1 Ocak 2014 Dergi makalesi Açık Erişim

CERN İşbirliği

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    "description": "<p>In high-energy collisions, the spatio-temporal size of the particle production region can be measured using the Bose\u2013Einstein correlations of identical bosons at low relative momentum. The source radii are typically extracted using two-pion correlations, and characterize the system at the last stage of interaction, called kinetic freeze-out. In low-multiplicity collisions, unlike in high-multiplicity collisions, two-pion correlations are substantially altered by background correlations, e.g. mini-jets. Such correlations can be suppressed using three-pion cumulant correlations. We present the first measurements of the size of the system at freeze-out extracted from three-pion cumulant correlations in pp, p\u2013Pb and Pb\u2013Pb collisions at the LHC with ALICE. At similar multiplicity, the invariant radii extracted in p\u2013Pb collisions are found to be 5\u201315% larger than those in pp, while those in Pb\u2013Pb are 35\u201355% larger than those in p\u2013Pb. Our measurements disfavor models which incorporate substantially stronger collective expansion in p\u2013Pb as compared to pp collisions at similar multiplicity.</p>", 
    "doi": "10.1016/j.physletb.2014.10.034", 
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    "journal": {
      "title": "Physics Letters B"
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    "publication_date": "2014-01-01", 
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    "title": "Freeze-out radii extracted from three-pion cumulants in pp, p\u2013Pb and Pb\u2013Pb collisions at the LHC"
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