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, AV; Klempt, E; Nikonov, VA; Sarantsev, AV; Wei, NC; Huang, F; Nakayama, K; Adhikari, KP; Adhikari, S; Angelini, G; Avakian, H; Barion, L; Battaglieri, M; Bedlinskiy, I; Biselli, AS; Boiarinov, S; Briscoe, WJ; Brock, J; Brooks, WK; Burkert, VD; Cao, F; Carlin, C; Carman, DS; Celentano, A; Chatagnon, P; Chetry, T; Ciullo, G; Cole, PL; 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, GP; Girod, FX; Golovatch, E; Gothe, RW; Griffioen, KA; Guidal, M; Guo, L; Hafidi, K; Hanretty, C; Harrison, N; Hattawy, M; Hayward, TB; Heddle, D; Hicks, K; Holtrop, M; Ilieva, Y; Ireland, DG; Ishkhanov, BS; Isupov, EL; Jenkins, D; Jo, HS; Johnston, S; Joosten, S; Kabir, ML; Keith, CD; Keller, D; Khachatryan, G; Khachatryan, M; Khanal, A; Khandaker, M; Kim, A; Kim, W; Klein, FJ; Kubarovsky, V; Kuleshov, SV; Kunkel, MC; Lanza, L; Lenisa, P; Livingston, K; MacGregor, IJD; Marchand, D; McKinnon, B; Meekins, DG; Meyer, CA; Mineeva, T; Mokeev, V; Montgomery, RA; Movsisyan, A; Munoz Camacho, C

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Date

2019-04-23

Author

Roy, P
Park, S
Crede, V
Anisovich, AV
Klempt, E
Nikonov, VA
Sarantsev, AV
Wei, NC
Huang, F
Nakayama, K

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DOI

10.1103/PhysRevLett.122.162301

Abstract

© 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.

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Physical Review Letters

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