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