  We compute sea quark Sivers distribution within color glass condensate(CGC)
framework. It has been found that up to the leading logarithm accuracy, the
collinear twist-3 approach and the CGC calculation yield the same result for
sea quark Sivers distribution in the dilute limit. We further verify that
transverse momentum dependent factorization is consistent with CGC treatment at
small $x$ for the case of transverse spin asymmetry in open charm quark
production in semi-inclusive deeply inelastic scattering process in an overlap
kinematical region.
