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Are there approximate relations among transverse momentum dependent distribution functions?
Avakian, H Efremov, AV Goeke, K Metz, A Schweitzer, P Teckentrup, T
Avakian, H
Efremov, AV
Goeke, K
Metz, A
Schweitzer, P
Teckentrup, T
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Journal Article
Date
2008-01-24
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10.1103/PhysRevD.77.014023
Abstract
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 h1L(1)a(x) to hLa(x), and discuss how it can be further tested by future CLAS and COMPASS data. © 2008 The American Physical Society.
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Physical Review D - Particles, Fields, Gravitation and Cosmology
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