of electrocouplings for certain excited proton states.

Abstract

Recent results on nucleon resonance studies in $\pi^{+}\pi^{-}p$ electro- production off protons with the CLAS detector are presented. The analysis of CLAS data allowed us to determine all essential contributing mechanisms, providing a credible separation between resonant and non-resonant parts of the cross sections in a wide kinematical area of invariant masses of the final hadronic system $1.3<W<1.8$ GeV and photon virtualities $0.2<Q^{2}<1.5$ $GeV^2$. Electrocouplings of several excited proton states with masses less than 1.8 GeV were obtained for the first time from the analysis of $\pi^{+}\pi^{-}p$ exclusive electroproduction channel.