On the Off-Mass-Shell Deformation of the Nucleon Structure Function

Details On the Off-Mass-Shell Deformation of the Nucleon Structure Function On the Off-Mass-Shell Deformation of the Nucleon Structure Function

1994-11-25

arxiv.org/abs/nucl-th/9411031v2

Phys.Rev.C53:377-384,1996

Physics

Nuclear Physics

Nuclear Theory

18 pages, latex, 5 figures

Scientific paper

10.1103/PhysRevC.53.377

The off-mass-shell behavior of the nucleon structure function, $F_2^N$, is studied within an approach motivated by the Sullivan model. Deep inelastic scattering on the nucleon is considered in the second order in the pion-nucleon coupling constant, corresponding to the dressing of the bare nucleons by the mesonic cloud. The inclusive and semi-inclusive deep inelastic processes on the deuteron involving off-shell nucleons are considered. A deformation of the mesonic cloud for the off-mass-shell nucleon, compared to the free one, generates observable effects in deep inelastic scattering. In particular, it leads to the breakdown of the convolution model, i.e. the deuteron structure functions are not expressed through the free nucleon structure function. Analysis of the semi-inclusive deep inelastic scattering on the deuteron, in the spectator approximation, shows that this reaction opens new possibilities to study the role of the off-shell effects in determining in detail the nucleon structure function.

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