The Double Scattering Contribution to $b_1(x,Q^2)$ in the Deuteron

Details The Double Scattering Contribution to $b_1(x,Q^2)$ in the Deuteron The Double Scattering Contribution to $b_1(x,Q^2)$ in the Deuteron

1997-11-13

arxiv.org/abs/hep-ph/9711323v2

Phys.Rev. D57 (1998) 6906-6911

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 5 figures, BoxedEPS, REVTeX; correspondence to jaffe@mitlns.mit.edu ; discussion of impact parameter dependence of s

Scientific paper

10.1103/PhysRevD.57.6906

We study the tensor structure function $b_1\xq$ in deep inelastic scattering (DIS) of an electron from a polarized deuteron target. We model the electron-nucleon cross section at the starting point for $Q^2$ evolution by vector-meson-dominance (VMD). Shadowing due to the double-scattering of vector mesons, along with the presence of a d-state admixture in ground state deuteron wave function gives rise to a non-vanishing contribution to $b_1\xq$. Although significant at large Bjorken $x$, the restoration of rotational symmetry for small $x$ ($\leq10^{-3}$) requires that $b_1^{(2)}\xq$ approach zero as $x\to 0$ in this model. If the model is valid, it should apply within the range of present fixed target experiments.

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