Twist-three distributions and their appearance in the doubly-polarized Drell-Yan process

Details Twist-three distributions and their appearance in the doubly-polarized Drell-Yan process Twist-three distributions and their appearance in the doubly-polarized Drell-Yan process

1995-10-30

arxiv.org/abs/hep-ph/9510446v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

5 pages, Latex, figures included (uses feynman.tex), talk presented by R.D. Tangerman at 2nd Meeting on Possible Measurements

Scientific paper

The twist-three distributions $g_2(x)$ and $h_2(x)$ are defined as quark-field matrix elements between polarized hadron states. They can be written in terms of quark-mass and gluonic operators, after which the Burkhardt-Cottingham sum rule for $g_2$ can be derived and a similar sum rule for $h_2$. Their role in the Drell-Yan double-spin asymmetry $A_{LT}$ is explained.

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