Photoproduction of η mesons off the proton for 1.2 &lt; E γ &lt; 4.7 GeV using CLAS at Jefferson Laboratory

Hu, T.; Wood, M. H.; Pappalardo, L. L.; Tichelbäcker, Laura; Munevar, E.; Fedotov, G.; Venturelli, L.; Khachatryan, M.; Ostrovidov, A. I.; Niculescu, G.; Stoler, P.; Nadel-Turonski, P.; Schmidt, Anne; Wei, X.; Sharabian, Y. G.; Joo, K.; Heddle, D.; Stepanyan, S.; Paremuzyan, R.; Hayward, T. B.; Briscoe, W. J.; Hakobyan, H.; Deur, A.; Tan, J. A.; Lanza, L.; Akbar, Z.; Battaglieri, M.; Bossù, F.; Gilfoyle, G. P.; Biselli, A. S.; Joosten, S.; Price, J. W.; Wei, Daikang; Amaryan, M. J.; Munoz Camacho, C.; Voskanyan, H.; Hattawy, M.; Bedlinskiy, I.; Ciullo, G.; Marchand, D.; Kubarovsky, V.; Angelini, G.; Carman, D. S.; Eugenio, P.; Soto, O.; Guo, L.; Ungaro, M.; Watts, D. P.; Strakovsky, I. I.; Jo, H. S.; Pasyuk, E.; Benmokhtar, F.; Ilieva, Y.; Sokhan, D.; Asryan, G.; Gavalian, G.; Sparveris, N.; Boiarinov, S.; Atac, H.; Djalali, C.; Khanal, A.; O'Connell, T.; Holtrop, M.; Kim, Taegeon; Dugger, M.; Phelps, W.; Carvajal, J.; Poudel, J.; Mokeev, V.; Chetry, T.; Zachariou, N.; Chatagnon, P.; Girod, F. X.; Fersch, R.; Paolone, M.; Hicks, K.; Meziani, Z. E.; Harrison, N.; Markov, Aleksandr; Keller, D.; Contalbrigo, M.; Ehrhart, M.; Golovatch, E.; Rosner, G.; Hobart, A.; Diehl, S.; Sabatié, F.; McKinnon, B.; Tyler, N.; De Vita, R.; Livingston, K.; Clary, B. A.; Rizzo, A.; Dashyan, N.; Hafidi, K.; Egiyan, H.; Kim, W.; Jenkins, D.; Ritman, J.; Raue, B. A.; Illari, I.; Klein, Felix; Zhang, Jiayuan; Zhao, Z. W.; El Fassi, L.; Crede, V.; Movsisyan, A.; Cruz-Torres, R.; Glazier, D. I.; Adhikari, S.; McCracken, M. E.; MacGregor, I. J. D.; Rowley, J.; Clark, L.; Prok, Y.; Ishkhanov, B. S.; Meyer, Carolin; Shrestha, U.; Kim, C. W.; Isupov, E. L.; Griffioen, K. A.; Ayerbe Gayoso, C.; Bianconi, A.; Cole, P. L.; Salgado, C.; Protopopescu, D.; Strauch, S.; D'Angelo, A.; Voutier, E.; Mineeva, T.; Khandaker, M.; Lenisa, P.; Pogorelko, O.; Barion, L.; Hanretty, C.; Brooks, W. K.; Filippi, A.; Mascagna, V.; Dupre, R.; Niccolai, S.; Celentano, A.; Leali, M.; Defurne, M.; Gothe, R. W.; El Alaoui, A.; Osipenko, M.; Skorodumina, Iu.; Ireland, D. G.; Adhikari, K. P.; Ripani, M.; Guidal, M.

doi:10.1103/PhysRevC.102.065203

Journal Article

FZJ-2021-02108

Photoproduction of η mesons off the proton for 1.2 < E γ < 4.7 GeV using CLAS at Jefferson Laboratory

Hu, T. ; Akbar, Z. ; Crede, V. ; Adhikari, K. P. ; Adhikari, S. ; Amaryan, M. J. ; Angelini, G. ; Asryan, G. ; Atac, H. ; Ayerbe Gayoso, C. ; Barion, L. ; Battaglieri, M. ; Bedlinskiy, I. ; Benmokhtar, F. ; Bianconi, A. ; Biselli, A. S. ; Bossù, F. ; Boiarinov, S. ; Briscoe, W. J. ; Brooks, W. K. ; Carman, D. S. ; Carvajal, J. ; Celentano, A. ; Chatagnon, P. ; Chetry, T. ; Ciullo, G. ; Clark, L. ; Clary, B. A. ; Cole, P. L. ; Contalbrigo, M. ; Cruz-Torres, R. ; D'Angelo, A.FZJ* ; Dashyan, N. ; De Vita, R. ; Defurne, M. ; Deur, A. ; Diehl, S. ; Djalali, C. ; Dugger, M. ; Dupre, R. ; Egiyan, H. ; Ehrhart, M. ; El Alaoui, A. ; El Fassi, L. ; Eugenio, P. ; Fedotov, G. ; Fersch, R. ; Filippi, A. ; Gavalian, G. ; Gilfoyle, G. P. ; Girod, F. X. ; Glazier, D. I. ; Golovatch, E. ; Gothe, R. W. ; Griffioen, K. A. ; Guidal, M. ; Guo, L. ; Hafidi, K. ; Hakobyan, H. ; Hanretty, C. ; Harrison, N. ; Hattawy, M. ; Hayward, T. B. ; Heddle, D. ; Hicks, K. ; Hobart, A. ; Holtrop, M. ; Ilieva, Y. ; Illari, I. ; Ireland, D. G. ; Ishkhanov, B. S. ; Isupov, E. L. ; Jenkins, D. ; Jo, H. S. ; Joo, K. ; Joosten, S. ; Keller, D. ; Khachatryan, M. ; Khanal, A. ; Khandaker, M. ; Kim, T. ; Kim, C. W. ; Kim, W. ; Klein, F. ; Kubarovsky, V. ; Lanza, L. ; Leali, M. ; Lenisa, P. ; Livingston, K. ; MacGregor, I. J. D. ; Marchand, D. ; Markov, A. ; Mascagna, V. ; McCracken, M. E. ; McKinnon, B. ; Meyer, C. ; Meziani, Z. E. ; Mineeva, T. ; Mokeev, V. ; Movsisyan, A. ; Munevar, E. ; Munoz Camacho, C. ; Nadel-Turonski, P. ; Niccolai, S. ; Niculescu, G. ; O'Connell, T. ; Osipenko, M. ; Ostrovidov, A. I. ; Paolone, M. ; Pappalardo, L. L. ; Paremuzyan, R. ; Pasyuk, E. ; Phelps, W. ; Pogorelko, O. ; Poudel, J. ; Price, J. W. ; Prok, Y. ; Protopopescu, D. ; Raue, B. A. ; Ripani, M. ; Ritman, J. (Corresponding author)FZJ* ; Rizzo, A. ; Rosner, G. ; Rowley, J. ; Sabatié, F. ; Salgado, C. ; Schmidt, A. ; Tichelbäcker, L. ; Sharabian, Y. G. ; Shrestha, U. ; Skorodumina, I. ; Sokhan, D. ; Soto, O. ; Sparveris, N. ; Stepanyan, S. ; Stoler, P. ; Strakovsky, I. I. ; Strauch, S. ; Tan, J. A. ; Tyler, N. ; Ungaro, M. ; Venturelli, L. ; Voskanyan, H. ; Voutier, E. ; Watts, D. P. ; Wei, D. ; Wei, X.FZJ* ; Wood, M. H. ; Zachariou, N. ; Zhang, J. ; Zhao, Z. W.

2020
Inst. Woodbury, NY

Physical review / C 102(6), 065203 (2020) [10.1103/PhysRevC.102.065203]

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Please use a persistent id in citations: http://hdl.handle.net/2128/27773 doi:10.1103/PhysRevC.102.065203

Abstract: Photoproduction cross sections are reported for the reaction γp→pη using energy-tagged photons and the CLAS spectrometer at Jefferson Laboratory. The η mesons are detected in their dominant charged decay mode, η→π+π−π0, and results on differential cross sections are presented for incident photon energies between 1.2 and 4.7 GeV. These new η photoproduction data are consistent with earlier CLAS results but extend the energy range beyond the nucleon resonance region into the Regge regime. The normalized angular distributions are also compared with the experimental results from several other experiments, and with predictions of η MAID\,2018 and the latest solution of the Bonn-Gatchina coupled-channel analysis. Differential cross sections dσ/dt are presented for incident photon energies Eγ>2.9 GeV (W>2.5 GeV), and compared with predictions which are based on Regge trajectories exchange in the t-channel (Regge models). The data confirm the expected dominance of ρ, ω vector-meson exchange in an analysis by the Joint Physics Analysis Center.

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Experimentelle Hadronstruktur (IKP-1)

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