Longitudinal target-spin asymmetries for deeply virtual Compton scattering
Abstract
A measurement of the electroproduction of photons off protons in the deeply inelastic regime was performed at Jefferson Lab using a nearly 6-GeV electron beam, a longitudinally polarized proton target and the CEBAF Large Acceptance Spectrometer. Target-spin asymmetries for ep → e'p'y events, which arise from the interference of the deeply virtual Compton scattering and the Bethe-Heitler processes, were extracted over the widest kinematics in Q2, xB, t and Φ, for 166 four-dimensional bins. In the framework of Generalized Parton Distributions (GPDs), at leading twist the t dependence of these asymmetries provides insight on the spatial distribution of the axial charge of the proton, which appears to be concentrated in its center. In conclusion, these results bring important and necessary constraints for the existing parametrizations of chiral-even GPDs.
- 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)
- Contributing Org.:
- CLAS Collaboration
- OSTI Identifier:
- 1167672
- Alternate Identifier(s):
- OSTI ID: 1180421
- Report Number(s):
- JLAB/PHY-14-1978; DOE/OR/23177-3211
Journal ID: ISSN 0031-9007; PRLTAO; ArticleNumber: 032001; FG02-96ER40950; TRN: US1600759
- Grant/Contract Number:
- FG02-96ER40950; AC05-06OR23177
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review Letters
- Additional Journal Information:
- Journal Volume: 114; Journal Issue: 3; Journal ID: ISSN 0031-9007
- Publisher:
- American Physical Society (APS)
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
Citation Formats
Seder, E., Biselli, A., Pisano, S., Niccolai, S., Smith, G. D., Joo, K., Adhikari, K., Amaryan, M. J., Anderson, M. D., Anefalos Pereira, S., Avakian, H., Battaglieri, M., Bedlinskiy, I., Bono, J., Boiarinov, S., Bosted, P., Briscoe, W., Brock, J., Brooks, W. K., Bültmann, S., Burkert, V. D., Carman, D. S., Carlin, C., Celentano, A., Chandavar, S., Charles, G., Colaneri, L., Cole, P. L., Contalbrigo, M., Crabb, D., Crede, V., D’Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Doughty, D., Dupre, R., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fedotov, G., Fegan, S., Filippi, A., Fleming, J. A., Fradi, A., Garillon, B., Garçon, M., Gevorgyan, N., Ghandilyan, Y., Giovanetti, K. L., Girod, F. X., Goetz, J. T., Gohn, W., Gothe, R. W., Griffioen, K. A., Guegan, B., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Hattawy, M., Hirlinger Saylor, N., Holtrop, M., Hughes, S. M., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jo, H. S., Joosten, S., Keith, C. D., Keller, D., Khachatryan, G., Khandaker, M., Kim, A., Kim, W., Klein, A., Klein, F. J., Koirala, S., Kubarovsky, V., Kuhn, S. E., Lenisa, P., Livingston, K., Lu, H. Y., MacGregor, I. J. D., Markov, N., Mayer, M., McKinnon, B., Meekins, D. G., Mineeva, T., Mirazita, M., Mokeev, V., Montgomery, R., Moody, C. I., Moutarde, H., Movsisyan, A., Munoz Camacho, C., Nadel-Turonski, P., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Pappalardo, L. L., Park, K., Park, S., Pasyuk, E., Peng, P., Phelps, W., Pogorelko, O., Price, J. W., Prok, Y., Protopopescu, D., Puckett, A. J. R., Ripani, M., Rizzo, A., Rosner, G., Rossi, P., Roy, P., Sabatié, F., Salgado, C., Schott, D., Schumacher, R. A., Senderovich, I., Simonyan, A., Skorodumina, I., Sokhan, D., Sparveris, N., Stepanyan, S., Stoler, P., Strakovsky, I. I., Strauch, S., Sytnik, V., Taiuti, M., Tang, W., Tian, Y., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Weinstein, L. B., Wood, M. H., Zachariou, N., Zana, L., Zhang, J., and Zonta, I. Longitudinal target-spin asymmetries for deeply virtual Compton scattering. United States: N. p., 2015.
Web. doi:10.1103/PhysRevLett.114.032001.
Seder, E., Biselli, A., Pisano, S., Niccolai, S., Smith, G. D., Joo, K., Adhikari, K., Amaryan, M. J., Anderson, M. D., Anefalos Pereira, S., Avakian, H., Battaglieri, M., Bedlinskiy, I., Bono, J., Boiarinov, S., Bosted, P., Briscoe, W., Brock, J., Brooks, W. K., Bültmann, S., Burkert, V. D., Carman, D. S., Carlin, C., Celentano, A., Chandavar, S., Charles, G., Colaneri, L., Cole, P. L., Contalbrigo, M., Crabb, D., Crede, V., D’Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Doughty, D., Dupre, R., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fedotov, G., Fegan, S., Filippi, A., Fleming, J. A., Fradi, A., Garillon, B., Garçon, M., Gevorgyan, N., Ghandilyan, Y., Giovanetti, K. L., Girod, F. X., Goetz, J. T., Gohn, W., Gothe, R. W., Griffioen, K. A., Guegan, B., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Hattawy, M., Hirlinger Saylor, N., Holtrop, M., Hughes, S. M., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jo, H. S., Joosten, S., Keith, C. D., Keller, D., Khachatryan, G., Khandaker, M., Kim, A., Kim, W., Klein, A., Klein, F. J., Koirala, S., Kubarovsky, V., Kuhn, S. E., Lenisa, P., Livingston, K., Lu, H. Y., MacGregor, I. J. D., Markov, N., Mayer, M., McKinnon, B., Meekins, D. G., Mineeva, T., Mirazita, M., Mokeev, V., Montgomery, R., Moody, C. I., Moutarde, H., Movsisyan, A., Munoz Camacho, C., Nadel-Turonski, P., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Pappalardo, L. L., Park, K., Park, S., Pasyuk, E., Peng, P., Phelps, W., Pogorelko, O., Price, J. W., Prok, Y., Protopopescu, D., Puckett, A. J. R., Ripani, M., Rizzo, A., Rosner, G., Rossi, P., Roy, P., Sabatié, F., Salgado, C., Schott, D., Schumacher, R. A., Senderovich, I., Simonyan, A., Skorodumina, I., Sokhan, D., Sparveris, N., Stepanyan, S., Stoler, P., Strakovsky, I. I., Strauch, S., Sytnik, V., Taiuti, M., Tang, W., Tian, Y., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Weinstein, L. B., Wood, M. H., Zachariou, N., Zana, L., Zhang, J., & Zonta, I. Longitudinal target-spin asymmetries for deeply virtual Compton scattering. United States. https://doi.org/10.1103/PhysRevLett.114.032001
Seder, E., Biselli, A., Pisano, S., Niccolai, S., Smith, G. D., Joo, K., Adhikari, K., Amaryan, M. J., Anderson, M. D., Anefalos Pereira, S., Avakian, H., Battaglieri, M., Bedlinskiy, I., Bono, J., Boiarinov, S., Bosted, P., Briscoe, W., Brock, J., Brooks, W. K., Bültmann, S., Burkert, V. D., Carman, D. S., Carlin, C., Celentano, A., Chandavar, S., Charles, G., Colaneri, L., Cole, P. L., Contalbrigo, M., Crabb, D., Crede, V., D’Angelo, A., Dashyan, N., De Vita, R., De Sanctis, E., Deur, A., Djalali, C., Doughty, D., Dupre, R., El Fassi, L., Elouadrhiri, L., Eugenio, P., Fedotov, G., Fegan, S., Filippi, A., Fleming, J. A., Fradi, A., Garillon, B., Garçon, M., Gevorgyan, N., Ghandilyan, Y., Giovanetti, K. L., Girod, F. X., Goetz, J. T., Gohn, W., Gothe, R. W., Griffioen, K. A., Guegan, B., Guidal, M., Guo, L., Hafidi, K., Hakobyan, H., Hanretty, C., Harrison, N., Hattawy, M., Hirlinger Saylor, N., Holtrop, M., Hughes, S. M., Ilieva, Y., Ireland, D. G., Ishkhanov, B. S., Isupov, E. L., Jo, H. S., Joosten, S., Keith, C. D., Keller, D., Khachatryan, G., Khandaker, M., Kim, A., Kim, W., Klein, A., Klein, F. J., Koirala, S., Kubarovsky, V., Kuhn, S. E., Lenisa, P., Livingston, K., Lu, H. Y., MacGregor, I. J. D., Markov, N., Mayer, M., McKinnon, B., Meekins, D. G., Mineeva, T., Mirazita, M., Mokeev, V., Montgomery, R., Moody, C. I., Moutarde, H., Movsisyan, A., Munoz Camacho, C., Nadel-Turonski, P., Niculescu, I., Osipenko, M., Ostrovidov, A. I., Paolone, M., Pappalardo, L. L., Park, K., Park, S., Pasyuk, E., Peng, P., Phelps, W., Pogorelko, O., Price, J. W., Prok, Y., Protopopescu, D., Puckett, A. J. R., Ripani, M., Rizzo, A., Rosner, G., Rossi, P., Roy, P., Sabatié, F., Salgado, C., Schott, D., Schumacher, R. A., Senderovich, I., Simonyan, A., Skorodumina, I., Sokhan, D., Sparveris, N., Stepanyan, S., Stoler, P., Strakovsky, I. I., Strauch, S., Sytnik, V., Taiuti, M., Tang, W., Tian, Y., Ungaro, M., Voskanyan, H., Voutier, E., Walford, N. K., Watts, D. P., Wei, X., Weinstein, L. B., Wood, M. H., Zachariou, N., Zana, L., Zhang, J., and Zonta, I. Thu .
"Longitudinal target-spin asymmetries for deeply virtual Compton scattering". United States. https://doi.org/10.1103/PhysRevLett.114.032001. https://www.osti.gov/servlets/purl/1167672.
@article{osti_1167672,
title = {Longitudinal target-spin asymmetries for deeply virtual Compton scattering},
author = {Seder, E. and Biselli, A. and Pisano, S. and Niccolai, S. and Smith, G. D. and Joo, K. and Adhikari, K. and Amaryan, M. J. and Anderson, M. D. and Anefalos Pereira, S. and Avakian, H. and Battaglieri, M. and Bedlinskiy, I. and Bono, J. and Boiarinov, S. and Bosted, P. and Briscoe, W. and Brock, J. and Brooks, W. K. and Bültmann, S. and Burkert, V. D. and Carman, D. S. and Carlin, C. and Celentano, A. and Chandavar, S. and Charles, G. and Colaneri, L. and Cole, P. L. and Contalbrigo, M. and Crabb, D. and Crede, V. and D’Angelo, A. and Dashyan, N. and De Vita, R. and De Sanctis, E. and Deur, A. and Djalali, C. and Doughty, D. and Dupre, R. and El Fassi, L. and Elouadrhiri, L. and Eugenio, P. and Fedotov, G. and Fegan, S. and Filippi, A. and Fleming, J. A. and Fradi, A. and Garillon, B. and Garçon, M. and Gevorgyan, N. and Ghandilyan, Y. and Giovanetti, K. L. and Girod, F. X. and Goetz, J. T. and Gohn, W. and Gothe, R. W. and Griffioen, K. A. and Guegan, B. and Guidal, M. and Guo, L. and Hafidi, K. and Hakobyan, H. and Hanretty, C. and Harrison, N. and Hattawy, M. and Hirlinger Saylor, N. and Holtrop, M. and Hughes, S. M. and Ilieva, Y. and Ireland, D. G. and Ishkhanov, B. S. and Isupov, E. L. and Jo, H. S. and Joosten, S. and Keith, C. D. and Keller, D. and Khachatryan, G. and Khandaker, M. and Kim, A. and Kim, W. and Klein, A. and Klein, F. J. and Koirala, S. and Kubarovsky, V. and Kuhn, S. E. and Lenisa, P. and Livingston, K. and Lu, H. Y. and MacGregor, I. J. D. and Markov, N. and Mayer, M. and McKinnon, B. and Meekins, D. G. and Mineeva, T. and Mirazita, M. and Mokeev, V. and Montgomery, R. and Moody, C. I. and Moutarde, H. and Movsisyan, A. and Munoz Camacho, C. and Nadel-Turonski, P. and Niculescu, I. and Osipenko, M. and Ostrovidov, A. I. and Paolone, M. and Pappalardo, L. L. and Park, K. and Park, S. and Pasyuk, E. and Peng, P. and Phelps, W. and Pogorelko, O. and Price, J. W. and Prok, Y. and Protopopescu, D. and Puckett, A. J. R. and Ripani, M. and Rizzo, A. and Rosner, G. and Rossi, P. and Roy, P. and Sabatié, F. and Salgado, C. and Schott, D. and Schumacher, R. A. and Senderovich, I. and Simonyan, A. and Skorodumina, I. and Sokhan, D. and Sparveris, N. and Stepanyan, S. and Stoler, P. and Strakovsky, I. I. and Strauch, S. and Sytnik, V. and Taiuti, M. and Tang, W. and Tian, Y. and Ungaro, M. and Voskanyan, H. and Voutier, E. and Walford, N. K. and Watts, D. P. and Wei, X. and Weinstein, L. B. and Wood, M. H. and Zachariou, N. and Zana, L. and Zhang, J. and Zonta, I.},
abstractNote = {A measurement of the electroproduction of photons off protons in the deeply inelastic regime was performed at Jefferson Lab using a nearly 6-GeV electron beam, a longitudinally polarized proton target and the CEBAF Large Acceptance Spectrometer. Target-spin asymmetries for ep → e'p'y events, which arise from the interference of the deeply virtual Compton scattering and the Bethe-Heitler processes, were extracted over the widest kinematics in Q2, xB, t and Φ, for 166 four-dimensional bins. In the framework of Generalized Parton Distributions (GPDs), at leading twist the t dependence of these asymmetries provides insight on the spatial distribution of the axial charge of the proton, which appears to be concentrated in its center. In conclusion, these results bring important and necessary constraints for the existing parametrizations of chiral-even GPDs.},
doi = {10.1103/PhysRevLett.114.032001},
journal = {Physical Review Letters},
number = 3,
volume = 114,
place = {United States},
year = {Thu Jan 22 00:00:00 EST 2015},
month = {Thu Jan 22 00:00:00 EST 2015}
}
Web of Science
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