Probing Relativistic Spin Effects in the Nucleon by Means of Drell-Yan Processes

Details Probing Relativistic Spin Effects in the Nucleon by Means of Drell-Yan Processes Probing Relativistic Spin Effects in the Nucleon by Means of Drell-Yan Processes

1999-02-15

arxiv.org/abs/hep-ph/9902345v2

Phys.Rev. D62 (2000) 094018

Physics

High Energy Physics

High Energy Physics - Phenomenology

15 pages, 5 figures. Expanded version: additional results, analysis of expected experimental errorbars and kinematics of HERA-

Scientific paper

10.1103/PhysRevD.62.094018

Significant differences between transverse and longitudinal polarized parton distributions are found at low energies within a light-front covariant quark model of the nucleon. These differences are due to relativistic spin effects introduced by the Melosh rotations and survive evolution to higher $Q^2$ scales. A specific observable related to double-spin asymmetries in lepton pair production in polarized hadron-hadron collisions is defined. The possibility of assessing the relevance of these relativistic spin effects in future experiments at RHIC and HERA--$\vec{N}$ is discussed.

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