title: High-precision determination of the electric and magnetic form factors of the proton.
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 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 <r²E>½ = 0.879(5)stat(4)syst(2)model(4)group fm and <r²M>½ = 0.777(13)stat(9)syst(5)model(2)group fm.
authors.affiliation: Institut für Kernphysik, Johannes Gutenberg-Universität Mainz, 55099 Mainz, Germany. bernauer@mit.edu
authors.forename: J C
authors.initials: JC
authors.lastname: Bernauer
authors.forename: P
authors.initials: P
authors.lastname: Achenbach
authors.forename: C
authors.initials: C
authors.lastname: Ayerbe Gayoso
authors.forename: R
authors.initials: R
authors.lastname: Böhm
authors.forename: D
authors.initials: D
authors.lastname: Bosnar
authors.forename: L
authors.initials: L
authors.lastname: Debenjak
authors.forename: M O
authors.initials: MO
authors.lastname: Distler
authors.forename: L
authors.initials: L
authors.lastname: Doria
authors.forename: A
authors.initials: A
authors.lastname: Esser
authors.forename: H
authors.initials: H
authors.lastname: Fonvieille
authors.forename: J M
authors.initials: JM
authors.lastname: Friedrich
authors.forename: J
authors.initials: J
authors.lastname: Friedrich
authors.forename: M
authors.initials: M
authors.lastname: Gómez Rodríguez de la Paz
authors.forename: M
authors.initials: M
authors.lastname: Makek
authors.forename: H
authors.initials: H
authors.lastname: Merkel
authors.forename: D G
authors.initials: DG
authors.lastname: Middleton
authors.forename: U
authors.initials: U
authors.lastname: Müller
authors.forename: L
authors.initials: L
authors.lastname: Nungesser
authors.forename: J
authors.initials: J
authors.lastname: Pochodzalla
authors.forename: M
authors.initials: M
authors.lastname: Potokar
authors.forename: S
authors.initials: S
authors.lastname: Sánchez Majos
authors.forename: B S
authors.initials: BS
authors.lastname: Schlimme
authors.forename: S
authors.initials: S
authors.lastname: Sirca
authors.forename: Th
authors.initials: T
authors.lastname: Walcher
authors.forename: M
authors.initials: M
authors.lastname: Weinriefer