A study of the $\gamma d \rightarrow \pi^+\pi^-d$ reaction

This study investigates a recently-observed $N\Delta$ ($d^*$) resonance decaying to $\pi d$ final state using CLAS at Jefferson Lab, Virginia. Tagged photons with beam energies between 0.8 and 3.6 GeV were produced using the bremsstrahlung process incident on a liquid deuterium target. The final state particles detected were an energetic deuteron and a two oppositely charged pions. The $d^*$ resonance has been seen in other preliminary analyses at CLAS. Partial-wave analysis of pion-deuteron scattering has also shown a resonance at a mass of about 2145 MeV. A preliminary differential cross section measurement of this resonance will be presented.