We have studied the distributions of the yield of primary charged particles produced in the asymmetric $p$ – $P b$ collisions at $\sqrt{s_{N N}} = 5.02 TeV$ for the three pseudorapidity regions: $0.3 < η < 0.8, 0.8 < η < 1.3$ and $1.3 < η < 1.8$ and the transverse momentum range of $0.5 < p_{T} < 100 GeV/c$ . Heavy ion jet interaction generator (HIJING) and Ultra relativistic quantum molecular dynamics (UrQMD) models are used to produce simulated data and the results are compared with the CMS and ATLAS data. The comparison of models and data shows the existence of high $p_{T}$ area with boundary values that depend upon pseudorapidity ( $η$ ). At high $p_{T}$ values, the behavior of the distributions shows some universality, which does not depend upon the models. The reason of the universality could be the string dynamics for the parton hadronization at high $p_{T}$ values.

Keywords:

PACS: 12.38.Mh, 13.85.Ni

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