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

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

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...

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Veröffentlicht in:	Physical review letters 2019-04, Vol.122 (16), p.162301-162301, Article 162301
Hauptverfasser:	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, Jo, H S, 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
Format:	Artikel
Sprache:	eng
Schlagworte:	Circular polarization color confinement High Energy Physics - Experiment Linear polarization Mapping Nuclear Experiment NUCLEAR PHYSICS AND RADIATION PHYSICS particle sources & targets Photons photonuclear reactions Photoproduction Physics polarization phenomena QCD in nuclear reactions resonance reactions
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Zusammenfassung:	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.
ISSN:	0031-9007 1079-7114
DOI:	10.1103/PhysRevLett.122.162301