Double polarisation observable G for single pion photoproduction from the proton

Zachariou, N.; Pappalardo, L. L.; Tichelbäcker, Laura; Munevar, E.; Nikonov, V.; Fedotov, G.; Venturelli, L.; Khanal, A.; Ostrovidov, A. I.; Niculescu, G.; Nadel-Turonski, P.; Wei, X.; Schmidt, A.; Sharabian, Y. G.; Joo, K.; Heddle, D.; Bondi, M.; Stepanyan, S.; Paremuzyan, R.; Briscoe, W. J.; Hakobyan, H.; Deur, A.; Lanza, L.; Zana, L.; Battaglieri, M.; Bossù, F.; Gilfoyle, G. P.; Biselli, A. S.; Joosten, S.; Amaryan, M. J.; McAndrew, J.; Ni, A.; Voskanyan, H.; Hattawy, M.; Bedlinskiy, I.; Ciullo, G.; Marchand, D.; Kubarovsky, V.; Angelini, G.; Carman, D. S.; Eugenio, P.; Soto, O.; Munoz Camacho, C.; Guo, L.; Ungaro, M.; Watts, D. P.; Strakovsky, I. I.; Jo, H. S.; Pasyuk, E.; Benmokhtar, F.; Workman, R.; Ilieva, Y.; Sokhan, D.; Gavalian, G.; Sparveris, N.; Egiyan, H.; Atac, H.; Djalali, C.; Holtrop, M.; Kim, Taegeon; Yale, B.; Mokeev, V.; Chetry, T.; Chatagnon, P.; Girod, F. X.; Paolone, M.; Hicks, K.; O'Connell, T. R.; Meziani, Z. E.; Keller, D.; Contalbrigo, M.; Ehrhart, M.; Fegan, S.; Rosner, G.; Hobart, A.; Diehl, S.; Sabatié, F.; McKinnon, B.; Tyler, N.; De Vita, R.; Livingston, K.; Kripko, A.; Clary, B. A.; Rizzo, A.; Neupane, K.; Dashyan, N.; Hafidi, K.; Boiarinov, S.; Dugger, M.; Jenkins, D.; Ritman, J.; Carvajal, J. C.; Klein, Felix; Baltzell, N. A.; Bashkanov, M.; Zhang, Jiayuan; Zhao, Z. W.; El Fassi, L.; Armstrong, W. R.; Crede, V.; Movsisyan, A.; Glazier, D. I.; Adhikari, S.; MacGregor, I. J. D.; Marsicano, L.; Rowley, J.; Elouadrhiri, L.; Prok, Y.; Shrestha, U.; Isupov, E. L.; Griffioen, K. A.; Bianconi, A.; Cole, P. L.; Salgado, C.; Protopopescu, D.; Strauch, S.; Huang, Q.; Sarantsev, A. V.; Bulumulla, D.; Mineeva, T.; Khandaker, M.; d'Angelo, Antonio; Pogorelko, O.; Barion, L.; 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.; Voutier, E.; Lenisa, Paolo; Ireland, D. G.; Adhikari, K. P.; Ripani, M.; Ritchie, B. G.

doi:10.1016/j.physletb.2021.136304

Journal Article

FZJ-2021-02102

Double polarisation observable G for single pion photoproduction from the proton

Zachariou, N. ; Watts, D. P. ; McAndrew, J. ; Zana, L. ; Bashkanov, M. ; Strakovsky, I. I. ; Workman, R. ; Sarantsev, A. V. ; Nikonov, V. ; Adhikari, K. P. ; Adhikari, S. ; Amaryan, M. J. ; Angelini, G. ; Armstrong, W. R. ; Atac, H. ; Baltzell, N. A. ; Barion, L. ; Battaglieri, M. ; Bedlinskiy, I. ; Benmokhtar, F. ; Bianconi, A. ; Biselli, A. S. ; Bondi, M. ; Bossù, F. ; Boiarinov, S. ; Briscoe, W. J. ; Brooks, W. K. ; Bulumulla, D. ; Carman, D. S. ; Carvajal, J. C. ; Celentano, A. ; Chatagnon, P. ; Chetry, T. ; Ciullo, G. ; Clary, B. A. ; Cole, P. L. ; Contalbrigo, M. ; Crede, V. ; 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. ; Elouadrhiri, L. ; Eugenio, P. ; Fedotov, G. ; Fegan, S. ; Filippi, A. ; Gavalian, G. ; Gilfoyle, G. P. ; Girod, F. X. ; Glazier, D. I. ; Gothe, R. W. ; Griffioen, K. A. ; Guo, L.FZJ* ; Hafidi, K. ; Hakobyan, H. ; Hattawy, M. ; Heddle, D. ; Hicks, K. ; Hobart, A. ; Holtrop, M. ; Huang, Q. ; Ilieva, Y. ; Ireland, D. G. ; Isupov, E. L. ; Jenkins, D. ; Jo, H. S.FZJ* ; Joo, K. ; Joosten, S. ; Keller, D. ; Khanal, A. ; Khandaker, M. ; Kim, T.FZJ* ; Klein, F.FZJ* ; Kripko, A. ; Kubarovsky, V. ; Lanza, L. ; Leali, M. ; Lenisa, P. ; Livingston, K. ; MacGregor, I. J. D. ; Marchand, D. ; Marsicano, L. ; Mascagna, V. ; McKinnon, B. ; Meziani, Z. E. ; Mineeva, T. ; Mokeev, V. ; Movsisyan, A. ; Munevar, E. ; Munoz Camacho, C. ; Nadel-Turonski, P. ; Neupane, K. ; Ni, A. ; Niccolai, S. ; Niculescu, G. ; O'Connell, T. R. ; Osipenko, M. ; Ostrovidov, A. I. ; Paolone, M. ; Pappalardo, L. L. ; Paremuzyan, R. ; Pasyuk, E. ; Pogorelko, O. ; Prok, Y. ; Protopopescu, D. ; Ripani, M. ; Ritchie, B. G. ; Ritman, J. (Corresponding author)FZJ* ; Rizzo, A. ; Rosner, G. ; Rowley, J. ; Sabatié, F. ; Salgado, C. ; Schmidt, A. ; Tichelbäcker, L.FZJ* ; Sharabian, Y. G. ; Shrestha, U. ; Sokhan, D. ; Soto, O. ; Sparveris, N. ; Stepanyan, S. ; Strauch, S. ; Tyler, N. ; Ungaro, M. ; Venturelli, L. ; Voskanyan, H. ; Voutier, E. ; Wei, X.FZJ* ; Yale, B. ; Zhang, J.FZJ* ; Zhao, Z. W.

2021
North-Holland Publ. Amsterdam

Physics letters / B 817, 136304 - (2021) [10.1016/j.physletb.2021.136304]

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Please use a persistent id in citations: http://hdl.handle.net/2128/27766 doi:10.1016/j.physletb.2021.136304

Abstract: We report measurements of and meson photoproduction from longitudinally spin-polarised protons by an energy tagged (0.73-2.3 GeV) and linearly polarised photon beam. A close to complete solid angle coverage for the reaction products was provided by the CEBAF Large Acceptance Spectrometer at Jefferson Laboratory. The double-polarisation observable is extracted from Maximum Likelihood fits to the data, enabling the first accurate determination for the reaction , while also significantly extending the kinematic coverage for . This large data set provides an important constraint on the properties and spectrum of excited nucleon states decaying to Nπ in the mass range from 1.4 to 2.2 GeV, as well as for background (non-resonant) photoproduction processes. The considerable improvement achieved in the description of the observable within the SAID and Bonn-Gatchina approaches after implementation of our data, illustrates that the partial-wave analyses now significantly extend the knowledge on Nπ photoproduction amplitudes at GeV. A partial-wave analysis using the new high-precision data set has a large impact on the extracted properties of high-spin nucleon excited states.

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ddc:530

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Experimentelle Hadronstruktur (IKP-1)

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Record created 2021-05-10, last modified 2021-07-06

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