Photon beam asymmetry Σ in the reaction γ→p→pω for Eγ = 1.152 to 1.876 GeV

P. Collins, Barry Ritchie, Michael Dugger, F. J. Klein, A. V. Anisovich, E. Klempt, V. A. Nikonov, A. Sarantsev, K. P. Adhikari, S. Adhikari, D. Adikaram, Z. Akbar, S. Anefalos Pereira, H. Avakian, J. Ball, N. A. Baltzell, M. Bashkanov, M. Battaglieri, V. Batourine, I. Bedlinskiy & 129 others A. S. Biselli, S. Boiarinov, W. J. Briscoe, W. K. Brooks, V. D. Burkert, Frank Thanh Cao, T. Cao, D. S. Carman, A. Celentano, G. Charles, T. Chetry, G. Ciullo, L. Clark, P. L. Cole, M. Contalbrigo, O. Cortes, V. Crede, N. Dashyan, R. De Vita, E. De Sanctis, M. Defurne, A. Deur, C. Djalali, R. Dupre, H. Egiyan, A. El Alaoui, L. El Fassi, P. Eugenio, G. Fedotov, A. Filippi, J. A. Fleming, Y. Ghandilyan, G. P. Gilfoyle, K. L. Giovanetti, F. X. Girod, D. I. Glazier, C. Gleason, E. Golovatch, R. W. Gothe, K. A. Griffioen, M. Guidal, K. Hafidi, H. Hakobyan, C. Hanretty, N. Harrison, M. Hattawy, D. Heddle, K. Hicks, G. Hollis, M. Holtrop, S. M. Hughes, Y. Ilieva, D. G. Ireland, B. S. Ishkhanov, E. L. Isupov, D. Jenkins, H. Jiang, H. S. Jo, S. Joosten, D. Keller, G. Khachatryan, M. Khachatryan, M. Khandaker, A. Kim, W. Kim, A. Klein, V. Kubarovsky, S. V. Kuleshov, L. Lanza, P. Lenisa, K. Livingston, I. J.D. MacGregor, N. Markov, B. McKinnon, C. A. Meyer, Z. E. Meziani, T. Mineeva, V. Mokeev, R. A. Montgomery, A. Movsisyan, E. Munevar, C. Munoz Camacho, P. Nadel-Turonski, L. A. Net, S. Niccolai, G. Niculescu, I. Niculescu, M. Osipenko, A. I. Ostrovidov, M. Paolone, R. Paremuzyan, K. Park, E. Pasyuk, W. Phelps, S. Pisano, O. Pogorelko, J. W. Price, S. Procureur, Y. Prok, D. Protopopescu, B. A. Raue, M. Ripani, A. Rizzo, G. Rosner, F. Sabatié, C. Salgado, R. A. Schumacher, Y. G. Sharabian, A. Simonyan, Iu Skorodumina, G. D. Smith, D. I. Sober, D. Sokhan, N. Sparveris, I. Stankovic, S. Stepanyan, I. I. Strakovsky, S. Strauch, M. Taiuti, M. Ungaro, H. Voskanyan, E. Voutier, N. K. Walford, D. P. Watts, X. Wei, M. H. Wood, N. Zachariou, J. Zhang, Z. W. Zhao

Research output: Contribution to journalArticle

5 Citations (Scopus)

Abstract

Photon beam asymmetry Σ measurements for ω photoproduction in the reaction γ→p→ωp are reported for photon energies from 1.152 to 1.876 GeV. Data were taken using a linearly-polarized tagged photon beam, a cryogenic hydrogen target, and the CLAS spectrometer in Hall B at Jefferson Lab. The measurements obtained markedly increase the size of the database for this observable, extend coverage to higher energies, and resolve discrepancies in previously published data. Comparisons of these new results with predictions from a chiral-quark-based model and from a dynamical coupled-channels model indicate the importance of interferences between t-channel meson exchange and s- and u-channel contributions, underscoring sensitivity to the nucleon resonances included in those descriptions. Comparisons with the Bonn–Gatchina partial-wave analysis indicate the Σ data reported here help to fix the magnitudes of the interference terms between the leading amplitudes in that calculation (Pomeron exchange and the resonant portion of the JP=3/2+ partial wave), as well as the resonant portions of the smaller partial waves with JP=1/2, 3/2, and 5/2+.

Original languageEnglish (US)
Pages (from-to)112-120
Number of pages9
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume773
DOIs
StatePublished - Oct 10 2017

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photon beams
asymmetry
interference
photoproduction
fixing
sands
cryogenics
mesons
quarks
spectrometers
energy
sensitivity
photons
hydrogen
predictions

Keywords

  • Beam asymmetry
  • Omega photoproduction
  • Polarization observable

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

Cite this

Photon beam asymmetry Σ in the reaction γ→p→pω for Eγ = 1.152 to 1.876 GeV. / Collins, P.; Ritchie, Barry; Dugger, Michael; Klein, F. J.; Anisovich, A. V.; Klempt, E.; Nikonov, V. A.; Sarantsev, A.; Adhikari, K. P.; Adhikari, S.; Adikaram, D.; Akbar, Z.; Anefalos Pereira, S.; Avakian, H.; Ball, J.; Baltzell, N. A.; Bashkanov, M.; Battaglieri, M.; Batourine, V.; Bedlinskiy, I.; Biselli, A. S.; Boiarinov, S.; Briscoe, W. J.; Brooks, W. K.; Burkert, V. D.; Cao, Frank Thanh; Cao, T.; Carman, D. S.; Celentano, A.; Charles, G.; Chetry, T.; Ciullo, G.; Clark, L.; Cole, P. L.; Contalbrigo, M.; Cortes, O.; Crede, V.; Dashyan, N.; De Vita, R.; De Sanctis, E.; Defurne, M.; Deur, A.; Djalali, C.; Dupre, R.; Egiyan, H.; El Alaoui, A.; El Fassi, L.; Eugenio, P.; Fedotov, G.; Filippi, A.; Fleming, J. A.; Ghandilyan, Y.; Gilfoyle, G. P.; Giovanetti, K. L.; Girod, F. X.; Glazier, D. I.; Gleason, C.; Golovatch, E.; Gothe, R. W.; Griffioen, K. A.; Guidal, M.; Hafidi, K.; Hakobyan, H.; Hanretty, C.; Harrison, N.; Hattawy, M.; Heddle, D.; Hicks, K.; Hollis, G.; Holtrop, M.; Hughes, S. M.; Ilieva, Y.; Ireland, D. G.; Ishkhanov, B. S.; Isupov, E. L.; Jenkins, D.; Jiang, H.; Jo, H. S.; Joosten, S.; Keller, D.; Khachatryan, G.; Khachatryan, M.; Khandaker, M.; Kim, A.; Kim, W.; Klein, A.; Kubarovsky, V.; Kuleshov, S. V.; Lanza, L.; Lenisa, P.; Livingston, K.; MacGregor, I. J.D.; Markov, N.; McKinnon, B.; Meyer, C. A.; Meziani, Z. E.; Mineeva, T.; Mokeev, V.; Montgomery, R. A.; Movsisyan, A.; Munevar, E.; Munoz Camacho, C.; Nadel-Turonski, P.; Net, L. A.; Niccolai, S.; Niculescu, G.; Niculescu, I.; Osipenko, M.; Ostrovidov, A. I.; Paolone, M.; Paremuzyan, R.; Park, K.; Pasyuk, E.; Phelps, W.; Pisano, S.; Pogorelko, O.; Price, J. W.; Procureur, S.; Prok, Y.; Protopopescu, D.; Raue, B. A.; Ripani, M.; Rizzo, A.; Rosner, G.; Sabatié, F.; Salgado, C.; Schumacher, R. A.; Sharabian, Y. G.; Simonyan, A.; Skorodumina, Iu; Smith, G. D.; Sober, D. I.; Sokhan, D.; Sparveris, N.; Stankovic, I.; Stepanyan, S.; Strakovsky, I. I.; Strauch, S.; Taiuti, M.; Ungaro, M.; Voskanyan, H.; Voutier, E.; Walford, N. K.; Watts, D. P.; Wei, X.; Wood, M. H.; Zachariou, N.; Zhang, J.; Zhao, Z. W.

In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, Vol. 773, 10.10.2017, p. 112-120.

Research output: Contribution to journalArticle

Collins, P, Ritchie, B, Dugger, M, Klein, FJ, Anisovich, AV, Klempt, E, Nikonov, VA, Sarantsev, A, Adhikari, KP, Adhikari, S, Adikaram, D, Akbar, Z, Anefalos Pereira, S, Avakian, H, Ball, J, Baltzell, NA, Bashkanov, M, Battaglieri, M, Batourine, V, Bedlinskiy, I, Biselli, AS, Boiarinov, S, Briscoe, WJ, Brooks, WK, Burkert, VD, Cao, FT, Cao, T, Carman, DS, Celentano, A, Charles, G, Chetry, T, Ciullo, G, Clark, L, Cole, PL, Contalbrigo, M, Cortes, O, Crede, V, Dashyan, N, De Vita, R, De Sanctis, E, Defurne, M, Deur, A, Djalali, C, Dupre, R, Egiyan, H, El Alaoui, A, El Fassi, L, Eugenio, P, Fedotov, G, Filippi, A, Fleming, JA, Ghandilyan, Y, Gilfoyle, GP, Giovanetti, KL, Girod, FX, Glazier, DI, Gleason, C, Golovatch, E, Gothe, RW, Griffioen, KA, Guidal, M, Hafidi, K, Hakobyan, H, Hanretty, C, Harrison, N, Hattawy, M, Heddle, D, Hicks, K, Hollis, G, Holtrop, M, Hughes, SM, Ilieva, Y, Ireland, DG, Ishkhanov, BS, Isupov, EL, Jenkins, D, Jiang, H, Jo, HS, Joosten, S, Keller, D, Khachatryan, G, Khachatryan, M, Khandaker, M, Kim, A, Kim, W, Klein, A, Kubarovsky, V, Kuleshov, SV, Lanza, L, Lenisa, P, Livingston, K, MacGregor, IJD, Markov, N, McKinnon, B, Meyer, CA, Meziani, ZE, Mineeva, T, Mokeev, V, Montgomery, RA, Movsisyan, A, Munevar, E, Munoz Camacho, C, Nadel-Turonski, P, Net, LA, Niccolai, S, Niculescu, G, Niculescu, I, Osipenko, M, Ostrovidov, AI, Paolone, M, Paremuzyan, R, Park, K, Pasyuk, E, Phelps, W, Pisano, S, Pogorelko, O, Price, JW, Procureur, S, Prok, Y, Protopopescu, D, Raue, BA, Ripani, M, Rizzo, A, Rosner, G, Sabatié, F, Salgado, C, Schumacher, RA, Sharabian, YG, Simonyan, A, Skorodumina, I, Smith, GD, Sober, DI, Sokhan, D, Sparveris, N, Stankovic, I, Stepanyan, S, Strakovsky, II, Strauch, S, Taiuti, M, Ungaro, M, Voskanyan, H, Voutier, E, Walford, NK, Watts, DP, Wei, X, Wood, MH, Zachariou, N, Zhang, J & Zhao, ZW 2017, 'Photon beam asymmetry Σ in the reaction γ→p→pω for Eγ = 1.152 to 1.876 GeV', Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, vol. 773, pp. 112-120. https://doi.org/10.1016/j.physletb.2017.08.015
Collins, P. ; Ritchie, Barry ; Dugger, Michael ; Klein, F. J. ; Anisovich, A. V. ; Klempt, E. ; Nikonov, V. A. ; Sarantsev, A. ; Adhikari, K. P. ; Adhikari, S. ; Adikaram, D. ; Akbar, Z. ; Anefalos Pereira, S. ; Avakian, H. ; Ball, J. ; Baltzell, N. A. ; Bashkanov, M. ; Battaglieri, M. ; Batourine, V. ; Bedlinskiy, I. ; Biselli, A. S. ; Boiarinov, S. ; Briscoe, W. J. ; Brooks, W. K. ; Burkert, V. D. ; Cao, Frank Thanh ; Cao, T. ; Carman, D. S. ; Celentano, A. ; Charles, G. ; Chetry, T. ; Ciullo, G. ; Clark, L. ; Cole, P. L. ; Contalbrigo, M. ; Cortes, O. ; Crede, V. ; Dashyan, N. ; De Vita, R. ; De Sanctis, E. ; Defurne, M. ; Deur, A. ; Djalali, C. ; Dupre, R. ; Egiyan, H. ; El Alaoui, A. ; El Fassi, L. ; Eugenio, P. ; Fedotov, G. ; Filippi, A. ; Fleming, J. A. ; Ghandilyan, Y. ; Gilfoyle, G. P. ; Giovanetti, K. L. ; Girod, F. X. ; Glazier, D. I. ; Gleason, C. ; Golovatch, E. ; Gothe, R. W. ; Griffioen, K. A. ; Guidal, M. ; Hafidi, K. ; Hakobyan, H. ; Hanretty, C. ; Harrison, N. ; Hattawy, M. ; Heddle, D. ; Hicks, K. ; Hollis, G. ; Holtrop, M. ; Hughes, S. M. ; Ilieva, Y. ; Ireland, D. G. ; Ishkhanov, B. S. ; Isupov, E. L. ; Jenkins, D. ; Jiang, H. ; Jo, H. S. ; Joosten, S. ; Keller, D. ; Khachatryan, G. ; Khachatryan, M. ; Khandaker, M. ; Kim, A. ; Kim, W. ; Klein, A. ; Kubarovsky, V. ; Kuleshov, S. V. ; Lanza, L. ; Lenisa, P. ; Livingston, K. ; MacGregor, I. J.D. ; Markov, N. ; McKinnon, B. ; Meyer, C. A. ; Meziani, Z. E. ; Mineeva, T. ; Mokeev, V. ; Montgomery, R. A. ; Movsisyan, A. ; Munevar, E. ; Munoz Camacho, C. ; Nadel-Turonski, P. ; Net, L. A. ; Niccolai, S. ; Niculescu, G. ; Niculescu, I. ; Osipenko, M. ; Ostrovidov, A. I. ; Paolone, M. ; Paremuzyan, R. ; Park, K. ; Pasyuk, E. ; Phelps, W. ; Pisano, S. ; Pogorelko, O. ; Price, J. W. ; Procureur, S. ; Prok, Y. ; Protopopescu, D. ; Raue, B. A. ; Ripani, M. ; Rizzo, A. ; Rosner, G. ; Sabatié, F. ; Salgado, C. ; Schumacher, R. A. ; Sharabian, Y. G. ; Simonyan, A. ; Skorodumina, Iu ; Smith, G. D. ; Sober, D. I. ; Sokhan, D. ; Sparveris, N. ; Stankovic, I. ; Stepanyan, S. ; Strakovsky, I. I. ; Strauch, S. ; Taiuti, M. ; Ungaro, M. ; Voskanyan, H. ; Voutier, E. ; Walford, N. K. ; Watts, D. P. ; Wei, X. ; Wood, M. H. ; Zachariou, N. ; Zhang, J. ; Zhao, Z. W. / Photon beam asymmetry Σ in the reaction γ→p→pω for Eγ = 1.152 to 1.876 GeV. In: Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics. 2017 ; Vol. 773. pp. 112-120.
@article{2374975ace90432f95778bc7d3bdc56e,
title = "Photon beam asymmetry Σ in the reaction γ→p→pω for Eγ = 1.152 to 1.876 GeV",
abstract = "Photon beam asymmetry Σ measurements for ω photoproduction in the reaction γ→p→ωp are reported for photon energies from 1.152 to 1.876 GeV. Data were taken using a linearly-polarized tagged photon beam, a cryogenic hydrogen target, and the CLAS spectrometer in Hall B at Jefferson Lab. The measurements obtained markedly increase the size of the database for this observable, extend coverage to higher energies, and resolve discrepancies in previously published data. Comparisons of these new results with predictions from a chiral-quark-based model and from a dynamical coupled-channels model indicate the importance of interferences between t-channel meson exchange and s- and u-channel contributions, underscoring sensitivity to the nucleon resonances included in those descriptions. Comparisons with the Bonn–Gatchina partial-wave analysis indicate the Σ data reported here help to fix the magnitudes of the interference terms between the leading amplitudes in that calculation (Pomeron exchange and the resonant portion of the JP=3/2+ partial wave), as well as the resonant portions of the smaller partial waves with JP=1/2−, 3/2−, and 5/2+.",
keywords = "Beam asymmetry, Omega photoproduction, Polarization observable",
author = "P. Collins and Barry Ritchie and Michael Dugger and Klein, {F. J.} and Anisovich, {A. V.} and E. Klempt and Nikonov, {V. A.} and A. Sarantsev and Adhikari, {K. P.} and S. Adhikari and D. Adikaram and Z. Akbar and {Anefalos Pereira}, S. and H. Avakian and J. Ball and Baltzell, {N. A.} and M. Bashkanov and M. Battaglieri and V. Batourine and I. Bedlinskiy and Biselli, {A. S.} and S. Boiarinov and Briscoe, {W. J.} and Brooks, {W. K.} and Burkert, {V. D.} and Cao, {Frank Thanh} and T. Cao and Carman, {D. S.} and A. Celentano and G. Charles and T. Chetry and G. Ciullo and L. Clark and Cole, {P. L.} and M. Contalbrigo and O. Cortes and V. Crede and N. Dashyan and {De Vita}, R. and {De Sanctis}, E. and M. Defurne and A. Deur and C. Djalali and R. Dupre and H. Egiyan and {El Alaoui}, A. and {El Fassi}, L. and P. Eugenio and G. Fedotov and A. Filippi and Fleming, {J. A.} and Y. Ghandilyan and Gilfoyle, {G. P.} and Giovanetti, {K. L.} and Girod, {F. X.} and Glazier, {D. I.} and C. Gleason and E. Golovatch and Gothe, {R. W.} and Griffioen, {K. A.} and M. Guidal and K. Hafidi and H. Hakobyan and C. Hanretty and N. Harrison and M. Hattawy and D. Heddle and K. Hicks and G. Hollis and M. Holtrop and Hughes, {S. M.} and Y. Ilieva and Ireland, {D. G.} and Ishkhanov, {B. S.} and Isupov, {E. L.} and D. Jenkins and H. Jiang and Jo, {H. S.} and S. Joosten and D. Keller and G. Khachatryan and M. Khachatryan and M. Khandaker and A. Kim and W. Kim and A. Klein and V. Kubarovsky and Kuleshov, {S. V.} and L. Lanza and P. Lenisa and K. Livingston and MacGregor, {I. J.D.} and N. Markov and B. McKinnon and Meyer, {C. A.} and Meziani, {Z. E.} and T. Mineeva and V. Mokeev and Montgomery, {R. A.} and A. Movsisyan and E. Munevar and {Munoz Camacho}, C. and P. Nadel-Turonski and Net, {L. A.} and S. Niccolai and G. Niculescu and I. Niculescu and M. Osipenko and Ostrovidov, {A. I.} and M. Paolone and R. Paremuzyan and K. Park and E. Pasyuk and W. Phelps and S. Pisano and O. Pogorelko and Price, {J. W.} and S. Procureur and Y. Prok and D. Protopopescu and Raue, {B. A.} and M. Ripani and A. Rizzo and G. Rosner and F. Sabati{\'e} and C. Salgado and Schumacher, {R. A.} and Sharabian, {Y. G.} and A. Simonyan and Iu Skorodumina and Smith, {G. D.} and Sober, {D. I.} and D. Sokhan and N. Sparveris and I. Stankovic and S. Stepanyan and Strakovsky, {I. I.} and S. Strauch and M. Taiuti and M. Ungaro and H. Voskanyan and E. Voutier and Walford, {N. K.} and Watts, {D. P.} and X. Wei and Wood, {M. H.} and N. Zachariou and J. Zhang and Zhao, {Z. W.}",
year = "2017",
month = "10",
day = "10",
doi = "10.1016/j.physletb.2017.08.015",
language = "English (US)",
volume = "773",
pages = "112--120",
journal = "Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics",
issn = "0370-2693",
publisher = "Elsevier",

}

TY - JOUR

T1 - Photon beam asymmetry Σ in the reaction γ→p→pω for Eγ = 1.152 to 1.876 GeV

AU - Collins, P.

AU - Ritchie, Barry

AU - Dugger, Michael

AU - Klein, F. J.

AU - Anisovich, A. V.

AU - Klempt, E.

AU - Nikonov, V. A.

AU - Sarantsev, A.

AU - Adhikari, K. P.

AU - Adhikari, S.

AU - Adikaram, D.

AU - Akbar, Z.

AU - Anefalos Pereira, S.

AU - Avakian, H.

AU - Ball, J.

AU - Baltzell, N. A.

AU - Bashkanov, M.

AU - Battaglieri, M.

AU - Batourine, V.

AU - Bedlinskiy, I.

AU - Biselli, A. S.

AU - Boiarinov, S.

AU - Briscoe, W. J.

AU - Brooks, W. K.

AU - Burkert, V. D.

AU - Cao, Frank Thanh

AU - Cao, T.

AU - Carman, D. S.

AU - Celentano, A.

AU - Charles, G.

AU - Chetry, T.

AU - Ciullo, G.

AU - Clark, L.

AU - Cole, P. L.

AU - Contalbrigo, M.

AU - Cortes, O.

AU - Crede, V.

AU - Dashyan, N.

AU - De Vita, R.

AU - De Sanctis, E.

AU - Defurne, M.

AU - Deur, A.

AU - Djalali, C.

AU - Dupre, R.

AU - Egiyan, H.

AU - El Alaoui, A.

AU - El Fassi, L.

AU - Eugenio, P.

AU - Fedotov, G.

AU - Filippi, A.

AU - Fleming, J. A.

AU - Ghandilyan, Y.

AU - Gilfoyle, G. P.

AU - Giovanetti, K. L.

AU - Girod, F. X.

AU - Glazier, D. I.

AU - Gleason, C.

AU - Golovatch, E.

AU - Gothe, R. W.

AU - Griffioen, K. A.

AU - Guidal, M.

AU - Hafidi, K.

AU - Hakobyan, H.

AU - Hanretty, C.

AU - Harrison, N.

AU - Hattawy, M.

AU - Heddle, D.

AU - Hicks, K.

AU - Hollis, G.

AU - Holtrop, M.

AU - Hughes, S. M.

AU - Ilieva, Y.

AU - Ireland, D. G.

AU - Ishkhanov, B. S.

AU - Isupov, E. L.

AU - Jenkins, D.

AU - Jiang, H.

AU - Jo, H. S.

AU - Joosten, S.

AU - Keller, D.

AU - Khachatryan, G.

AU - Khachatryan, M.

AU - Khandaker, M.

AU - Kim, A.

AU - Kim, W.

AU - Klein, A.

AU - Kubarovsky, V.

AU - Kuleshov, S. V.

AU - Lanza, L.

AU - Lenisa, P.

AU - Livingston, K.

AU - MacGregor, I. J.D.

AU - Markov, N.

AU - McKinnon, B.

AU - Meyer, C. A.

AU - Meziani, Z. E.

AU - Mineeva, T.

AU - Mokeev, V.

AU - Montgomery, R. A.

AU - Movsisyan, A.

AU - Munevar, E.

AU - Munoz Camacho, C.

AU - Nadel-Turonski, P.

AU - Net, L. A.

AU - Niccolai, S.

AU - Niculescu, G.

AU - Niculescu, I.

AU - Osipenko, M.

AU - Ostrovidov, A. I.

AU - Paolone, M.

AU - Paremuzyan, R.

AU - Park, K.

AU - Pasyuk, E.

AU - Phelps, W.

AU - Pisano, S.

AU - Pogorelko, O.

AU - Price, J. W.

AU - Procureur, S.

AU - Prok, Y.

AU - Protopopescu, D.

AU - Raue, B. A.

AU - Ripani, M.

AU - Rizzo, A.

AU - Rosner, G.

AU - Sabatié, F.

AU - Salgado, C.

AU - Schumacher, R. A.

AU - Sharabian, Y. G.

AU - Simonyan, A.

AU - Skorodumina, Iu

AU - Smith, G. D.

AU - Sober, D. I.

AU - Sokhan, D.

AU - Sparveris, N.

AU - Stankovic, I.

AU - Stepanyan, S.

AU - Strakovsky, I. I.

AU - Strauch, S.

AU - Taiuti, M.

AU - Ungaro, M.

AU - Voskanyan, H.

AU - Voutier, E.

AU - Walford, N. K.

AU - Watts, D. P.

AU - Wei, X.

AU - Wood, M. H.

AU - Zachariou, N.

AU - Zhang, J.

AU - Zhao, Z. W.

PY - 2017/10/10

Y1 - 2017/10/10

N2 - Photon beam asymmetry Σ measurements for ω photoproduction in the reaction γ→p→ωp are reported for photon energies from 1.152 to 1.876 GeV. Data were taken using a linearly-polarized tagged photon beam, a cryogenic hydrogen target, and the CLAS spectrometer in Hall B at Jefferson Lab. The measurements obtained markedly increase the size of the database for this observable, extend coverage to higher energies, and resolve discrepancies in previously published data. Comparisons of these new results with predictions from a chiral-quark-based model and from a dynamical coupled-channels model indicate the importance of interferences between t-channel meson exchange and s- and u-channel contributions, underscoring sensitivity to the nucleon resonances included in those descriptions. Comparisons with the Bonn–Gatchina partial-wave analysis indicate the Σ data reported here help to fix the magnitudes of the interference terms between the leading amplitudes in that calculation (Pomeron exchange and the resonant portion of the JP=3/2+ partial wave), as well as the resonant portions of the smaller partial waves with JP=1/2−, 3/2−, and 5/2+.

AB - Photon beam asymmetry Σ measurements for ω photoproduction in the reaction γ→p→ωp are reported for photon energies from 1.152 to 1.876 GeV. Data were taken using a linearly-polarized tagged photon beam, a cryogenic hydrogen target, and the CLAS spectrometer in Hall B at Jefferson Lab. The measurements obtained markedly increase the size of the database for this observable, extend coverage to higher energies, and resolve discrepancies in previously published data. Comparisons of these new results with predictions from a chiral-quark-based model and from a dynamical coupled-channels model indicate the importance of interferences between t-channel meson exchange and s- and u-channel contributions, underscoring sensitivity to the nucleon resonances included in those descriptions. Comparisons with the Bonn–Gatchina partial-wave analysis indicate the Σ data reported here help to fix the magnitudes of the interference terms between the leading amplitudes in that calculation (Pomeron exchange and the resonant portion of the JP=3/2+ partial wave), as well as the resonant portions of the smaller partial waves with JP=1/2−, 3/2−, and 5/2+.

KW - Beam asymmetry

KW - Omega photoproduction

KW - Polarization observable

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UR - http://www.scopus.com/inward/citedby.url?scp=85027706851&partnerID=8YFLogxK

U2 - 10.1016/j.physletb.2017.08.015

DO - 10.1016/j.physletb.2017.08.015

M3 - Article

VL - 773

SP - 112

EP - 120

JO - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

JF - Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics

SN - 0370-2693

ER -