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    by F. Antinori (INFN)

    → Europe/Zurich
    500/1-001 - Main Auditorium (CERN)

    500/1-001 - Main Auditorium

    CERN

    400
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    Description
    Colliding two heavy nuclei at ultrarelativistic energies allows to create in the laboratory a bulk system with huge density, pressure and temperature and to study its properties. It is estimated that in Pb-Pb collisions at CERN-SPS we reach over an appreciable volume an energy density which exceeds by more than a factor 20 that of normal nuclear matter. At such densities, the hadrons are so closely packed that they interpenetrate; novel physics phenomena are expected to appear. QCD predicts that under such conditions a phase transition from a system composed of colourless hadrons to a Quark-Gluon Plasma (QGP) should occur. A rich ultrarelativistic heavy-ion physics programme is under way both at BNL-AGS and at CERN-SPS since 1986. The results obtained so far have led CERN to officially announce “evidence for a new state of matter” last year. A long-range programme of heavy-ion physics at higher energies is under way (BNL-RHIC) and in preparation (CERN-LHC). These lectures are meant as an introduction to the physics of Ultrarelativistic Heavy-Ion Collisions, from an experimentalist’s viewpoint. Theoretical issues will be dealt with in an “intuitive” manner. Due to the available time, only a selection of experimental results, mostly from the CERN HI programme, will be discussed.
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