Event-by-event fluctuations of the kaon-to-pion ratio in central Pb plus Pb collisions at 158 GeV per nucleon

Citation
Sv. Afanasiev et al., Event-by-event fluctuations of the kaon-to-pion ratio in central Pb plus Pb collisions at 158 GeV per nucleon, PHYS REV L, 86(10), 2001, pp. 1965-1969
Citations number
16
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Physics
Journal title
PHYSICAL REVIEW LETTERS
ISSN journal
0031-9007 → ACNP
Volume
86
Issue
10
Year of publication
2001
Pages
1965 - 1969
Database
ISI
SICI code
0031-9007(20010305)86:10<1965:EFOTKR>2.0.ZU;2-R
Abstract
We present the first measurement of fluctuations from event to event in the production of strange particles in collisions of heavy nuclei. The ratio o f charged kaons to charged pions is determined for individual central Pb Pb collisions. After accounting for the fluctuations due to detector resolu tion and finite number statistics we derive ant upper limit on genuine nons tatistical fluctuations, which could be related to a first- or second-order QCD phase transition. Such fluctuations Lire shown to be very small.