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

Chatrchyan, S. and Khachatryan, V. and Sirunyan, A. M. and Tumasyan, A. and Adam, W. and Bergauer, T. and Dragicevic, M. and Ero, J. and Fabjan, C. and Friedl, M. and Fruhwirth, R. and Ghete, V. M. and Hormann, N. and Hrubec, J. and Jeitler, M. and Kiesenhofer, W. and Knunz, V. and Krammer, M. and Kratschmer, I. and Liko, D. and Mikulec, I. and Rabady, D. and Rahbaran, B. and Rohringer, C. and Rohringer, H. and Schofbeck, R. and Strauss, J. and Taurok, A. and Treberer-Treberspurg, W. and Waltenberger, W. and Bencze, György and Hajdu, Csaba and Hidas, Pál and Horváth, Dezső and Siklér, Ferenc and Veszprémi, Viktor and Vesztergombi, György and Zsigmond, Anna Júlia and Molnár, József and Pálinkás, József and Karancsi, János and Ujvári, Balázs and Veres, Gábor (2014) Study of the production of charged pions, kaons, and protons in pPb collisions at √sNN = 5.02 TeV. EUROPEAN PHYSICAL JOURNAL C, 74 (6). ISSN 1434-6044

Preview

Text 1307.3442.pdf Available under License Creative Commons Attribution. Download (1MB) | Preview

Abstract

Spectra of identified charged hadrons are measured 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 mo- mentum and particle ratio measurements indicate that particle production at LHC energies is strongly correlated with event particle multiplicity.

Actions (login required)

Edit Item