Model-independent extraction of the proton charge radius from electron scattering

Journal Article · Wed Dec 01 00:00:00 EST 2010 · Physical Review. D, Particles Fields

DOI:https://doi.org/10.1103/PHYSREVD.82.113005· OSTI ID:21503712

Hill, Richard J; Paz, Gil ^[1]

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1. Enrico Fermi Institute and Department of Physics, University of Chicago, Chicago, Illinois 60637 (United States)

Constraints from analyticity are combined with experimental electron-proton scattering data to determine the proton charge radius. In contrast to previous determinations, we provide a systematic procedure for analyzing arbitrary data without model-dependent assumptions on the form-factor shape. We also investigate the impact of including electron-neutron scattering data, and {pi}{pi}{yields}NN data. Using representative data sets we find r{sub E}{sup p}=0.870{+-}0.023{+-}0.012 fm using just proton scattering data; r{sub E}{sup p}=0.880{sub -0.020}{sup +0.017{+-}}0.007 fm adding neutron data; and r{sub E}{sup p}=0.871{+-}0.009{+-}0.002{+-}0.002 fm adding {pi}{pi} data. The analysis can be readily extended to other nucleon form factors and derived observables.

• OSTI ID: 21503712
• Journal Information: Physical Review. D, Particles Fields, Vol. 82, Issue 11; Other Information: DOI: 10.1103/PhysRevD.82.113005; (c) 2010 American Institute of Physics; ISSN 0556-2821
• Country of Publication: United States
• Language: English

Related Subjects

72 PHYSICS OF ELEMENTARY PARTICLES AND FIELDS
ELECTRON-NEUTRON INTERACTIONS
ELECTRON-PROTON INTERACTIONS
ELECTRONS
EXTRACTION
FORM FACTORS
NEUTRONS
PARTICLE RADII
PION-PION INTERACTIONS
PROTONS
SCATTERING
BARYONS
DIMENSIONLESS NUMBERS
ELECTRON-NUCLEON INTERACTIONS
ELEMENTARY PARTICLES
FERMIONS
HADRON-HADRON INTERACTIONS
HADRONS
INTERACTIONS
LEPTON-BARYON INTERACTIONS
LEPTON-HADRON INTERACTIONS
LEPTON-NUCLEON INTERACTIONS
LEPTONS
MESON-MESON INTERACTIONS
NUCLEONS
PARTICLE INTERACTIONS
PARTICLE PROPERTIES
SEPARATION PROCESSES