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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
Roy, P
Park, S
Crede, V
Anisovich, AV
Klempt, E
Nikonov, VA
Sarantsev, AV
Wei, NC
Huang, F
Nakayama, K
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2019-04-23
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10.1103/PhysRevLett.122.162301
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© 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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