1 Ocak 2014 Dergi makalesi Açık Erişim

CERN İşbirliği

Citation Style Language JSON

{
  "DOI": "10.1016/j.physletb.2014.10.034", 
  "abstract": "<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>", 
  "author": [
    {
      "family": "CERN \u0130\u015fbirli\u011fi"
    }
  ], 
  "container_title": "Physics Letters B", 
  "id": "108563", 
  "issued": {
    "date-parts": [
      [
        2014, 
        1, 
        1
      ]
    ]
  }, 
  "title": "Freeze-out radii extracted from three-pion cumulants in pp, p\u2013Pb and Pb\u2013Pb collisions at the LHC", 
  "type": "article-journal"
}