  The boost invariant longitudinal position space variable $\sigma$, the
Fourier conjugate to skewness $\xi$, unravels the longitudinal impact parameter
information in a proton. Here, we investigate skewness sensitivity of T-odd
leading twist GTMDs considering a momentum transfer to longitudinal as well as
transverse direction and present a detailed study of the spin-transverse
momentum correlation through Sivers and Boer-Mulders Wigner Distributions in
boost invariant longitudinal position space. The $\sigma$-space distributions
of T-odd sector show oscillatory patterns sensitive to square of the total
momentum transfer $-t$, analogous to the diffraction scattering of wave in
Optics. An additional effect on the diffraction pattern is reported caused by
interference between transverse momentum transfer $\bfd$ to the transverse
momentum $\bfp$ of quarks.
