Spin structure in non-forward partons

Details Spin structure in non-forward partons Spin structure in non-forward partons

2001-02-04

arxiv.org/abs/hep-ph/0102036v1

Phys.Rev. D65 (2002) 074025

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages

Scientific paper

10.1103/PhysRevD.65.074025

Renormalisation induces anomalous contributions in light-cone correlation functions. We discuss the role of the axial anomaly and gluon topology in non-forward parton distributions noting that non-forward matrix elements of the gluonic Chern-Simons current K_{\mu} are not gauge-invariant even in perturbation theory. The axial anomaly means that one has to be careful how to interpret information from hard exclusive reactions about the orbital angular-momentum carried by the proton's internal constituents.

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