Quark distrbutions in the nucleon based on a relativistic 3-body approach to the NJL model

Details Quark distrbutions in the nucleon based on a relativistic 3-body approach to the NJL model Quark distrbutions in the nucleon based on a relativistic 3-body approach to the NJL model

1999-07-10

arxiv.org/abs/nucl-th/9907043v1

Phys.Rev.C60:065201,1999

Physics

Nuclear Physics

Nuclear Theory

28 pages, 8 figures

Scientific paper

10.1103/PhysRevC.60.065201

Quark light cone momentum distributions in the nucleon are calculated in a relativistic 3-body approach to the NJL model by using a simple 'static approximation' for the Faddeev kernel. A method is presented which automatically satisfies the number and momentum sum rules, even in the regularized theory. In order to assess the sensitivity to the regularization scheme, two schemes which can be formulated in terms of light cone variables are discussed. The effects of the (composite) pion cloud are taken into account in a convolution approach, and the violation of the Gottfried sum rule is discussed. After performing the Q^2 evolution, the resulting distributions are compared to the empirical ones.

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