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Title: Proton form factor ratio μ p G E p / G M p from double spin asymmetry

Abstract

The ratio of the electric to magnetic form factors of the proton, μ p G p E / G p M , has been measured for elastic electron-proton scattering with polarized beam and target up to four-momentum transfer squared Q 2 = 5.66 ( GeV / c ) 2 using double spin asymmetry for target spin orientation aligned nearly perpendicular to the beam momentum direction. This measurement of μ p G p E / G p M agrees with the Q 2 dependence of previous recoil polarization data and reconfirms the discrepancy at high Q 2 between the Rosenbluth and the polarization-transfer method with a different measurement technique and systematic uncertainties uncorrelated to those of the recoil-polarization measurements. The form factor ratio at Q 2 = 2.06 ( GeV / c ) 2 has been measured as μ p G p E / G p M = 0.720 ± 0 . 176 stat ± 0 . 039 sys , which is in agreement with an earlier measurement using the polarized target technique at similar kinematics. The form factor ratio at Q 2 = 5.66 ( GeV / c ) 2 has been determined as μ p G p E /more » G p M = 0.244 ± 0 . 353 stat ± 0 . 013 sys , which represents the highest Q 2 measurement reached using double spin asymmetries with polarized target to date.« less

Authors:
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Publication Date:
Research Org.:
Thomas Jefferson National Accelerator Facility (TJNAF), Newport News, VA (United States); Mississippi State Univ., Starkville, MS (United States)
Sponsoring Org.:
USDOE Office of Science (SC), Nuclear Physics (NP); National Science Foundation (NSF); Natural Sciences and Engineering Research Council of Canada (NSERC)
Contributing Org.:
SANE Collaboration
OSTI Identifier:
1605544
Alternate Identifier(s):
OSTI ID: 1604858; OSTI ID: 1778967
Report Number(s):
JLAB-PHY-20-3164; DOE/OR/23177-4944; arXiv:1806.11156
Journal ID: ISSN 2469-9985; PRVCAN
Grant/Contract Number:  
SC0003884; SC0013941; FG02-96ER40950; AC05-06OR23177; PHY-0855473; PHY-1207672; HRD-1649909; FG02-07ER41528
Resource Type:
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 101; Journal Issue: 3; Journal ID: ISSN 2469-9985
Publisher:
American Physical Society (APS)
Country of Publication:
United States
Language:
English
Subject:
73 NUCLEAR PHYSICS AND RADIATION PHYSICS

Citation Formats

Liyanage, A., Armstrong, W., Kang, H., Maxwell, J., Mulholland, J., Ndukum, L., Ahmidouch, A., Albayrak, I., Asaturyan, A., Ates, O., Baghdasaryan, H., Boeglin, W., Bosted, P., Brash, E., Butuceanu, C., Bychkov, M., Carter, P., Chen, C., Chen, J. -P., Choi, S., Christy, E., Covrig, S., Crabb, D., Danagoulian, S., Daniel, A., Davidenko, A. M., Davis, B., Day, D., Deconinck, W., Deur, A., Dunne, J., Dutta, D., Fassi, L. El, Elaasar, M., Ellis, C., Ent, R., Flay, D., Frlez, E., Gaskell, D., Geagla, O., German, J., Gilman, R., Gogami, T., Gomez, J., Goncharenko, Y. M., Hashimoto, O., Higinbotham, D., Horn, T., Huber, G. M., Jones, M., Jones, M. K., Kalantarians, N., Kang, H. -K., Kawama, D., Keppel, C., Khandaker, M., Kim, Y., King, P. M., Kohl, M., Kovacs, K., Kubarovsky, V., Li, Y., Liyanage, N., Mamyan, V., Markowitz, P., Maruta, T., Melnik, Y. M., Meziani, Z. -E., Mkrtchyan, A., Mkrtchyan, H., Mochalov, V. V., Monaghan, P., Narayan, A., Nakamura, S. N., Nuruzzaman,, Pentchev, L., Pocanic, D., Posik, M., Puckett, A., Qiu, X., Reinhold, J., Riordan, S., Roche, J., Rondón, O. A., Sawatzky, B., Shabestari, M., Slifer, K., Smith, G., Soloviev, L. F., Solvignon, P., Tadevosyan, V., Tang, L., Vasiliev, A. N., Veilleux, M., Walton, T., Wesselmann, F., Wood, S. A., Yao, H., Ye, Z., and Zhu, L. Proton form factor ratio μpGEp/GMp from double spin asymmetry. United States: N. p., 2020. Web. doi:10.1103/PhysRevC.101.035206.
Liyanage, A., Armstrong, W., Kang, H., Maxwell, J., Mulholland, J., Ndukum, L., Ahmidouch, A., Albayrak, I., Asaturyan, A., Ates, O., Baghdasaryan, H., Boeglin, W., Bosted, P., Brash, E., Butuceanu, C., Bychkov, M., Carter, P., Chen, C., Chen, J. -P., Choi, S., Christy, E., Covrig, S., Crabb, D., Danagoulian, S., Daniel, A., Davidenko, A. M., Davis, B., Day, D., Deconinck, W., Deur, A., Dunne, J., Dutta, D., Fassi, L. El, Elaasar, M., Ellis, C., Ent, R., Flay, D., Frlez, E., Gaskell, D., Geagla, O., German, J., Gilman, R., Gogami, T., Gomez, J., Goncharenko, Y. M., Hashimoto, O., Higinbotham, D., Horn, T., Huber, G. M., Jones, M., Jones, M. K., Kalantarians, N., Kang, H. -K., Kawama, D., Keppel, C., Khandaker, M., Kim, Y., King, P. M., Kohl, M., Kovacs, K., Kubarovsky, V., Li, Y., Liyanage, N., Mamyan, V., Markowitz, P., Maruta, T., Melnik, Y. M., Meziani, Z. -E., Mkrtchyan, A., Mkrtchyan, H., Mochalov, V. V., Monaghan, P., Narayan, A., Nakamura, S. N., Nuruzzaman,, Pentchev, L., Pocanic, D., Posik, M., Puckett, A., Qiu, X., Reinhold, J., Riordan, S., Roche, J., Rondón, O. A., Sawatzky, B., Shabestari, M., Slifer, K., Smith, G., Soloviev, L. F., Solvignon, P., Tadevosyan, V., Tang, L., Vasiliev, A. N., Veilleux, M., Walton, T., Wesselmann, F., Wood, S. A., Yao, H., Ye, Z., & Zhu, L. Proton form factor ratio μpGEp/GMp from double spin asymmetry. United States. doi:https://doi.org/10.1103/PhysRevC.101.035206
Liyanage, A., Armstrong, W., Kang, H., Maxwell, J., Mulholland, J., Ndukum, L., Ahmidouch, A., Albayrak, I., Asaturyan, A., Ates, O., Baghdasaryan, H., Boeglin, W., Bosted, P., Brash, E., Butuceanu, C., Bychkov, M., Carter, P., Chen, C., Chen, J. -P., Choi, S., Christy, E., Covrig, S., Crabb, D., Danagoulian, S., Daniel, A., Davidenko, A. M., Davis, B., Day, D., Deconinck, W., Deur, A., Dunne, J., Dutta, D., Fassi, L. El, Elaasar, M., Ellis, C., Ent, R., Flay, D., Frlez, E., Gaskell, D., Geagla, O., German, J., Gilman, R., Gogami, T., Gomez, J., Goncharenko, Y. M., Hashimoto, O., Higinbotham, D., Horn, T., Huber, G. M., Jones, M., Jones, M. K., Kalantarians, N., Kang, H. -K., Kawama, D., Keppel, C., Khandaker, M., Kim, Y., King, P. M., Kohl, M., Kovacs, K., Kubarovsky, V., Li, Y., Liyanage, N., Mamyan, V., Markowitz, P., Maruta, T., Melnik, Y. M., Meziani, Z. -E., Mkrtchyan, A., Mkrtchyan, H., Mochalov, V. V., Monaghan, P., Narayan, A., Nakamura, S. N., Nuruzzaman,, Pentchev, L., Pocanic, D., Posik, M., Puckett, A., Qiu, X., Reinhold, J., Riordan, S., Roche, J., Rondón, O. A., Sawatzky, B., Shabestari, M., Slifer, K., Smith, G., Soloviev, L. F., Solvignon, P., Tadevosyan, V., Tang, L., Vasiliev, A. N., Veilleux, M., Walton, T., Wesselmann, F., Wood, S. A., Yao, H., Ye, Z., and Zhu, L. Mon . "Proton form factor ratio μpGEp/GMp from double spin asymmetry". United States. doi:https://doi.org/10.1103/PhysRevC.101.035206. https://www.osti.gov/servlets/purl/1605544.
@article{osti_1605544,
title = {Proton form factor ratio μpGEp/GMp from double spin asymmetry},
author = {Liyanage, A. and Armstrong, W. and Kang, H. and Maxwell, J. and Mulholland, J. and Ndukum, L. and Ahmidouch, A. and Albayrak, I. and Asaturyan, A. and Ates, O. and Baghdasaryan, H. and Boeglin, W. and Bosted, P. and Brash, E. and Butuceanu, C. and Bychkov, M. and Carter, P. and Chen, C. and Chen, J. -P. and Choi, S. and Christy, E. and Covrig, S. and Crabb, D. and Danagoulian, S. and Daniel, A. and Davidenko, A. M. and Davis, B. and Day, D. and Deconinck, W. and Deur, A. and Dunne, J. and Dutta, D. and Fassi, L. El and Elaasar, M. and Ellis, C. and Ent, R. and Flay, D. and Frlez, E. and Gaskell, D. and Geagla, O. and German, J. and Gilman, R. and Gogami, T. and Gomez, J. and Goncharenko, Y. M. and Hashimoto, O. and Higinbotham, D. and Horn, T. and Huber, G. M. and Jones, M. and Jones, M. K. and Kalantarians, N. and Kang, H. -K. and Kawama, D. and Keppel, C. and Khandaker, M. and Kim, Y. and King, P. M. and Kohl, M. and Kovacs, K. and Kubarovsky, V. and Li, Y. and Liyanage, N. and Mamyan, V. and Markowitz, P. and Maruta, T. and Melnik, Y. M. and Meziani, Z. -E. and Mkrtchyan, A. and Mkrtchyan, H. and Mochalov, V. V. and Monaghan, P. and Narayan, A. and Nakamura, S. N. and Nuruzzaman, and Pentchev, L. and Pocanic, D. and Posik, M. and Puckett, A. and Qiu, X. and Reinhold, J. and Riordan, S. and Roche, J. and Rondón, O. A. and Sawatzky, B. and Shabestari, M. and Slifer, K. and Smith, G. and Soloviev, L. F. and Solvignon, P. and Tadevosyan, V. and Tang, L. and Vasiliev, A. N. and Veilleux, M. and Walton, T. and Wesselmann, F. and Wood, S. A. and Yao, H. and Ye, Z. and Zhu, L.},
abstractNote = {The ratio of the electric to magnetic form factors of the proton, μ p G p E / G p M , has been measured for elastic electron-proton scattering with polarized beam and target up to four-momentum transfer squared Q 2 = 5.66 ( GeV / c ) 2 using double spin asymmetry for target spin orientation aligned nearly perpendicular to the beam momentum direction. This measurement of μ p G p E / G p M agrees with the Q 2 dependence of previous recoil polarization data and reconfirms the discrepancy at high Q 2 between the Rosenbluth and the polarization-transfer method with a different measurement technique and systematic uncertainties uncorrelated to those of the recoil-polarization measurements. The form factor ratio at Q 2 = 2.06 ( GeV / c ) 2 has been measured as μ p G p E / G p M = 0.720 ± 0 . 176 stat ± 0 . 039 sys , which is in agreement with an earlier measurement using the polarized target technique at similar kinematics. The form factor ratio at Q 2 = 5.66 ( GeV / c ) 2 has been determined as μ p G p E / G p M = 0.244 ± 0 . 353 stat ± 0 . 013 sys , which represents the highest Q 2 measurement reached using double spin asymmetries with polarized target to date.},
doi = {10.1103/PhysRevC.101.035206},
journal = {Physical Review C},
number = 3,
volume = 101,
place = {United States},
year = {2020},
month = {3}
}

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