The Tensor Structure Function b₂(x,Q²) of the Deuteron at Small x
Schaefer, W.
Original · EN
The dependence of the diffractive nuclear shadowing and the nuclear pion excess effect on the deuteron spin alignment leads to a substantial tensor polarisation of sea partons in the deuteron. The corresponding tensor structure function b₂(x,Q²) rises towards small x, and we predict the about one percent tensor asymmetry A₂(x,Q²) =b₂(x,Q²)/F₂D(x,Q²). We calculate the shadowing of the gluon distribution in the deuteron for two different pomeron gluon-distributions. For a hard gluon dominated -structure function, as advocated by H1, we find large gluon shadowing, which appears to be in conflict with the DGLAP analysis of nuclear SF's.
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