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Polarized twist-three distributions $g_T$ and $h_L$ and the role of intrinsic transverse momentum

R. D. Tangerman·P. J. Mulders
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Abstract

In a nonstandard way we split up the polarized quark distributions $g_T$ and $h_L$ into their twist-two, quark-mass, and interaction-dependent parts, emphasizing the sensitivity to quark intrinsic transverse momentum. We show how to derive the Burkhardt-Cottingham sum rule in this approach and derive a similar sum rule for the chiral-odd distribution $h_2$. The effect of intrinsic transverse momentum in experimental observables is illustrated in the calculation of the ${\cal O}(1/Q)$ double-spin asymmetry $A_{LT}$ in Drell-Yan scattering.

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R. D. Tangerman, P. J. Mulders. 1994-08-16. Polarized twist-three distributions $g_T$ and $h_L$ and the role of intrinsic transverse momentum. https://arxiv.org/abs/hep-ph/9408305

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