We study the three-gluon correlation function contribution to the Sivers asymmetry in semiinclusive deep inelastic scattering. We first establish the matching between the usual twist-3 collinear factorization approach and transverse momentum dependent factorization formalism for the moderate transverse momentum region. We then derive the so-called coefficient functions used in the usual TMD evolution formalism. Finally we perform the next-to-leading order calculation for the transverse-momentum-weighted spin-dependent differential cross section, from which we identify the QCD collinear evolution of the twist-3 Qiu-Sterman function: the offdiagonal contribution from the three-gluon correlation functions.
|Original language||English (US)|
|Journal||Proceedings of Science|
|State||Published - 2015|
|Event||23rd International Workshop on Deep-Inelastic Scattering, DIS 2015 - Dallas, United States|
Duration: Apr 27 2015 → May 1 2015
All Science Journal Classification (ASJC) codes