Identified particles in pPb collisions at (~sNN)/(1/2) = 5.02 TeV measured with the CMS detector

摘要

Spectra of identified charged hadrons in pPb collisions measured with the CMS detector at the LHC at (~sNN)/(1/2) = 5.02 TeV are presented. Charged pions, kaons, and protons in the transverse-momentum range PT ≈ 0.1-1.7 GeV/c and laboratory rapidity |y| < 1 are identified via their energy loss in the silicon tracker. The average pT increases with particle mass and the charged multiplicity of the event. The increase of the average pt with charged multiplicity is greater for heavier hadrons. Comparisons with Monte Carlo event generators reveal that EPOS LHC, which incorporates additional hydrodynamic evolution of the created system, is able to reproduce most of the data features, unlike HIJING and AMPT. The average transverse momentum and particle ratio measurements indicate that characteristics of particle production at LHC energies are strongly correlated with event particle multiplicity.