Study of the production of charged pions, kaons, and protons in pPb collisions at √sNN = 5.02TeV

Authors

S. Chatrchyan, Yerevan Physics Institute, Armenia
, The CMS collaborationFollow
Ekaterina Avdeeva, University of Nebraska-LincolnFollow
Kenneth A. Bloom, University of Nebraska - LincolnFollow
S. Bose, University of Nebraska - LincolnFollow
Daniel R. Claes, University of Nebraska-LincolnFollow
Aaron Dominguez, University of Nebraska-LincolnFollow
M. Eads, University of Nebraska-Lincoln, Lincoln,Follow
Rebeca Gonzalez Suarez, University of Nebraska-LincolnFollow
J. Keller, University of Nebraska-LincolnFollow
Ilya Kravchenko, University of Nebraska-LincolnFollow
Jose Lazo-Flores, University of Nebraska-LincolnFollow
Sudhir Malik, University of Nebraska - LincolnFollow
F. Meier, University of Nebraska-LincolnFollow
Gregory Snow, University of Nebraska - LincolnFollow
CMS Collaboration, CMS Collaboration

Date of this Version

2014

Citation

Eur. Phys. J. C (2014) 74:2847

Comments

Published by SCOAP3 under Creative Commons License

Abstract

Spectra of identified charged hadrons are meas√ ured in pPb collisions with the CMS detector at the LHC at ^sNN = 5.02 TeV. 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 to 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 pT spectra and integrated yields are also compared to those measured in pp and PbPb collisions at various energies. The average transverse momentum and particle ratio measurements indicate that particle production at LHC energies is strongly correlated with event particle multiplicity.