Twist-3 T-odd fragmentation functions G⊥ and (G)over-tilde⊥ in a spectator

We present a calculation of the twist-3 T-odd chiral-even fragmentation functions G(perpendicular to) and (G) over tilde (perpendicular to) using a spectator model. We consider the effect gluon exchange to calculate all necessary one-loop diagrams for the quark-quark and quark-gluon-quark correlation functions. We find that the gluon loops corrections generate non-zero contribution to these two fragmentation function. We numerically calculate their half-k(T) moments by integrating over the transverse momentum and also verify the equation of motion relation among G(perpendicular to), (G) over tilde (perpendicular to) and the Collins function. (C) 2016 The Author(s). Published by Elsevier B.V.