Photoproduction of two charged pions off protons in the resonance region

TL;DR

This paper investigates the photoproduction of charged pion pairs off protons in the 1.6 to 2.4 GeV energy range, providing data crucial for understanding nucleon and Delta resonance structures.

Contribution

It offers new experimental data and analysis methods to determine resonance branching fractions using the CLAS detector at Jefferson Lab.

Findings

Branching ratios for nucleon and Delta resonances are extracted.

Data enhances the understanding of resonance decay channels.

The analysis improves the accuracy of resonance property measurements.

Abstract

Photoproduction of charged pions pairs off protons is studied within the invariant masses of the final state hadrons from 1.6 to 2.4 GeV at the Thomas Jefferson National Accelerator Facility with the CLAS detector. The data are included in the Bonn-Gatchina coupled-channel analysis and provide the information necessary to determine the branching fractions for most known nucleon and Delta resonances. Branching ratios are obtained here from an event based likelihood fit.