@article{426018d6a4d340d89798c9f6127204f0,
title = "Proton form factor ratio μp GEp/GMp from double spin asymmetry",
abstract = "The ratio of the electric to magnetic form factors of the proton, μpGEp/GMp, has been measured for elastic electron-proton scattering with polarized beam and target up to four-momentum transfer squared Q2=5.66(GeV/c)2 using double spin asymmetry for target spin orientation aligned nearly perpendicular to the beam momentum direction. This measurement of μpGEp/GMp agrees with the Q2 dependence of previous recoil polarization data and reconfirms the discrepancy at high Q2 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 Q2=2.06(GeV/c)2 has been measured as μpGEp/GMp=0.720±0.176stat±0.039sys, which is in agreement with an earlier measurement using the polarized target technique at similar kinematics. The form factor ratio at Q2=5.66(GeV/c)2 has been determined as μpGEp/GMp=0.244±0.353stat±0.013sys, which represents the highest Q2 measurement reached using double spin asymmetries with polarized target to date.",
author = "{SANE Collaboration} and A. Liyanage and W. Armstrong and H. Kang and J. Maxwell and J. Mulholland and L. Ndukum and A. Ahmidouch and I. Albayrak and A. Asaturyan and O. Ates and H. Baghdasaryan and W. Boeglin and P. Bosted and E. Brash and C. Butuceanu and M. Bychkov and P. Carter and C. Chen and Chen, {J. P.} and S. Choi and E. Christy and S. Covrig and D. Crabb and S. Danagoulian and A. Daniel and Davidenko, {A. M.} and B. Davis and D. Day and W. Deconinck and A. Deur and J. Dunne and D. Dutta and Fassi, {L. El} and M. Elaasar and C. Ellis and R. Ent and D. Flay and E. Frlez and D. Gaskell and O. Geagla and J. German and R. Gilman and T. Gogami and J. Gomez and Goncharenko, {Y. M.} and O. Hashimoto and D. Higinbotham and T. Horn and Huber, {G. M.} and Nakamura, {S. N.}",
note = "Funding Information: This work was supported by grants from DOE (DE-SC0003884, DE-SC-0013941, and DE-FG02-96ER40950), NSF (PHY-0855473, PHY-1207672, HRD-1649909) and Natural Sciences and Engineering Research Council of Canada (NSERC). This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics under contract DE-AC05-06OR23177. Publisher Copyright: {\textcopyright} 2020 American Physical Society.",
year = "2020",
month = mar,
doi = "10.1103/PhysRevC.101.035206",
language = "English",
volume = "101",
journal = "Physical Review C",
issn = "2469-9985",
publisher = "American Physical Society",
number = "3",
}