Journal article
Authors list: 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.; Bossu, 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.; Dashyan, An N.; Cole, L.; Contalbrigo, M.; Crede, V.; D'Angelox, A.; Dashyan, N.; DeVita, R.; Defurne, M.; Deur, A.; Diehl, S.; Djalali, C.; Dugger, M.; Dupre, R.; Egiyan, H.; Ehrhart, M.; ElAlaoui, A.; ElFassi, 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.; 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.; Joo, K.; Joosten, S.; Keller, D.; Khanal, A.; Khandaker, M.; Kim, A.; Klein, F. J.; 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.; Rizzo, A.; Rosner, G.; Rowley, J.; Sabatie, F.; Salgado, C.; Schmidt, A.; Schumacher, R. A.; 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.; Yale, B.; Zhang, J.; Zhao, Z. W.
Publication year: 2021
Journal: Physics Letters B
Volume number: 817
ISSN: 0370-2693
eISSN: 1873-2445
DOI Link: https://doi.org/10.1016/j.physletb.2021.136304
Publisher: Elsevier
Abstract:
We report measurements of pi(+) and pi(0) 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 G is extracted from Maximum Likelihood fits to the data, enabling the first accurate determination for the reaction (gamma) over right arrow(rho) over right arrow -> pi(+)n, while also significantly extending the kinematic coverage for (gamma) over right arrow(rho) over right arrow -> pi(0)p. This large data set provides an important constraint on the properties and spectrum of excited nucleon states decaying to N pi 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 G within the SAID and Bonn-Gatchina approaches after implementation of our data, illustrates that the partial-wave analyses now significantly extend the knowledge on N pi photoproduction amplitudes at W > 1.8 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. (C) 2021 The Author. Published by Elsevier B.V.
Citation Styles
Harvard Citation style: Zachariou, N., Watts, D., McAndrew, J., Zana, L., Bashkanov, M., Strakovsky, I., et al. (2021) Double polarisation observable G for single pion photoproduction from the proton, Physics Letters B, 817, Article 136304. https://doi.org/10.1016/j.physletb.2021.136304
APA Citation style: Zachariou, N., Watts, D., McAndrew, J., Zana, L., Bashkanov, M., Strakovsky, I., Workman, R., Sarantsev, A., Nikonov, V., Adhikari, K., Adhikari, S., Amaryan, M., Angelini, G., Armstrong, W., Atac, H., Baltzell, N., Barion, L., Battaglieri, M., Bedlinskiy, I., ...Zhao, Z. (2021). Double polarisation observable G for single pion photoproduction from the proton. Physics Letters B. 817, Article 136304. https://doi.org/10.1016/j.physletb.2021.136304
Keywords
GAMMA-P; PARTIAL-WAVE ANALYSIS; RESONANCES
