Spectra of identified hadrons with the ALICE detector in pp and Pb-Pb collisions at the LHC
Abstract
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
s
NN
−
−
−
−
√
= 2.76 TeV. Transverse momentum spectra of
π
±
, K
±
, p,
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
s
NN
−
−
−
−
√
= 200 GeV and predictions for the LHC.