The transverse momentum (pT ) distribution of primary charged particles is measured in minimum bias (non-single-diffractive) p þ Pb collisions at sNN 1⁄4 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 sqrt[s_{NN}]=5.02 TeV
BEOLE', Stefania;BERZANO, DARIO CARLO DOMENICO;L. Bianchi;BOTTA, Elena;BRUNA, ELENA;BUFALINO, STEFANIA;CORRALES MORALES, YASSER;FERRETTI, Alessandro;GAGLIARDI, Martino;GALLIO, Mauro;INNOCENTI, GIAN MICHELE;MARCHISONE, MASSIMILIANO;MASERA, Massimo;MILANO, LEONARDO;OPPEDISANO, Chiara;RAMELLO, Luciano;RUSSO, RICCARDO;SCOMPARIN, ENRICO;SITTA, Mario;VALLERO, Sara;VERCELLIN, Ermanno;
2013-01-01
Abstract
The transverse momentum (pT ) distribution of primary charged particles is measured in minimum bias (non-single-diffractive) p þ Pb collisions at sNN 1⁄4 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 | Dimensione | Formato | |
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