First Measurements of the Double-Polarization Observables F, P, and H in ω Photoproduction off Transversely Polarized Protons in the N∗ Resonance Region

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.; Chatagnon, P.; Chetry, T.; Ciullo, G.; Cole, P. L.; Contalbrigo, M.; Cortes, O.; D'Angelo, A.; Dashyan, N.; De Vita, R.; De Sanctis, E.; Deur, A.; Diehl, S.; Djalali, C.; Dugger, M.; Dupre, R.; Duran, B.; Egiyan, H.; Ehrhart, M.; El Alaoui, A.; El Fassi, L.; Eugenio, P.; Fegan, S.; Filippi, A.; Fradi, A.; Gilfoyle, G. P.; Girod, F. X.; Golovatch, E.; Gothe, R. W.; Griffioen, K. A.; Guidal, M.; Guo, L.; Hafidi, K.; Hanretty, C.; Harrison, N.; Hattawy, M.; Hayward, T. B.; Heddle, D.; Hicks, K.; Holtrop, M.; Ilieva, Y.; Ireland, D. G.; Ishkhanov, B. S.; Isupov, E. L.; Jenkins, D.; H. S., Jo; Johnston, S.; Joosten, S.; Kabir, M. L.; Keith, C. D.; Keller, D.; Khachatryan, G.; Khachatryan, M.; Khanal, A.; Khandaker, M.; Kim, A.; Kim, W.; Klein, F. J.; Kubarovsky, V.; Kuleshov, S. V.; Kunkel, M. C.; Lanza, L.; Lenisa, P.; Livingston, K.; Macgregor, I. J. D.; Marchand, D.; Mckinnon, B.; Meekins, D. G.; Meyer, C. A.; Mineeva, T.; Mokeev, V.; Montgomery, R. A.; Movsisyan, A.; Munoz Camacho, C.; Nadel-Turonski, P.; Niccolai, S.; Niculescu, G.; Osipenko, M.; Ostrovidov, A. I.; Paolone, M.; Pappalardo, L. L.; Paremuzyan, R.; Pasyuk, E.; Payette, D.; Phelps, W.; Pierce, J.; Pogorelko, O.; Prok, Y.; Protopopescu, D.; Raue, B. A.; Ripani, M.; Riser, D.; Ritchie, B. G.; Rizzo, A.; Rosner, G.; Sabatie, F.; Salgado, C.; Schumacher, R. A.; Seely, M. L.; Sharabian, Y. G.; Shrestha, U.; Skorodumina, I.; Sokhan, D.; Soto, O.; Sparveris, N.; Strakovsky, I. I.; Strauch, S.; Taiuti, M.; Tan, J. A.; Torayev, B.; Tyler, N.; Ungaro, M.; Voskanyan, H.; Voutier, E.; Walford, N. K.; Wang, R.; Watts, D. P.; Wei, X.; Wood, M. H.; Zachariou, N.; Zhang, J.; Zhao, Z. W.

doi:10.1103/PhysRevLett.122.162301

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.