2012/03/27 by Roberto Preghenella, Preghenella, Roberto
Physics and Astronomy · #FOS: Physical sciences #High Energy Physics - Experiment (hep-ex) #Nuclear Experiment (nucl-ex) #hep-ex #nucl-ex
paper · pdf · doi:10.48550/arxiv.1203.5904
8 pages, 9 figures, presented at the first ECTP International Conference on "Primordial QCD matter in LHC era: implications of QCD results on the early Universe", Cairo, Egypt, December 4-8, 2011
arxiv created 2012/03/27 · arxiv updated 2012/03/28
The measurement of identified charged-hadron production at mid-rapidity (|y| < 0.5) performed with the ALICE experiment at the LHC is presented for pp collisions at √(s) = 900 GeV and 7 TeV and for Pb--Pb collisions at √sNN = 2.76 TeV. Transverse momentum spectra of π±, K±, p, \rm p and multi-strange baryons are measured over a wide momentum range using the dE/dx, the time-of-flight and topological particle-identification techniques. In this report, the particle-identification detectors and techniques, as well as the achieved performance, are shortly reviewed. Proton-proton results on particle production yields, spectral shapes and particle ratios are presented as a function of the collision energy and compared to previous experiments and commonly-used Monte Carlo models. Particle spectra, yields and ratios in Pb--Pb are measured as a function of the collision centrality and the results are compared with published RHIC data in Au--Au collisions at √sNN = 200 GeV and predictions for the LHC.