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Title: Double polarisation observable G for single pion photoproduction from the proton

Abstract

We report measurements of π+ and π0 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 $$\mathbb G$$ is extracted from Maximum Likelihood fits to the data, enabling the first accurate determination for the reaction $$\vec γ\vec ν$$ →π+n, while also significantly extending the kinematic coverage for $$\vec γ\vec ν$$ →π0p. 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 $$\mathbb G$$ within the SAID and Bonn-Gatchina approaches after implementation of our data, illustrates that the partial-wave analyses now significantly extend the knowledge on Nπ photoproduction amplitudes at W >1.8 GeV. Lastly, 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.

Authors:
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Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Mississippi State Univ., Mississippi State, MS (United States); Argonne National Lab. (ANL), Argonne, IL (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF); Italian Istituto Nazionale di Fisica Nucleare; Chilean Comisión Nacional de Investigación Científica y Tecnológica (CONICYT); French Centre National de la Recherche Scientifique; French Commissariat à l’Énergie Atomique; National Research Foundation of Korea (NRF); United Kingdom Science and Technology Facilities Council; Thomas Jefferson National Accelerator Facility; Instituto Nazionale di Fisica Nucleare (INFN); Chilean Comision Nacional de Investigacion Cientifica y Tecnologica (CONICYT)
Contributing Org.:
The CLAS Collaboration
OSTI Identifier:
1874516
Alternate Identifier(s):
OSTI ID: 1780857; OSTI ID: 1781694; OSTI ID: 1840727; OSTI ID: 1882394
Report Number(s):
JLAB-PHY-20-3283; DOE/OR/-23177-5184
Journal ID: ISSN 0370-2693; S0370269321002446; 136304; PII: S0370269321002446
Grant/Contract Number:  
SC0016582; DE–AC05–06OR23177; DE–SC0016583; AC05-06OR23177; FG02-07ER41528; ST/P004385/2; ST/T002077/1; ST/L00478X/2; AC02-06CH11357
Resource Type:
Published Article
Journal Name:
Physics Letters B
Additional Journal Information:
Journal Name: Physics Letters B Journal Volume: 817 Journal Issue: C; Journal ID: ISSN 0370-2693
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English
Subject:
72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS

Citation Formats

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., 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., 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., Sabatié, 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., and Zhao, Z. W. Double polarisation observable G for single pion photoproduction from the proton. Netherlands: N. p., 2021. Web. doi:10.1016/j.physletb.2021.136304.
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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., 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., 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., Sabatié, 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. Double polarisation observable G for single pion photoproduction from the proton. Netherlands. https://doi.org/10.1016/j.physletb.2021.136304
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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., 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., 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., Sabatié, 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., and Zhao, Z. W. Tue . "Double polarisation observable G for single pion photoproduction from the proton". Netherlands. https://doi.org/10.1016/j.physletb.2021.136304.
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@article{osti_1874516,
title = {Double polarisation observable G for single pion photoproduction from the proton},
author = {Zachariou, N. and Watts, D. P. and McAndrew, J. and Zana, L. and Bashkanov, M. and Strakovsky, I. I. and Workman, R. and Sarantsev, A. V. and Nikonov, V. and Adhikari, K. P. and Adhikari, S. and Amaryan, M. J. and Angelini, G. and Armstrong, W. R. and Atac, H. and Baltzell, N. A. and Barion, L. and Battaglieri, M. and Bedlinskiy, I. and Benmokhtar, F. and Bianconi, A. and Biselli, A. S. and Bondi, M. and Bossù, F. and Boiarinov, S. and Briscoe, W. J. and Brooks, W. K. and Bulumulla, D. and Carman, D. S. and Carvajal, J. C. and Celentano, A. and Chatagnon, P. and Chetry, T. and Ciullo, G. and Clary, B. A. and Cole, P. L. and Contalbrigo, M. and Crede, V. and D'Angelo, A. and Dashyan, N. and De Vita, R. and Defurne, M. and Deur, A. and Diehl, S. and Djalali, C. and Dugger, M. and Dupre, R. and Egiyan, H. and Ehrhart, M. and El Alaoui, A. and El Fassi, L. and Elouadrhiri, L. and Eugenio, P. and Fedotov, G. and Fegan, S. and Filippi, A. and Gavalian, G. and Gilfoyle, G. P. and Girod, F. X. and Glazier, D. I. and Gothe, R. W. and Griffioen, K. A. and Guo, L. and Hafidi, K. and Hakobyan, H. and Hattawy, M. and Heddle, D. and Hicks, K. and Hobart, A. and Holtrop, M. and Huang, Q. and Ilieva, Y. and Ireland, D. G. and Isupov, E. L. and Jenkins, D. and Jo, H. S. and Joo, K. and Joosten, S. and Keller, D. and Khanal, A. and Khandaker, M. and Kim, A. and Klein, F. J. and Kripko, A. and Kubarovsky, V. and Lanza, L. and Leali, M. and Lenisa, P. and Livingston, K. and MacGregor, I. J. D. and Marchand, D. and Marsicano, L. and Mascagna, V. and McKinnon, B. and Meziani, Z. E. and Mineeva, T. and Mokeev, V. and Movsisyan, A. and Munevar, E. and Munoz Camacho, C. and Nadel-Turonski, P. and Neupane, K. and Ni, A. and Niccolai, S. and Niculescu, G. and O'Connell, T. R. and Osipenko, M. and Ostrovidov, A. I. and Paolone, M. and Pappalardo, L. L. and Paremuzyan, R. and Pasyuk, E. and Pogorelko, O. and Prok, Y. and Protopopescu, D. and Ripani, M. and Ritchie, B. G. and Ritman, J. and Rizzo, A. and Rosner, G. and Rowley, J. and Sabatié, F. and Salgado, C. and Schmidt, A. and Schumacher, R. A. and Sharabian, Y. G. and Shrestha, U. and Sokhan, D. and Soto, O. and Sparveris, N. and Stepanyan, S. and Strauch, S. and Tyler, N. and Ungaro, M. and Venturelli, L. and Voskanyan, H. and Voutier, E. and Wei, X. and Yale, B. and Zhang, J. and Zhao, Z. W.},
abstractNote = {We report measurements of π+ and π0 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 $\mathbb G$ is extracted from Maximum Likelihood fits to the data, enabling the first accurate determination for the reaction $\vec γ\vec ν$ →π+n, while also significantly extending the kinematic coverage for $\vec γ\vec ν$ →π0p. 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 $\mathbb G$ within the SAID and Bonn-Gatchina approaches after implementation of our data, illustrates that the partial-wave analyses now significantly extend the knowledge on Nπ photoproduction amplitudes at W >1.8 GeV. Lastly, 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.},
doi = {10.1016/j.physletb.2021.136304},
journal = {Physics Letters B},
number = C,
volume = 817,
place = {Netherlands},
year = {Tue Jun 01 00:00:00 EDT 2021},
month = {Tue Jun 01 00:00:00 EDT 2021}
}
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