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

Abstract

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.

arXiv comment5 pages, Latex, figures included (uses feynman.tex), talk presented by R.D. Tangerman at 2nd Meeting on Possible Measurements of Singly Polarized pp and pn Collisions at HERA (DESY-IfH Zeuthen, Aug 31- Sep 2, 1995)

References in corpus (1)

• On the Possible Violation of Sum Rules for Higher-Twist Parton Distributions

Cited by in corpus (1)

• Measurement of Singly Polarized p + N(pol) Collisions at HERA