  We extend the study of quark spin-orbit correlations in the nucleon to the
case of transverse polarization. At the leading-twist level, this completes the
spin structure of the quark kinetic energy-momentum tensor. In particular, we
revisit the transversity decomposition of angular momentum proposed a decade
ago by Burkardt and introduce a new transverse correlation, namely between
quark transversity and orbital angular momentum. We also provide for the first
time the Wandzura-Wilczek expression for the second Mellin moment of twist-3
transversity generalized parton distributions, along with a new sum rule. Based
on lattice calculation results, we conclude that the quark transverse
spin-orbit correlation is negative for both up and down flavors, just like in
the longitudinal case.
