%ALiyanage, A.%AArmstrong, W.%AKang, H.%AMaxwell, J.%AMulholland, J.%ANdukum, L.%AAhmidouch, A.%AAlbayrak, I.%AAsaturyan, A.%AAtes, O.%ABaghdasaryan, H.%ABoeglin, W.%ABosted, P.%ABrash, E.%AButuceanu, C.%ABychkov, M.%ACarter, P.%AChen, C.%AChen, J.-P.%AChoi, S.%AChristy, E.%ACovrig, S.%ACrabb, D.%ADanagoulian, S.%ADaniel, A.:%ADavis, B.%ADay, D.%ADeconinck, W.%ADeur, A.%ADunne, J.%ADutta, D.%AEl Fassi, L.%AElaasar, M.%AEllis, C.%AEnt, R.%AFlay, D.%AFrlez, E.%AGaskell, D.%AGeagla, O.%AGerman, J.%AGilman, R.%AGogami, T.%AGomez, J.%AGoncharenko, Y.%AHashimoto, O.%AHiginbotham, D.%AHorn, T.%AHuber, G.%AJones, M.%AJones, M.K.%AKalantarians, N.%AKang, H.-K.%AKawama, D.%AKeppel, C.%AKhandaker, M.%AKim, Y.%AKing, P.%AKohl, M.%AKovacs, K.%AKubarovsky, V.%ALi, Y.%ALiyanage, N.%AMamyan, V.%AMarkowitz, P.%AMaruta, T.%AMelnik, Y.%AMeziani, Z.-E.%AMkrtchyan, A.%AMkrtchyan, H.%AMochalov, V.%AMonaghan, P.%ANarayan, A.%ANakamura, S.%ANuruzzaman, N.%APentchev, L.%APocanic, D.%APosik, M.%APuckett, A.%AQiu, X.%AReinhold, J.%ARiordan, S.%ARoche, J.%ARondón, O.A.%ASawatzky, B.%AShabestari, M.%ASlifer, K.%ASmith, G.%ASoloviev, L.%ASolvignon, P.%ATadevosyan, V.%ATang, L.%AVasiliev, A.%AVeilleux, M.%AWalton, T.%AWesselmann, F.%AWood, S.%AYao, H.%AYe, Z.%AZhu, L.%BJournal Name: Physical review; Journal Volume: 101; Journal Issue: 3 %D2020%I %JJournal Name: Physical review; Journal Volume: 101; Journal Issue: 3 %K %MOSTI ID: 10175967 %PMedium: X %TProton form factor ratio \mu_p G_E^p/G_M^p from double spin asymmetry %XThe 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. %0Journal Article