Measurement of the beam asymmetry Sigma and the target asymmetry T in the photoproduction of omega mesons off the proton using CLAS at Jefferson Laboratory

Academic Article

Abstract

  • The photoproduction of $\omega$ mesons off the proton has been studied in the reaction $\gamma p\to p\,\omega$ using the CEBAF Large Acceptance Spectrometer (CLAS) and the frozen-spin target (FROST) in Hall B at the Thomas Jefferson National Accelerator Facility. For the first time, the target asymmetry, $T$, has been measured in photoproduction from the decay $\omega\to\pi^+\pi^-\pi^0$, using a transversely-polarized target with energies ranging from just above the reaction threshold up to 2.8 GeV. Significant non-zero values are observed for these asymmetries, reaching about 30-40% in the third-resonance region. New measurements for the photon-beam asymmetry, $\Sigma$, are also presented, which agree well with previous CLAS results and extend the world database up to 2.1 GeV. These data and additional $\omega$-photoproduction observables from CLAS were included in a partial-wave analysis within the Bonn-Gatchina framework. Significant contributions from $s$-channel resonance production were found in addition to $t$-channel exchange processes.
  • Authors

  • Roy, P
  • Akbar, Z
  • Park, S
  • Crede, V
  • Anisovich, AV
  • Denisenko, I
  • Klempt, E
  • Nikonov, VA
  • Sarantsev, AV
  • Adhikari, KP
  • Adhikari, S
  • Pereira, S Anefalos
  • Ball, J
  • Balossino, I
  • Bashkanov, M
  • Battaglieri, M
  • Batourine, V
  • Bedlinskiy, I
  • Biselli, AS
  • Boiarinov, S
  • Briscoe, WJ
  • Brock, J
  • Brooks, WK
  • Burkert, VD
  • Carlin, C
  • Carman, DS
  • Celentano, A
  • Charles, G
  • Chetry, T
  • Ciullo, G
  • Clary, BA
  • Cole, PL
  • Contalbrigo, M
  • D'Angelo, A
  • Dashyan, N
  • De Vita, R
  • Deur, A
  • Djalali, C
  • Dugger, M
  • Dupre, R
  • El Alaoui, A
  • El Fassi, L
  • Elouadrhiri, L
  • Eugenio, P
  • Fedotov, G
  • Fegan, S
  • Filippi, A
  • Fradi, A
  • Gavalian, G
  • Gevorgyan, N
  • Gilfoyle, GP
  • Giovanetti, KL
  • Girod, FX
  • Gleason, C
  • Gohn, W
  • Golovatch, E
  • Gothe, RW
  • Griffioen, KA
  • Guidal, M
  • Guo, L
  • Hafidi, K
  • Hakobyan, H
  • Hanretty, C
  • Hattawy, M
  • Hicks, K
  • Holtrop, Maurik
  • Ilieva, Y
  • Ireland, DG
  • Ishkhanov, BS
  • Isupov, EL
  • Jenkins, D
  • Joo, K
  • Joosten, S
  • Keith, CD
  • Keller, D
  • Khachatryan, G
  • Khandaker, M
  • Kim, A
  • Kim, W
  • Klein, A
  • Klein, FJ
  • Kubarovsky, V
  • Kuleshov, SV
  • Lanza, L
  • Lenisa, P
  • Livingston, K
  • Lu, HY
  • MacGregor, IJD
  • Markov, N
  • Mayer, M
  • McCracken, ME
  • McKinnon, B
  • Meekins, DG
  • Meyer, CA
  • Meziani, ZE
  • Mineeva, T
  • Mokeev, V
  • Montgomery, RA
  • Movsisyan, A
  • Camacho, C Munoz
  • Nadel-Turonski, P
  • Niccolai, S
  • Niculescu, G
  • Osipenko, M
  • Ostrovidov, AI
  • Paremuzyan, R
  • Park, K
  • Pasyuk, E
  • Phelps, E
  • Phelps, W
  • Pierce, JJ
  • Pogorelko, O
  • Price, JW
  • Procureur, S
  • Prok, Y
  • Protopopescu, D
  • Raue, BA
  • Ripani, M
  • Riser, D
  • Ritchie, BG
  • Rizzo, A
  • Rosner, G
  • Sabatie, F
  • Salgado, C
  • Schumacher, RA
  • Sharabian, YG
  • Skorodumina, Iu
  • Smith, GD
  • Sober, DI
  • Sokhan, D
  • Sparveris, N
  • Stepanyan, S
  • Strakovsky, II
  • Strauch, S
  • Taiuti, M
  • Tan, JA
  • Torayev, B
  • Ungaro, M
  • Voutier, E
  • Walford, NK
  • Watts, DP
  • Wei, X
  • Wood, MH
  • Zachariou, N
  • Zhang, J
  • Zhao, ZW
  • Collaboration, CLAS
  • Status

    Publication Date

  • May 4, 2018
  • Published In

  • Physical Review C  Journal
  • Keywords

  • hep-ex
  • nucl-ex
  • Digital Object Identifier (doi)

    Start Page

  • 055202
  • Volume

  • 97
  • Issue

  • 5