Are there approximate relations among transverse momentum dependent distribution functions?

Details Are there approximate relations among transverse momentum dependent distribution functions? Are there approximate relations among transverse momentum dependent distribution functions?

2007-09-20

arxiv.org/abs/0709.3253v1

Phys.Rev.D77:014023,2008

Physics

High Energy Physics

High Energy Physics - Phenomenology

9 pages, 3 figures

Scientific paper

10.1103/PhysRevD.77.014023

Certain exact relations among transverse momentum dependent parton distribution functions due to QCD equations of motion turn into approximate ones upon the neglect of pure twist-3 terms. On the basis of available data from HERMES we test the practical usefulness of one such ``Wandzura-Wilczek-type approximation'', namely of that connecting h_{1L}^{\perp(1)a}(x) to h_L^a(x), and discuss how it can be further tested by future CLAS and COMPASS data.

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