First Measurements of the Double-Polarization Observables F, P, and H in ω Photoproduction off Transversely Polarized Protons in the N∗ Resonance Region
© 2019 American Physical Society. First measurements of double-polarization observables in ω photoproduction off the proton are presented using transverse target polarization and data from the CEBAF Large Acceptance Spectrometer (CLAS) FROST experiment at Jefferson Lab. The beam-target asymmetry F has been measured using circularly polarized, tagged photons in the energy range 1200-2700 MeV, and the beam-target asymmetries H and P have been measured using linearly polarized, tagged photons in the energy range 1200-2000 MeV. These measurements significantly increase the database on polarization observables. The results are included in two partial-wave analyses and reveal significant contributions from several nucleon (N∗) resonances. In particular, contributions from new N∗ resonances listed in the Review of Particle Properties are observed, which aid in reaching the goal of mapping out the nucleon resonance spectrum.
Roy, P.; Park, S.; Crede, V.; Anisovich, A. V.; Klempt, E.; Nikonov, V. A.; Sarantsev, A. V.; Wei, N. C.; Huang, F.; Nakayama, K.; Adhikari, K. P.; Adhikari, S.; Angelini, G.; Avakian, H.; Barion, L.; Battaglieri, M.; Bedlinskiy, I.; Biselli, A. S.; Boiarinov, S.; Briscoe, W. J.; Brock, J.; Brooks, W. K.; Burkert, V. D.; Cao, F.; Carlin, C.; Carman, D. S.; Celentano, A.; Chetry, T.; Djalali, C.; Hicks, K.; and Shrestha, U., "First Measurements of the Double-Polarization Observables F, P, and H in ω Photoproduction off Transversely Polarized Protons in the N∗ Resonance Region" (2019). Physics & Astronomy Open Access Publications. 39.