Počet záznamů: 1  

Freeze-out radii extracted from three-pion cumulants in pp, p-Pb and Pb-Pb collisions at the LHC

  1. 1.
    0439719 - ÚJF 2015 RIV NL eng J - Článek v odborném periodiku
    Abelev, B. - Adam, J. - Adamová, Dagmar - Bielčík, J. - Bielčíková, Jana - Brož, M. - Čepila, J. - Ferencei, Jozef - Hladký, Jan - Křelina, M. - Křížek, Filip - Kučera, Vít - Kushpil, Svetlana - Mareš, Jiří A. - Pachr, M. - Petráček, V. - Petráň, M. - Schulc, M. - Špaček, M. - Šumbera, Michal - Vajzer, Michal - Wagner, V. - Zach, Č. - Závada, Petr
    Freeze-out radii extracted from three-pion cumulants in pp, p-Pb and Pb-Pb collisions at the LHC.
    Physics Letters. B. Roč. 739, DEC (2014), s. 139-151. ISSN 0370-2693
    Grant CEP: GA MŠk(CZ) LG13031
    Institucionální podpora: RVO:68378271 ; RVO:61389005
    Klíčová slova: ALICE * heavy ion generators * Bose-Einstein correlations
    Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače; BF - Elementární částice a fyzika vys. energií (FZU-D)
    Impakt faktor: 6.131, rok: 2014

    In high-energy collisions, the spatio-temporal size of the particle production region can be measured using the Bose-Einstein 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-Pb and Pb-Pb collisions at the LHC with ALICE. At similar multiplicity, the invariant radii extracted in p-Pb collisions are found to be 5-15% larger than those in pp, while those in Pb-Pb are 35-55% larger than those in p-Pb. Our measurements disfavor models which incorporate substantially stronger collective expansion in p-Pb as compared to pp collisions at similar multiplicity.
    Trvalý link: http://hdl.handle.net/11104/0242940