Electric and magnetic form factors of the proton
Name
Bernauer-2014-Electric and magnetic.pdf
Size
2.36 MB
Format
Adobe PDF
Checksum (MD5)
6b3bb760e4812244517c554127430a73
Author(s)
Distler, M. O.
Friedrich, J.
Walcher, Th.
Achenbach, P.
Ayerbe Gayoso, C.
Bosnar, D.
Debenjak, L.
Doria, L.
Esser, A.
Fonvieille, H.
Date Issued
July 2014
Journal
Physical Review C
Publisher
American Physical Society
Citation
Bernauer, J. C., M. O. Distler, J. Friedrich, Th. Walcher, P. Achenbach, C. Ayerbe Gayoso, R. Bohm, et al. “Electric and Magnetic Form Factors of the Proton.” Phys. Rev. C 90, no. 1 (July 2014). © 2014 American Physical Society
Version
Final published version
Abstract
This paper describes a precise measurement of electron scattering off the proton at momentum transfers of 0.003 ≲ Q[superscript 2] ≲ 1 GeV[superscript 2]. The average point-to-point error of the cross sections in this experiment is ~0.37%. These data are used for a coherent new analysis together with all world data of unpolarized and polarized electron scattering from the very smallest to the highest momentum transfers so far measured. The extracted electric and magnetic form factors provide new insight into their exact shape, deviating from the classical dipole form, and of structure on top of this gross shape. The data reaching very low Q[superscript 2] values are used for a new determination of the electric and magnetic radii. An empirical determination of the two-photon-exchange correction is presented. The implications of this correction on the radii and the question of a directly visible signal of the pion cloud are addressed.
MIT Department
Massachusetts Institute of Technology. Laboratory for Nuclear Science
Terms of Use
Article is made available in accordance with the publisher's policy and may be subject to US copyright law. Please refer to the publisher's site for terms of use.
Persistent DSpace Link
DOI of Published Version
https://doi.org/10.1103/PhysRevC.90.015206
