Measurements of the linearly-polarized photon beam asymmetry Sigma for photoproduction from the proton of eta and eta ' mesons are reported. A linearly-polarized tagged photon beam produced by coherent bremsstrahlung was incident on a cryogenic hydrogen target within the CEBAF Large Acceptance Spectrometer. Results are presented for the gamma p -> eta p reaction for incident photon energies from 1.070 to 1.876 GeV, and from 1.516 to 1.836 GeV for the gamma p -> eta ' p reaction. For gamma p -> eta p, the data reported here considerably extend the range of measurements to higher energies, and are consistent with the few previously published measurements for this observable near threshold. For gamma p -> eta ' p, the results obtained are consistent with the few previously published measurements for this observable near threshold, but also greatly expand the incident photon energy coverage for that reaction. Initial analysis of the data reported here with the Bonn-Gatchina model strengthens the evidence for four nucleon resonances - the N(1895)1/2(-), N(1900)3/2(+), N(2100)1/2(+) and N(2120)3/2(-) resonances which presently lack the "four-star" status in the current Particle Data Group compilation, providing examples of how these new measurements help refine models of the photoproduction process. (C) 2017 The Authors. Published by Elsevier B.V.

Collins, P., Ritchie, B.g., Dugger, M., Anisovich, A.v., Doring, M., Klempt, E., et al. (2017). Photon beam asymmetry Σ for η and η′ photoproduction from the proton. PHYSICS LETTERS. SECTION B, 771, 213-221 [10.1016/j.physletb.2017.05.045].

Photon beam asymmetry Σ for η and η′ photoproduction from the proton

Colaneri L.
Membro del Collaboration Group
;
D'Angelo A.
Membro del Collaboration Group
;
Lanza L.;Pisano S.
Membro del Collaboration Group
;
Rizzo A.
Membro del Collaboration Group
;
2017-05-18

Abstract

Measurements of the linearly-polarized photon beam asymmetry Sigma for photoproduction from the proton of eta and eta ' mesons are reported. A linearly-polarized tagged photon beam produced by coherent bremsstrahlung was incident on a cryogenic hydrogen target within the CEBAF Large Acceptance Spectrometer. Results are presented for the gamma p -> eta p reaction for incident photon energies from 1.070 to 1.876 GeV, and from 1.516 to 1.836 GeV for the gamma p -> eta ' p reaction. For gamma p -> eta p, the data reported here considerably extend the range of measurements to higher energies, and are consistent with the few previously published measurements for this observable near threshold. For gamma p -> eta ' p, the results obtained are consistent with the few previously published measurements for this observable near threshold, but also greatly expand the incident photon energy coverage for that reaction. Initial analysis of the data reported here with the Bonn-Gatchina model strengthens the evidence for four nucleon resonances - the N(1895)1/2(-), N(1900)3/2(+), N(2100)1/2(+) and N(2120)3/2(-) resonances which presently lack the "four-star" status in the current Particle Data Group compilation, providing examples of how these new measurements help refine models of the photoproduction process. (C) 2017 The Authors. Published by Elsevier B.V.
18-mag-2017
Pubblicato
Rilevanza internazionale
Articolo
Esperti anonimi
Settore FIS/04 - FISICA NUCLEARE E SUBNUCLEARE
English
Con Impact Factor ISI
Meson photoproduction; Eta photoproduction; Eta-prime photoproduction; Polarization observable; Photon beam asymmetry
CLAS Collaboration
https://ac.els-cdn.com/S0370269317304082/1-s2.0-S0370269317304082-main.pdf?_tid=spdf-9ec2c2a4-98b2-42f8-835c-b6b1661f1d1b&acdnat=1519809625_db3df7ff54811dd0fd68118742600340
Collins, P., Ritchie, B.g., Dugger, M., Anisovich, A.v., Doring, M., Klempt, E., et al. (2017). Photon beam asymmetry Σ for η and η′ photoproduction from the proton. PHYSICS LETTERS. SECTION B, 771, 213-221 [10.1016/j.physletb.2017.05.045].
Collins, P; Ritchie, Bg; Dugger, M; Anisovich, Av; Doring, M; Klempt, E; Nikonov, Va; Ronchen, D; Sadasivan, D; Sarantsev, A; Adhikari, Kp; Akbar, Z; Amaryan, Mj; Anefalos Pereira, S; Avakian, H; Ball, J; Balossino, I; Bashkanov, M; Battaglieri, M; Bedlinskiy, I; Biselli, As; Briscoe, Wj; Brooks, Wk; Burkert, Vd; Cao, Ft; Carman, Ds; Celentano, A; Chandavar, S; Charles, G; Chetry, T; Ciullo, G; Clark, L; Colaneri, L; Cole, Pl; Compton, N; Contalbrigo, M; Cortes, O; Crede, V; D'Angelo, A; Dashyan, N; De Vita, R; De Sanctis, E; Deur, A; Djalali, C; Dupre, R; Egiyan, H; El Alaoui, A; El Fassi, L; Elouadrhiri, L; Eugenio, P; Fanchini, E; Fedotov, G; Filippi, A; Fleming, Ja; Ghandilyan, Y; Gilfoyle, Gp; Giovanetti, Kl; Girod, Fx; Glazier, Di; Gleason, C; Golovatch, E; Gothe, Rw; Griffioen, Ka; Guo, L; Hafidi, K; Hakobyan, H; Hanretty, C; Harrison, N; Heddle, D; Hicks, K; Holtrop, M; Hughes, Sm; Ilieva, Y; Ireland, Dg; Ishkhanov, Bs; Isupov, El; Jenkins, D; Jo, Hs; Joosten, S; Keller, D; Khachatryan, G; Khachatryan, M; Khandaker, M; Kim, A; Kim, W; Klein, A; Klein, Fj; Kubarovsky, V; Lanza, L; Lenisa, P; Livingston, K; Macgregor, Ijd; Markov, N; Mckinnon, B; Meyer, Ca; Mirazita, M; Mokeev, V; Montgomery, Ra; Movsisyan, A; Munoz Camacho, C; Murdoch, G; Nadel-Turonski, P; 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; Prok, Y; Protopopescu, D; Raue, Ba; Ripani, M; Rizzo, A; Rosner, G; Roy, P; Sabatie, F; Salgado, C; Schumacher, Ra; Sharabian, Yg; Skorodumina, I; Smith, Gd; Sokhan, D; Sparveris, N; Stepanyan, S; Strakovsky, Ii; Strauch, S; Taiuti, M; Tian, Y; Torayev, B; Ungaro, M; Voskanyan, H; Voutier, E; Walford, Nk; Wei, X; Zachariou, N; Zhang, J
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Utilizza questo identificativo per citare o creare un link a questo documento: https://hdl.handle.net/2108/194449
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