The transverse momentum (pT ) distribution of primary charged particles is measured in minimum bias p (non-single-diffractive) p þ Pb collisions at √s(NN)= 5.02 TeV with the ALICE detector at the LHC. The pT spectra measured near central rapidity in the range 0.5 < pT < 20 GeV/c exhibit a weak pseudo- rapidity dependence. The nuclear modification factor RpPb is consistent with unity for pT above 2 GeV/c. This measurement indicates that the strong suppression of hadron production at high pT observed in Pb þ Pb collisions at the LHC is not due to an initial-state effect. The measurement is compared to theoretical calculations.
Transverse Momentum Distribution and Nuclear Modification Factor of Charged Particles in p+Pb Collisions at √s(NN)=5.02 TeV
DE CARO, ANNALISA;DE GRUTTOLA, DANIELE;DE PASQUALE, Salvatore;FUSCO GIRARD, Mario;PAGANO, PAOLA;VIRGILI, Tiziano;
2013-01-01
Abstract
The transverse momentum (pT ) distribution of primary charged particles is measured in minimum bias p (non-single-diffractive) p þ Pb collisions at √s(NN)= 5.02 TeV with the ALICE detector at the LHC. The pT spectra measured near central rapidity in the range 0.5 < pT < 20 GeV/c exhibit a weak pseudo- rapidity dependence. The nuclear modification factor RpPb is consistent with unity for pT above 2 GeV/c. This measurement indicates that the strong suppression of hadron production at high pT observed in Pb þ Pb collisions at the LHC is not due to an initial-state effect. The measurement is compared to theoretical calculations.File in questo prodotto:
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