  Within the Color Glass Condensate (CGC) effective field theory, considering
the violation of boost invariance of the rapidity distribution, we correct the
normalization scheme of the longitudinal rapidity ridge correlations. After
this correction, the large-rapidity ridge correlation rebounds after bottoming,
consistent with the observed data from the CMS detector. It is also found that
the correlation rebound appears around the sum of the saturation momentum of
the projectile and target, and moves to larger rapidities at higher collision
energies. These features directly result from the saturation and the quantum
evolution of gluons within the framework of the CGC.
