A pure S-wave covariant model for the nucleon

Details A pure S-wave covariant model for the nucleon A pure S-wave covariant model for the nucleon

2006-06-16

arxiv.org/abs/nucl-th/0606029v2

Phys.Rev.C77:015202,2008

Physics

Nuclear Physics

Nuclear Theory

20 pages and 10 figures; greatly expanded version with new fits and discussion of DIS; similar to published version

Scientific paper

10.1103/PhysRevC.77.015202

Using the manifestly covariant spectator theory, and modeling the nucleon as a system of three constituent quarks with their own electromagnetic structure, we show that all four nucleon electromagnetic form factors can be very well described by a manifestly covariant nucleon wave function with zero orbital angular momentum. Since the concept of wave function depends on the formalism, the conclusions of light-cone theory requiring nonzero angular momentum components are not inconsistent with our results. We also show that our model gives a qualitatively correct description of deep inelastic scattering, unifying the phenomenology at high and low momentum transfer. Finally we review two different definitions of nuclear shape and show that the nucleon is spherical in this model, regardless of how shape is defined.

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