Polarized Parton Distributions in Light-Front Dynamics

Details Polarized Parton Distributions in Light-Front Dynamics Polarized Parton Distributions in Light-Front Dynamics

1999-07-21

arxiv.org/abs/hep-ph/9907442v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

10 pages, 4 figures, sprocl.sty (included). Proceedings of the Second International Conference on Perspectives in Hadronic Phy

Scientific paper

We present a consistent calculation of the structure functions within a light-front constituent quark model of the nucleon. Relativistic effects and the relevance of the covariance constraints are analyzed for polarized parton distributions. Various models, which differ in their gluonic structure at the hadronic scale, are investigated. The results of the full covariant calculation are compared with those of a non-relativistic approximation to show the structure and magnitude of the differences. It is also shown how measurements of transversity in doubly polarized Drell-Yan lepton pair production are a clearcut sign of covariance requirements for the spin.

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