Search for N Delta Resonance State Via the Exclusive Measurement of gamma d -> d pi (+)pi (-) Reaction

We investigate the gamma d -> d pi (+) pi (-) reaction for a study of a possible N Delta dibaryon state using a deuterium target with a magnetic spectrometer, Neutral Kaon Spectrometer 2 (NKS2), at Research Center for Electron Photon Science (ELPH), Tohoku University. The incident photon energy ranged from 0.78 to 1.08 GeV. Resonance-like structures were found at a mass of similar to 2.15 GeV/c(2) with a width of similar to 0.1 GeV/c(2) in the d pi (+) and d pi (-) invariant mass spectra.