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

P Roy,D Riser,L Lanza,S Boiarinov,N Sparveris,B Mckinnon,M Battaglieri,N Zachariou,A Filippi,M Khachatryan,E Pasyuk,S Fegan,K Hafidi,T Mineeva,P Eugenio,G Angelini,O Cortes,P Chatagnon,B Torayev,A Celentano,C Carlin,V Mokeev,A El Alaoui,B Duran,Y Prok,K Nakayama,M Ripani,H Avakian,F Cao,D Jenkins,M Taiuti,D Protopopescu,M Paolone,D Sokhan,E Klempt,O Pogorelko,M Guidal,A Deur,T Chetry,L Barion,H Voskanyan,J Brock,G Ciullo,Y Ilieva,L El Fassi,J Pierce,E Golovatch,A Rizzo,V Kubarovsky,R Wang,G Niculescu,J Zhang,C Hanretty,Iu Skorodumina,S Park,E Voutier,D Heddle,M Khandaker,G Rosner,C Salgado,A Khanal,D Keller,A Kim,N Dashyan,C Djalali,A D’Angelo,M Ungaro,E De Sanctis,M Holtrop,F Sabatié,P Lenisa,I Bedlinskiy,L Guo,N Harrison,A Fradi,W Kim,R Paremuzyan,S Johnston,S Niccolai,W Phelps,G Khachatryan,M Hattawy,A Movsisyan,S Adhikari,S Strauch,M Contalbrigo,R De Vita,K Livingston,M Osipenko,M Dugger,D Marchand,H Egiyan,K Hicks,S Joosten,M Ehrhart,T B Hayward ,I J D Macgregor ,R Dupré ,J A Tan ,R A Schumacher ,Michael Kunkel ,S Kuleshov ,A I Ostrovidov ,B G Ritchie ,Neng-Chang Wei ,P Nadel-Turoński ,C Keith ,David Payette ,Fei Huang ,G P Gilfoyle ,D P Watts ,C A Meyer ,R A Montgomery ,E L Isupov ,O Soto ,M H Wood ,B S Ishkhanov ,R Gothe ,A S Biselli ,D G Ireland ,D S Carman ,Stefan Diehl ,M L Kabir ,Frank Klein ,D Meekins ,K P Adhikari ,N K Walford ,N J C Tyler ,K A Griffioen ,P L Cole ,Xin Wei ,V D Burkert ,I I Strakovsky ,F X Girod ,L L Pappalardo ,C Muñoz Camacho ,V A Nikonov ,W J Briscoe ,W K Brooks ,V Credé ,A Sarantsev ,H S Jo ,B A Raue ,A V Anisovich ,Uttam Shrestha ,M L Seely ,Y G Sharabian ,Z W Zhao

doi:10.1103/physrevlett.122.162301

Abstract

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 1200-2700MeV, and the beam-target asymmetries H and P have been measured using linearly polarized, tagged photons in the energy range 1200-2000MeV. 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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