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Title:
Charge Densities of the Neutron and Proton
Authors:
Miller, Gerald A.
Affiliation:
AA(Department of Physics, University of Washington, Seattle, Washington 98195-1560, USA)
Publication:
Physical Review Letters, vol. 99, Issue 11, id. 112001 (PhRvL Homepage)
Publication Date:
09/2007
Origin:
APS
PACS Keywords:
Protons and neutrons, Electromagnetic form factors
DOI:
10.1103/PhysRevLett.99.112001
Bibliographic Code:
2007PhRvL..99k2001M

Abstract

A model-independent analysis of the infinite-momentum-frame charge density of partons in the transverse plane is presented for the nucleon. We find that the neutron-parton charge density is negative at the center, so that the square of the transverse charge radius is positive, in contrast with many expectations. Additionally, the proton’s central d quark charge density is larger than that of the u quark by about 30%. The proton (neutron) charge density has a long range positively (negatively) charged component.
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