Abstract
We present the current theory status on the particle production in the forward region in proton-nucleus (p+A) collisions based on the Color Glass Condensate framework. The cross-section expressed in a factorized form with the dipole amplitude which is related to the unintegrated gluon distribution. Energy dependence of the dipole amplitude is controlled by the nonlinear x-evolution equation and constrained by e+p scattering data at HERA. The transverse geometry of the target is modeled as an assembly of the nucleons distributed with the Woods-Saxon profile. We show our prediction for the nuclear modification factor of the hadron multiplicity in p+A reactions at the LHC energy.
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