Abstract
In the first three years of LHC operation, ALICE has measured identified light- flavour hadrons in a wide transverse momentum range. The measurements have been performed for the three collision systems: pp at √ s = 0.9, 2.76 and 7 TeV, p-Pb at √ sNN = 5.02 TeV and Pb-Pb at √ sNN = 2.76 TeV. The latest results on transverse momentum distributions, particle ratios and integrated production yields are reported.
Highlights
Strongly-interacting matter under extreme conditions of high temperature and density can be investigated in ultrarelativistic heavy-ion collisions
The transverse momentum spectra for pions, kaons and protons have been measured with ALICE in several colliding systems and energies at the LHC showing the excellent particle identification (PID) capabilities of the experiment
In Pb–Pb, we observe that the proton-topion and the kaon-to-pion ratios both exhibit a peak and that at low pT, the rise of both ratios can be well described by hydrodynamic calculations
Summary
Strongly-interacting matter under extreme conditions of high temperature and density can be investigated in ultrarelativistic heavy-ion collisions. ALICE (A Large Ion Collider Experiment) [1,2,3] is a general-purpose detector for heavy-ion studies at the CERN LHC (Large Hadron Collider). It has unique particle identification (PID) capabilities among the LHC experiments, allowing for measurements of particles in a wide range in pT. The central barrel, located inside a solenoidal magnet (B = 0.5 T), covers the mid-rapidity region |η| < 0.9 over the full azimuthal angle It includes a six-layer high-resolution Inner Tracking System (ITS), a large-volume Time Projection Chamber (TPC), electron and charged-hadron identification detectors which exploit Transition Radiation (TRD) and Time Of Flight (TOF) techniques, respectively. The forward-rapidity system includes a single-arm muon spectrometer covering the pseudorapidity range -4.0 ≤ η ≤ -2.5 and several smaller detectors for triggering, multiplicity measurements and centrality determination
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