  A new approach to nonperturbative QCD, holographic light-front QCD, provides
a comprehensive model for hadron dynamics and spectroscopy, incorporating color
confinement, a universal hadron mass scale, the prediction of a massless pion
in the chiral limit, and connections between the spectroscopy of mesons,
baryons and tetraquarks across the full hadron spectrum. In this article we
present predictions for the Sivers asymmetry and related transverse momentum
distributions for the proton based on the light-front wavefunctions of the
baryon eigenstate predicted by holographic QCD.
