Abstract
The ALICE experiment is a dedicated heavy-ion physics detector at the LHC, with unique capabilities for the study of identified particle production. In this paper, an overview of ALICE results on the measurement of pion, kaon and proton transverse momentum (pT) spectra at mid-rapidity in proton-proton and Pb-Pb collisions at different energies is presented. The particle identification is performed using the following detectors: the Time Projection Chamber (TPC), the Inner Tracking System (ITS), the Time of Flight system (TOF) and a Ring-imaging Cherenkov system (HMPID).
Highlights
The ALICE detector [1, 2, 3] features multiple particle identification systems including: the Time Projection Chamber (TPC), the Inner Tracking System (ITS), the Time of Flight system (TOF) and a Ring-imaging Cherenkov detector (HMPID). This combination of detectors, along with the excellent tracking capabilities of ALICE, provides the opportunity to measure the production of pions, kaons and protons over a broad transverse momentum range, from 100 MeV/c up to 20 GeV/c
The TOF velocity measurement contributes to the identification for the proton transverse momentum (pT) range between 0.5 GeV/c and 3-5 GeV/c
Both ratios are consistent for two energies
Summary
The ALICE detector [1, 2, 3] features multiple particle identification systems including: the Time Projection Chamber (TPC), the Inner Tracking System (ITS), the Time of Flight system (TOF) and a Ring-imaging Cherenkov detector (HMPID). This combination of detectors, along with the excellent tracking capabilities of ALICE, provides the opportunity to measure the production of pions, kaons and protons over a broad transverse momentum (pT) range, from 100 MeV/c up to 20 GeV/c. At high pT (up to 20 GeV/c), particles are identified using the HMPID or the relativistic rise of the energy loss distribution in the TPC. For all of those systems, the ALICE collaboration has measured pion, kaon and proton production as a function of pT at mid-rapidity.
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