Abstract
ALICE is a dedicated heavy ion experiment that also collects and analyzes p-Pb and pp collisions. These data are important to provide a reference to the Pb-Pb data, tune MC generators based on the QCD inspired models and complement the results from the other LHC experiments. In this contribution a summary of the most recent results on light flavour identified hadron production in pp collisions is presented.
Highlights
The main feature that makes ALICE [1] unique among the LHC experiments is its excellent Particle IDentification (PID) performance both in the central barrel (|η| < 0.9) and in the forward region (−4.0 < η < −2.5)
The low material budget in the central barrel together with the low magnetic field allow for PID down to very low transverse momentum, using several different specialized detectors and PID techniques in complementary pT ranges
To illustrate the ALICE PID capabilities, in Fig.√1 the pT spectra of π, K, p produced in pp collisions at s = 7 TeV and identified by ITS, TPC, TOF and HMPID are shown
Summary
The main feature that makes ALICE [1] unique among the LHC experiments is its excellent Particle IDentification (PID) performance both in the central barrel (|η| < 0.9) and in the forward region (−4.0 < η < −2.5). The low material budget in the central barrel together with the low magnetic field allow for PID down to very low transverse momentum (pT ∼ 0.1 GeV/c), using several different specialized detectors and PID techniques in complementary pT ranges. These detectors are the ITS and the TPC that identify particles through their energy loss, the TRD that uses the transition radiation, the TOF that uses the time taken by the particles to fly from the primary vertex to the TOF layer and three limited acceptance detectors: the HMPID (based on Cherenkov radiation) and the electromagnetic calorimeters, EMCal and PHOS. For this reason a detailed comparison with the models will be shown
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