Measurement of the helicity asymmetry $$$${\mathbb {E}}$$$$ for the $$$$\vec {\gamma }\vec {p} \rightarrow p \pi ^0$$$$ reaction in the resonance region: The CLAS Collaboration
Abstract
Abstract The double-spin-polarization observable $$$${\mathbb {E}}$$$$ for $$$$\vec {\gamma }\vec {p}\rightarrow p\pi ^0$$$$ has been measured with the CEBAF Large Acceptance Spectrometer (CLAS) at photon beam energies $$$$E_\gamma $$$$ from 0.367 to $$$$2.173~\textrm{GeV}$$$$ (corresponding to center-of-mass energies from 1.240 to $$$$2.200~\textrm{GeV}$$$$ ) for pion center-of-mass angles, $$$$\cos \theta _{\pi ^0}^{c.m.}$$$$ , between $$-$$ 0.86 and 0.82. These new CLAS measurements cover a broader energy range and have smaller uncertainties compared to previous CBELSA data and provide an important independent check on systematics. These measurements are compared to predictions as well as new global fits from The George Washington University, Mainz, and Bonn-Gatchina groups. Their inclusion in multipole analyses will allow us to refine our understanding of the single-pion production contribution to the Gerasimov-Drell-Hearn sum rule and improve the determination of resonance properties, which will be presented in a future publication.
- Authors:
-
;
more »
- Publication Date:
- Research Org.:
- Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States)
- Sponsoring Org.:
- USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF)
- Contributing Org.:
- The CLAS Collaboration
- OSTI Identifier:
- 2006520
- Alternate Identifier(s):
- OSTI ID: 2202972
- Report Number(s):
- JLAB-PHY-23-3819; arXiv:2305.08616; DOE/OR/23177-6194
Journal ID: ISSN 1434-601X; 217; PII: 1123
- Grant/Contract Number:
- 627 SC0016582; SC0016583; AC05–06OR23177; SC0016582
- Resource Type:
- Published Article
- Journal Name:
- European Physical Journal. A, Hadrons and Nuclei (Online)
- Additional Journal Information:
- Journal Name: European Physical Journal. A, Hadrons and Nuclei (Online) Journal Volume: 59 Journal Issue: 9; Journal ID: ISSN 1434-601X
- Publisher:
- Springer Science + Business Media
- Country of Publication:
- Germany
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Kim, C. W., Zachariou, N., Bashkanov, M., Briscoe, W. J., Fegan, S., Kashevarov, V. L., Nikonov, K., Sarantsev, A., Schmidt, A., Strakovsky, I. I., Watts, D. P., Workman, R. L., Achenbach, P., Akbar, Z., Amaryan, M. J., Angelini, G., Armstrong, W. R., Atac, H., Baashen, L., Baltzell, N. A., Barion, L., Battaglieri, M., Bedlinskiy, I., Benkel, B., Benmokhtar, F., Benmouna, N., Bianconi, A., Biselli, A. S., Booth, W. A., Bossù, F., Boiarinov, S., Brinkmann, K. T., Brock, J., Bulumulla, D., Burkert, V. D., Cao, T., Carlin, C., Carman, D. S., Carvajal, J. C., Chatagnon, P., Chesnokov, V., Chetry, T., Ciullo, G., Clash, G., Cole, P. L., Contalbrigo, M., Becerra, O. Cortes, Costantini, G., Crede, V., D’Angelo, A., Dashyan, N., De Vita, R., Defurne, M., Deur, A., Diehl, S., Djalali, C., Dugger, M., Dupre, R., Egiyan, H., Alaoui, A. El, Fassi, L. El, Elouadrhiri, L., Eugenio, P., Filippi, A., Fogler, C., Gavalian, G., Gilfoyle, G. P., Golubenko, A. A., Gosta, G., Gothe, R. W., Griffioen, K. A., Hafidi, K., Hakobyan, H., Hattawy, M., Hauenstein, F., Hayward, T. B., Heddle, D., Hobart, A., Holtrop, M., Ilieva, Y., Illari, I., Ireland, D. G., Isupov, E. L., Iwamoto, H., Jenkins, D., Jo, H. S., Johnston, R., Joo, K., Joosten, S., Kageya, T., Keith, C. D., Keller, D., Khanal, A., Kim, A., Kim, W., Klein, F. J., Klimenko, V., Kripko, A., Kubarovsky, V., Lanza, L., Leali, M., Lee, S., Li, X., Livingston, K., MacGregor, I. J. D., Marchand, D., Mascagna, V., McKinnon, B., Migliorati, S., Milner, R. G., Mineeva, T., Mokeev, V., Camacho, C. Munoz, Nadel-Turonski, P., Neupane, K., Niccolai, S., Osipenko, M., Ostrovidov, A. I., Pandey, P., Paolone, M., Pappalardo, L. L., Paremuzyan, R., Pasyuk, E., Paul, S. J., Pilleux, N., Pokhrel, M., Poudel, J., Price, J. W., Prok, Y., Radic, A., Ramasubramanian, N., Ratliff, S., Reed, T., Richards, J., Ripani, M., Ritchie, B. G., Ritman, J., Rosner, G., Salgado, C., Schadmand, S., Schott, D., Schumacher, R. A., Scott, M. B. C., Seely, M. L., Seroka, E. M., Shirokov, E. V., Shrestha, U., Sokhan, D., Sparveris, N., Spreafico, M., Strauch, S., Tan, J., Tyson, R., Ungaro, M., Vallarino, S., Venturelli, L., Voskanyan, H., Voutier, E., Wei, X., Williams, R., Wishart, R., Wood, M. H., Yurov, M., Zhang, J., and Zurek, M. Measurement of the helicity asymmetry $${\mathbb {E}}$$ for the $$\vec {\gamma }\vec {p} \rightarrow p \pi ^0$$ reaction in the resonance region: The CLAS Collaboration. Germany: N. p., 2023.
Web. doi:10.1140/epja/s10050-023-01123-3.
Kim, C. W., Zachariou, N., Bashkanov, M., Briscoe, W. J., Fegan, S., Kashevarov, V. L., Nikonov, K., Sarantsev, A., Schmidt, A., Strakovsky, I. I., Watts, D. P., Workman, R. L., Achenbach, P., Akbar, Z., Amaryan, M. J., Angelini, G., Armstrong, W. R., Atac, H., Baashen, L., Baltzell, N. A., Barion, L., Battaglieri, M., Bedlinskiy, I., Benkel, B., Benmokhtar, F., Benmouna, N., Bianconi, A., Biselli, A. S., Booth, W. A., Bossù, F., Boiarinov, S., Brinkmann, K. T., Brock, J., Bulumulla, D., Burkert, V. D., Cao, T., Carlin, C., Carman, D. S., Carvajal, J. C., Chatagnon, P., Chesnokov, V., Chetry, T., Ciullo, G., Clash, G., Cole, P. L., Contalbrigo, M., Becerra, O. Cortes, Costantini, G., Crede, V., D’Angelo, A., Dashyan, N., De Vita, R., Defurne, M., Deur, A., Diehl, S., Djalali, C., Dugger, M., Dupre, R., Egiyan, H., Alaoui, A. El, Fassi, L. El, Elouadrhiri, L., Eugenio, P., Filippi, A., Fogler, C., Gavalian, G., Gilfoyle, G. P., Golubenko, A. A., Gosta, G., Gothe, R. W., Griffioen, K. A., Hafidi, K., Hakobyan, H., Hattawy, M., Hauenstein, F., Hayward, T. B., Heddle, D., Hobart, A., Holtrop, M., Ilieva, Y., Illari, I., Ireland, D. G., Isupov, E. L., Iwamoto, H., Jenkins, D., Jo, H. S., Johnston, R., Joo, K., Joosten, S., Kageya, T., Keith, C. D., Keller, D., Khanal, A., Kim, A., Kim, W., Klein, F. J., Klimenko, V., Kripko, A., Kubarovsky, V., Lanza, L., Leali, M., Lee, S., Li, X., Livingston, K., MacGregor, I. J. D., Marchand, D., Mascagna, V., McKinnon, B., Migliorati, S., Milner, R. G., Mineeva, T., Mokeev, V., Camacho, C. Munoz, Nadel-Turonski, P., Neupane, K., Niccolai, S., Osipenko, M., Ostrovidov, A. I., Pandey, P., Paolone, M., Pappalardo, L. L., Paremuzyan, R., Pasyuk, E., Paul, S. J., Pilleux, N., Pokhrel, M., Poudel, J., Price, J. W., Prok, Y., Radic, A., Ramasubramanian, N., Ratliff, S., Reed, T., Richards, J., Ripani, M., Ritchie, B. G., Ritman, J., Rosner, G., Salgado, C., Schadmand, S., Schott, D., Schumacher, R. A., Scott, M. B. C., Seely, M. L., Seroka, E. M., Shirokov, E. V., Shrestha, U., Sokhan, D., Sparveris, N., Spreafico, M., Strauch, S., Tan, J., Tyson, R., Ungaro, M., Vallarino, S., Venturelli, L., Voskanyan, H., Voutier, E., Wei, X., Williams, R., Wishart, R., Wood, M. H., Yurov, M., Zhang, J., & Zurek, M. Measurement of the helicity asymmetry $${\mathbb {E}}$$ for the $$\vec {\gamma }\vec {p} \rightarrow p \pi ^0$$ reaction in the resonance region: The CLAS Collaboration. Germany. https://doi.org/10.1140/epja/s10050-023-01123-3
Kim, C. W., Zachariou, N., Bashkanov, M., Briscoe, W. J., Fegan, S., Kashevarov, V. L., Nikonov, K., Sarantsev, A., Schmidt, A., Strakovsky, I. I., Watts, D. P., Workman, R. L., Achenbach, P., Akbar, Z., Amaryan, M. J., Angelini, G., Armstrong, W. R., Atac, H., Baashen, L., Baltzell, N. A., Barion, L., Battaglieri, M., Bedlinskiy, I., Benkel, B., Benmokhtar, F., Benmouna, N., Bianconi, A., Biselli, A. S., Booth, W. A., Bossù, F., Boiarinov, S., Brinkmann, K. T., Brock, J., Bulumulla, D., Burkert, V. D., Cao, T., Carlin, C., Carman, D. S., Carvajal, J. C., Chatagnon, P., Chesnokov, V., Chetry, T., Ciullo, G., Clash, G., Cole, P. L., Contalbrigo, M., Becerra, O. Cortes, Costantini, G., Crede, V., D’Angelo, A., Dashyan, N., De Vita, R., Defurne, M., Deur, A., Diehl, S., Djalali, C., Dugger, M., Dupre, R., Egiyan, H., Alaoui, A. El, Fassi, L. El, Elouadrhiri, L., Eugenio, P., Filippi, A., Fogler, C., Gavalian, G., Gilfoyle, G. P., Golubenko, A. A., Gosta, G., Gothe, R. W., Griffioen, K. A., Hafidi, K., Hakobyan, H., Hattawy, M., Hauenstein, F., Hayward, T. B., Heddle, D., Hobart, A., Holtrop, M., Ilieva, Y., Illari, I., Ireland, D. G., Isupov, E. L., Iwamoto, H., Jenkins, D., Jo, H. S., Johnston, R., Joo, K., Joosten, S., Kageya, T., Keith, C. D., Keller, D., Khanal, A., Kim, A., Kim, W., Klein, F. J., Klimenko, V., Kripko, A., Kubarovsky, V., Lanza, L., Leali, M., Lee, S., Li, X., Livingston, K., MacGregor, I. J. D., Marchand, D., Mascagna, V., McKinnon, B., Migliorati, S., Milner, R. G., Mineeva, T., Mokeev, V., Camacho, C. Munoz, Nadel-Turonski, P., Neupane, K., Niccolai, S., Osipenko, M., Ostrovidov, A. I., Pandey, P., Paolone, M., Pappalardo, L. L., Paremuzyan, R., Pasyuk, E., Paul, S. J., Pilleux, N., Pokhrel, M., Poudel, J., Price, J. W., Prok, Y., Radic, A., Ramasubramanian, N., Ratliff, S., Reed, T., Richards, J., Ripani, M., Ritchie, B. G., Ritman, J., Rosner, G., Salgado, C., Schadmand, S., Schott, D., Schumacher, R. A., Scott, M. B. C., Seely, M. L., Seroka, E. M., Shirokov, E. V., Shrestha, U., Sokhan, D., Sparveris, N., Spreafico, M., Strauch, S., Tan, J., Tyson, R., Ungaro, M., Vallarino, S., Venturelli, L., Voskanyan, H., Voutier, E., Wei, X., Williams, R., Wishart, R., Wood, M. H., Yurov, M., Zhang, J., and Zurek, M. Tue .
"Measurement of the helicity asymmetry $${\mathbb {E}}$$ for the $$\vec {\gamma }\vec {p} \rightarrow p \pi ^0$$ reaction in the resonance region: The CLAS Collaboration". Germany. https://doi.org/10.1140/epja/s10050-023-01123-3.
@article{osti_2006520,
title = {Measurement of the helicity asymmetry $${\mathbb {E}}$$ for the $$\vec {\gamma }\vec {p} \rightarrow p \pi ^0$$ reaction in the resonance region: The CLAS Collaboration},
author = {Kim, C. W. and Zachariou, N. and Bashkanov, M. and Briscoe, W. J. and Fegan, S. and Kashevarov, V. L. and Nikonov, K. and Sarantsev, A. and Schmidt, A. and Strakovsky, I. I. and Watts, D. P. and Workman, R. L. and Achenbach, P. and Akbar, Z. and Amaryan, M. J. and Angelini, G. and Armstrong, W. R. and Atac, H. and Baashen, L. and Baltzell, N. A. and Barion, L. and Battaglieri, M. and Bedlinskiy, I. and Benkel, B. and Benmokhtar, F. and Benmouna, N. and Bianconi, A. and Biselli, A. S. and Booth, W. A. and Bossù, F. and Boiarinov, S. and Brinkmann, K. T. and Brock, J. and Bulumulla, D. and Burkert, V. D. and Cao, T. and Carlin, C. and Carman, D. S. and Carvajal, J. C. and Chatagnon, P. and Chesnokov, V. and Chetry, T. and Ciullo, G. and Clash, G. and Cole, P. L. and Contalbrigo, M. and Becerra, O. Cortes and Costantini, G. 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 Alaoui, A. El and Fassi, L. El and Elouadrhiri, L. and Eugenio, P. and Filippi, A. and Fogler, C. and Gavalian, G. and Gilfoyle, G. P. and Golubenko, A. A. and Gosta, G. and Gothe, R. W. and Griffioen, K. A. and Hafidi, K. and Hakobyan, H. and Hattawy, M. and Hauenstein, F. and Hayward, T. B. and Heddle, D. and Hobart, A. and Holtrop, M. and Ilieva, Y. and Illari, I. and Ireland, D. G. and Isupov, E. L. and Iwamoto, H. and Jenkins, D. and Jo, H. S. and Johnston, R. and Joo, K. and Joosten, S. and Kageya, T. and Keith, C. D. and Keller, D. and Khanal, A. and Kim, A. and Kim, W. and Klein, F. J. and Klimenko, V. and Kripko, A. and Kubarovsky, V. and Lanza, L. and Leali, M. and Lee, S. and Li, X. and Livingston, K. and MacGregor, I. J. D. and Marchand, D. and Mascagna, V. and McKinnon, B. and Migliorati, S. and Milner, R. G. and Mineeva, T. and Mokeev, V. and Camacho, C. Munoz and Nadel-Turonski, P. and Neupane, K. and Niccolai, S. and Osipenko, M. and Ostrovidov, A. I. and Pandey, P. and Paolone, M. and Pappalardo, L. L. and Paremuzyan, R. and Pasyuk, E. and Paul, S. J. and Pilleux, N. and Pokhrel, M. and Poudel, J. and Price, J. W. and Prok, Y. and Radic, A. and Ramasubramanian, N. and Ratliff, S. and Reed, T. and Richards, J. and Ripani, M. and Ritchie, B. G. and Ritman, J. and Rosner, G. and Salgado, C. and Schadmand, S. and Schott, D. and Schumacher, R. A. and Scott, M. B. C. and Seely, M. L. and Seroka, E. M. and Shirokov, E. V. and Shrestha, U. and Sokhan, D. and Sparveris, N. and Spreafico, M. and Strauch, S. and Tan, J. and Tyson, R. and Ungaro, M. and Vallarino, S. and Venturelli, L. and Voskanyan, H. and Voutier, E. and Wei, X. and Williams, R. and Wishart, R. and Wood, M. H. and Yurov, M. and Zhang, J. and Zurek, M.},
abstractNote = {Abstract The double-spin-polarization observable $${\mathbb {E}}$$ E for $$\vec {\gamma }\vec {p}\rightarrow p\pi ^0$$ γ → p → → p π 0 has been measured with the CEBAF Large Acceptance Spectrometer (CLAS) at photon beam energies $$E_\gamma $$ E γ from 0.367 to $$2.173~\textrm{GeV}$$ 2.173 GeV (corresponding to center-of-mass energies from 1.240 to $$2.200~\textrm{GeV}$$ 2.200 GeV ) for pion center-of-mass angles, $$\cos \theta _{\pi ^0}^{c.m.}$$ cos θ π 0 c . m . , between $$-$$ - 0.86 and 0.82. These new CLAS measurements cover a broader energy range and have smaller uncertainties compared to previous CBELSA data and provide an important independent check on systematics. These measurements are compared to predictions as well as new global fits from The George Washington University, Mainz, and Bonn-Gatchina groups. Their inclusion in multipole analyses will allow us to refine our understanding of the single-pion production contribution to the Gerasimov-Drell-Hearn sum rule and improve the determination of resonance properties, which will be presented in a future publication.},
doi = {10.1140/epja/s10050-023-01123-3},
journal = {European Physical Journal. A, Hadrons and Nuclei (Online)},
number = 9,
volume = 59,
place = {Germany},
year = {Tue Sep 26 00:00:00 EDT 2023},
month = {Tue Sep 26 00:00:00 EDT 2023}
}
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- Strakovsky, Igor; Širca, Simon; Briscoe, William J.
- Physical Review C, Vol. 105, Issue 4
First measurement of the helicity asymmetry E in photoproduction on the proton
journal, April 2016
- Senderovich, I.; Morrison, B. T.; Dugger, M.
- Physics Letters B, Vol. 755