Speaker: Feng Yuan (Lawrence Berkeley National Laboratory )

Title: Toward the QCD Theory for Single Transverse Spin Asymmetry

Abstract: 
Single transverse spin asymmetry is a novel hadronic phenomena, and
is defined as the spin asymmetry when we flip the transverse spin of one of the
hadrons involved in the process. There has been great progress in recent years
from both experiment and theory sides, in exploring the underlying physics
for this phenomena. In this talk, I will review recent theoretical developments, focusing
on the associated QCD dynamics, such as the QCD factorization in terms of transverse
momentum dependent parton distributions and fragmentations, the universality for these
functions, and our recent results on the next-to-leading order perturbative QCD
corrections.