Physical Review C
035204 (20 pp.)
The quasifree γd→π-p(p) differential cross section has been measured with CLAS at photon beam energies Eγ from 0.445 to 2.510 GeV (corresponding to W from 1.311 to 2.366 GeV) for pion center-of-mass angles cosθπc.m. from -0.72 to 0.92. A correction for final state interactions has been applied to these data to extract the γn→π-p differential cross sections. These cross sections are quoted in 8428 (Eγ,cosθπc.m.) bins, a factor of nearly 3 increase in the world statistics for this channel in this kinematic range. These new data help to constrain coupled-channel analysis fits used to disentangle the spectrum of N∗ resonances and extract their properties. Selected photon decay amplitudes N∗→γn at the resonance poles are determined for the first time and are reported here. © 2017 American Physical Society.
Original Publication Citation
Mattione, P. T., Carman, D. S., Strakovsky, I. I., Workman, R. L., Kudryavtsev, A. E., Svarc, A., . . . Zhao, Z. W. (2017). Differential cross section measurements for γn→π-p above the first nucleon resonance region. Physical Review C, 96(3), 035204. doi:10.1103/PhysRevC.96.035204
Mattione, P. T.; Carman, D. S.; Strakovsky, I. I.; Workman, R. L.; Kudryavtsev, A. E.; Svarc, A.; Tarasov, V. E.; Adhikari, K. P.; Adhikari, S.; Adikaram, D.; Charles, G.; Khachatryan, M.; Klein, A.; Prok, Y.; and Zhao, Z. W., "Differential Cross Section Measurements for γn→π-p Above the First Nucleon Resonance Region" (2017). Physics Faculty Publications. 80.