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

Abelev, B.; Adam, J.; Adamová, Dagmar; Bielčík, J.; Bielčíková, Jana; Broz, 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

doi:https://dx.doi.org/10.1016/j.physletb.2014.10.034

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

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SYSNO ASEP	0439719
Document Type	J - Journal Article
R&D Document Type	Journal Article
Subsidiary J	Článek ve WOS
Title	Freeze-out radii extracted from three-pion cumulants in pp, p-Pb and Pb-Pb collisions at the LHC
Author(s)	Abelev, B. (US) Adam, J. (CZ) Adamová, Dagmar (UJF-V)_{RID, ORCID, SAI} Bielčík, J. (CZ) Bielčíková, Jana (UJF-V)_{RID, ORCID, SAI} Broz, M. (CZ) Čepila, J. (CZ) Ferencei, Jozef (UJF-V)_RID Hladký, Jan (FZU-D)_{RID, ORCID, SAI} Křelina, M. (CZ) Křížek, Filip (UJF-V)_{RID, ORCID, SAI} Kučera, Vít (UJF-V)_RID Kushpil, Svetlana (UJF-V)_{RID, ORCID, SAI} Mareš, Jiří A. (FZU-D)_{RID, ORCID} Pachr, M. (CZ) Petráček, V. (CZ) Petráň, M. (CZ) Schulc, M. (CZ) Špaček, M. (CZ) Šumbera, Michal (UJF-V)_{RID, ORCID, SAI} Vajzer, Michal (UJF-V)_RID Wagner, V. (CZ) Zach, Č. (CZ) Závada, Petr (FZU-D)_{RID, ORCID}
Number of authors	941
Source Title	Physics Letters. B. - : Elsevier - ISSN 0370-2693 Roč. 739, DEC (2014), s. 139-151
Number of pages	13 s.
Publication form	Print - P
Language	eng - English
Country	NL - Netherlands
Keywords	ALICE ; heavy ion generators ; Bose-Einstein correlations
Subject RIV	BG - Nuclear, Atomic and Molecular Physics, Colliders
Subject RIV - cooperation	Institute of Physics - Elementary Particles and High Energy Physics
R&D Projects	LG13031 GA MŠMT - Ministry of Education, Youth and Sports (MEYS)
Institutional support	FZU-D - RVO:68378271 ; UJF-V - RVO:61389005
UT WOS	000346002000023
EID SCOPUS	84908689756
DOI	10.1016/j.physletb.2014.10.034
Annotation	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.
Workplace	Nuclear Physics Institute
Contact	Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228
Year of Publishing	2015

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