  We perform a detailed comparison of long range rapidity correlations in the
Color Glass Condensate framework to high multiplicity di-hadron data in
proton-proton and proton-lead collisions from the CMS, ALICE and ATLAS
experiments at the LHC. The overall good agreement thus far of the non-trivial
systematics of theory with data is strongly suggestive of gluon saturation and
the presence of subtle quantum interference effects between rapidity separated
gluons. In particular, the yield of pairs collimated in their relative
azimuthal angle $\Delta\phi\sim 0$, is sensitive to the shape of unintegrated
gluon distributions in the hadrons that are renormalization group evolved in
rapidity from the beam rapidities to those of the measured hadrons. We present
estimates for the collimated di-hadron yield expected in central deuteron-gold
collisions at RHIC.
