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23 April 2024

» arxiv » 1007.5076

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High-precision determination of the electric and magnetic form factors of the proton
J. C. Bernauer ; P. Achenbach ; C. Ayerbe Gayoso ; R. Böhm ; D. Bosnar ; L. Debenjak ; M. O. Distler ; L. Doria ; A. Esser ; H. Fonvieille ; M. Gómez Rodríguez de la Paz ; J. M. Friedrich ; J. Friedrich ; M. Makek ; H. Merkel ; D. G. Middleton ; U. Müller ; L. Nungesser ; J. Pochodzalla ; M. Potokar ; Sánchez Majos ; B.S. Schlimme ; S. Širca ; Th. Walcher ; M. Weinriefer ;
Date:	28 Jul 2010
Abstract:	New precise results of a measurement of the elastic electron-proton scattering cross section performed at the Mainz Microtron MAMI are presented. About 1400 cross sections were measured with negative four-momentum transfers squared up to Q^2=1 (GeV/c)^2 with statistical errors below 0.2%. The electric and magnetic form factors of the proton were extracted by fits of a large variety of form factor models directly to the cross sections. The form factors show some features at the scale of the pion cloud. The charge and magnetic radii are determined to be r_E=0.879(5)(stat.)(4)(syst.)(2)(model)(4)(group) fm and r_M=0.777(13)(stat.)(9)(syst.)(5)(model)(2)(group) fm.
Source:	arXiv, 1007.5076
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