Relative particle yield fluctuations in Pb-Pb collisions at √sNN=2.76 TeV

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초록

First results on K/pi, pi/pi and K/p fluctuations are obtained with the ALICE detector at the CERN LHC as a function of centrality in Pb-Pb collisions at v root s(NN) = 2.76 TeV. The observable nu(dyn), which is defined in terms of the moments of particle multiplicity distributions, is used to quantify the magnitude of dynamical fluctuations of relative particle yields and also provides insight into the correlation between particle pairs. This study is based on a novel experimental technique, called the Identity Method, which allows one to measure the moments of multiplicity distributions in case of incomplete particle identification. The results for p/pi show a change of sign in.dyn from positive to negative towards more peripheral collisions. For central collisions, the results follow the smooth trend of the data at lower energies and.dyn exhibits a change in sign for p/pi and K/p. nu(dyn)

키워드

PARTON
제목
Relative particle yield fluctuations in Pb-Pb collisions at √sNN=2.76 TeV
저자
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DOI
10.1140/epjc/s10052-019-6711-x
발행일
2019-03-14
유형
Article
저널명
European Physical Journal C
79
3