Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions

Show full item record



Permalink

http://hdl.handle.net/10138/209968

Citation

Adam , J , Brucken , E J , Chang , B , Kim , D J , Mieskolainen , M M , Orava , R , Rak , J , Räsänen , S S , Saarinen , S , Slupecki , M , Snellman , T W , Trzaska , W H , Vargyas , M , Viinikainen , J & The ALICE Collaboration 2017 , ' Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions ' , Nature Physics , vol. 13 , no. 6 , pp. 535-539 . https://doi.org/10.1038/NPHYS4111

Title: Enhanced production of multi-strange hadrons in high-multiplicity proton-proton collisions
Author: Adam, J.; Brucken, E. J.; Chang, B.; Kim, D. J.; Mieskolainen, M. M.; Orava, R.; Rak, J.; Räsänen, S. S.; Saarinen, S.; Slupecki, M.; Snellman, T. W.; Trzaska, W. H.; Vargyas, M.; Viinikainen, J.; The ALICE collaboration
Contributor: University of Helsinki, Helsinki Institute of Physics
University of Helsinki, University of Jyväskylä
University of Helsinki, University of Jyväskylä
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, University of Jyväskylä
University of Helsinki, Helsinki Institute of Physics
University of Helsinki, University of Jyväskylä
University of Helsinki, University of Jyväskylä
University of Helsinki, University of Jyväskylä
Date: 2017-06
Language: eng
Number of pages: 5
Belongs to series: Nature Physics
ISSN: 1745-2473
URI: http://hdl.handle.net/10138/209968
Abstract: At sufficiently high temperature and energy density, nuclear matter undergoes a transition to a phase in which quarks and gluons are not confined: the quark-gluon plasma (QGP)(1). Such an exotic state of strongly interacting quantum chromodynamics matter is produced in the laboratory in heavy nuclei high-energy collisions, where an enhanced production of strange hadrons is observed(2-6). Strangeness enhancement, originally proposed as a signature of QGP formation in nuclear collisions(7), is more pronounced for multi-strange baryons. Several effects typical of heavy-ion phenomenology have been observed in high-multiplicity proton-proton (pp) collisions(8,9), but the enhanced production of multi-strange particles has not been reported so far. Here we present the first observation of strangeness enhancement in high-multiplicity proton-proton collisions. We find that the integrated yields of strange and multi-strange particles, relative to pions, increases significantly with the event charged-particle multiplicity. The measurements are in remarkable agreement with the p-Pb collision results(10,11), indicating that the phenomenon is related to the final system created in the collision. In high-multiplicity events strangeness production reaches values similar to those observed in Pb-Pb collisions, where a QGP is formed.
Subject: P-PB COLLISIONS
RANGE ANGULAR-CORRELATIONS
HEAVY-ION COLLISIONS
ROOT-S(NN)=5.02 TEV
LONG-RANGE
ENERGY-DEPENDENCE
BARYON PRODUCTION
MID-RAPIDITY
PPB
LHC
114 Physical sciences
Rights:


Files in this item

Total number of downloads: Loading...

Files Size Format View
nphys4111.pdf 646.1Kb PDF View/Open

This item appears in the following Collection(s)

Show full item record