High-precision determination of the electric and magnetic form factors of the proton

Journal Article · Fri Oct 21 00:00:00 EDT 2011 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.3647361· OSTI ID:21611891

Bernauer, Jan C ^[1]

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1. Institut fuer Kernphysik, Johannes Gutenberg-Universitaet Mainz, 55099 Mainz (Germany)

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{sup 2} = (GeV/c){sup 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{sub E}{sup 2} rpost={sup >>1/2} 0.879(5){sub stat.}(4){sub syst.}(2){sub model}(4){sub group}fm and r{sub M}{sup 2} {sup 1/2} = 0.777(13){sub stat.}(9){sub syst.}(5)model({sub 2})groupfm.

• OSTI ID: 21611891
• Journal Information: AIP Conference Proceedings, Vol. 1388, Issue 1; Conference: BARYONS' 10: International conference on the structure of baryons, Osaka (Japan), 7-11 Dec 2010; Other Information: DOI: 10.1063/1.3647361; (c) 2011 American Institute of Physics; Country of input: International Atomic Energy Agency (IAEA); ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
CROSS SECTIONS
ELASTIC SCATTERING
ELECTROMAGNETIC FORM FACTORS
ELECTRON-PROTON INTERACTIONS
FOUR MOMENTUM TRANSFER
GEV RANGE
MONTE CARLO METHOD
PARTICLE RADII
PHOTONS
PIONS
PROTONS
BARYONS
BOSONS
CALCULATION METHODS
DIMENSIONLESS NUMBERS
ELECTRON-NUCLEON INTERACTIONS
ELEMENTARY PARTICLES
ENERGY RANGE
FERMIONS
FORM FACTORS
HADRONS
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
MASSLESS PARTICLES
MESONS
MOMENTUM TRANSFER
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
PSEUDOSCALAR MESONS
SCATTERING