High-Precision Determination of the Electric and Magnetic Form Factors of the Proton

Bernauer, J. C. and Achenbach, P. and Ayerbe Gayoso, C. and Bohm, R. and Bosnar, Damir and Debenjak, L. and Distler, M. O. and Doria, L. and Esser, A. and Fonvieille, H. and Friedrich, J. M. and Friedrich, J. and Gomez Rodriguez de la Paz, M. and Makek, Mihael and Merkel, H. and Middleton, D. G. and Muller, U. and Nungesser, L. and Pochodzalla, J. and Potokar, M. and Sanchez Majos, S. and Schlimme, B. S. and Širca, S. and Walcher, Th. and Weinriefer, M. (A1 Collaboration) (2010) High-Precision Determination of the Electric and Magnetic Form Factors of the Proton. Physical Review Letters, 105 (24). pp. 242001-4. ISSN 0031-9007

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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 Q2 = 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 1/2=0.879(5)stat(4)syst(2)model(4)group fm and 1/2=0.777(13)stat(9)syst(5)model(2)group fm.

Item Type: Article
Keywords: elastic electron scattering, proton electromagnetic form factors
Date: December 2010
Subjects: NATURAL SCIENCES > Physics
Additional Information: Copyright (2010) by the American Physical Society.
Divisions: Faculty of Science > Department of Physics
Project code: 119-1191005-1021
Publisher: American Physical Society
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 31 May 2014 19:50
Last Modified: 24 Feb 2016 15:27
URI: http://digre.pmf.unizg.hr/id/eprint/2032

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