Measurement of the proton electric to magnetic form factor ratio from vec ¹H(vec e, e'p)

C.B. Crawford , A. Sindile , T. Akdogan , R. Alarcon , W. Bertozzi , E. Booth , T. Botto , J. Calarco

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B. Clasie A. DeGrush T.W. Donnelly K. Dow D. Dutta M. Farkhondeh R. Fatemi O. Filoti W. Franklin H. Gao E. Geis S. Gilad W. Haeberli D. Hasell W. Hersman M. Holtrop P. Karpius M. Kohl H. Kolster T. Lee A. Maschinot J. Matthews K. McIlhany N. Meitanis R.G. Milner J. Rapaport R.P. Redwine J. Seely A. Shinozaki S. Sirca E. Six T. Smith B. Tonguc C. Tschalaer E. Tsentalovich W. Turchinetz J.F.J. van den Brand J. van der Laan F. Wang T. Wise Y. Xiao W. Xu C. Zhang Z. Zhou V. Ziskin T. Zwart

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keywords electricformmagneticmeasurementprotonelasticfactorpolarized

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We report the first precision measurement of the proton electric to magnetic form factor ratio from spin-dependent elastic scattering of longitudinally polarized electrons from a polarized hydrogen internal gas target. The measurement was performed at the MIT-Bates South Hall Ring over a range of four-momentum transfer squared $Q^2$ from 0.15 to 0.65 (GeV/c)$^2$. Significantly improved results on the proton electric and magnetic form factors are obtained in combination with previous cross-section data on elastic electron-proton scattering in the same $Q^2$ region.

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Measurement of the proton electric to magnetic form factor ratio from vec ¹H(vec e, e'p)

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