Predictions for p+Pb at 5.02A TeV to test initial state nuclear shadowing at the Large Hadron Collider

TL;DR

This paper compares pQCD model predictions for p+Pb collisions at 5.02A TeV to test initial state nuclear shadowing effects at the LHC, using updated calculations of nuclear modification factors and pseudorapidity asymmetries.

Contribution

It provides updated pQCD-based predictions for nuclear shadowing effects in p+Pb collisions at LHC energies, incorporating generalized parton distribution functions.

Findings

Predicted nuclear modification factors and pseudorapidity asymmetries at 5.02A TeV.

Comparison of HIJING/B extasciitilde B v2.0 and kTpQCD extunderscore v2.0 models.

Updated results from previous 2012 calculations.

Abstract

Collinear factorized perturbative quantum chromodynamics (pQCD) model predictions are compared for $p+{\rm Pb}$ at 5.02$A$ TeV to test nuclear shadowing of parton distribution at the Large Hadron Collider (LHC). The pseudorapidity distribution the nuclear modification factor (NMF), $R_{p{\rm Pb}}(y=0,p_T<20\;{\rm GeV}/{\it c}) = dn_{p{\rm Pb}} /(N_{\rm coll}(b)dn_{pp})$ and the pseudorapidity asymmetry $Y_{asym}^{h}(p_T)=R^h_{pPb}(p_T, \eta<0)/R^h_{pPb}(p_T,\eta>0)$ are computed using {\small HIJING/B\=B v2.0 model} and a pQCD improved parton model kTpQCD\_v2.0 which embedded generalized parton distribution functions (PDFs). These results are updated calculations of those presented in Phys. Rev. C {\bf 85}, 024903 (2012).