Speaker
Dr
Francesco Barile
(Universita degli Studi di Bari-Universita e INFN)
Description
The ALICE experiment, dedicated to the study of heavy-ion collisions at LHC energies, features a high-quality particle identification system, based on the the Inner Tracking System (ITS), the Time-Projection-Chamber (TPC), the Time-of-Flight (TOF) and the HMPID. The ALICE-HMPID (High Momentum Particle Identification detector) has been designed to identify charged pions and kaons in the range 1< p <3 GeV/c and protons in the range 2< p<5 GeV/c, in a reduced region of the phase space. It consists of seven identical proximity focusing RICH (Ring Imaging Cherenkov) counters, with a total active area of 11 m2, which exploit the technology of large area MWPCs
equipped with Cesium Iodide (CsI) photo-cathodes for imaging the Cherenkov light emitted by a liquid C6F14 radiator. Since November 2009 ALICE is collecting p-p and Pb-Pb collisions data at
LHC. A study of the particle identification efficiency of the HMPID has been carried out with samples of protons and pions coming from reconstructed V0 (Λ/anti-Λ, K0S) decays in p-p collisions at √s = 7 TeV.
Primary author
Dr
Francesco Barile
(Universita degli Studi di Bari-Universita e INFN)
