Relative particle yield fluctuations in Pb-Pb collisions at root s(NN)=2.76 TeV
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and Zinovjev, G. and Zmeskal, J. and Zou, S. and ALICE Collaboration... Show more Show less
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Abstract
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,
caalled 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)... Show more Show less