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

Acharya, S ; Adolfsson, Jonatan LU ; Christiansen, Peter LU ; Oskarsson, Anders LU ; Richert, Tuva LU ; Silvermyr, David LU ; Stenlund, Evert LU ; Vislavicius, Vytautas LU and Zou, S. (2019) In European Physical Journal C 79(3).
Abstract
First results on K / π, p / π and K/p fluctuations are obtained with the ALICE detector at the CERN LHC as a function of centrality in Pb--Pb collisions at sNN=2.76TeV. The observable ν 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 / π show a change of sign in ν dyn from positive to negative towards more peripheral collisions.... (More)
First results on K / π, p / π and K/p fluctuations are obtained with the ALICE detector at the CERN LHC as a function of centrality in Pb--Pb collisions at sNN=2.76TeV. The observable ν 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 / π show a change of sign in ν 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 ν dyn exhibits a change in sign for p / π and K/p. © 2019, CERN for the benefit of the ALICE collaboration. (Less)
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author collaboration
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publishing date
type
Contribution to journal
publication status
published
subject
in
European Physical Journal C
volume
79
issue
3
article number
236
publisher
Springer
external identifiers
  • scopus:85062941460
ISSN
1434-6044
DOI
10.1140/epjc/s10052-019-6711-x
language
English
LU publication?
yes
additional info
Export Date: 28 March 2019
id
ca21ca19-5d35-437d-a965-0de128480a18
date added to LUP
2019-03-28 13:05:16
date last changed
2020-10-07 06:22:47
@article{ca21ca19-5d35-437d-a965-0de128480a18,
  abstract     = {First results on K / π, p / π and K/p fluctuations are obtained with the ALICE detector at the CERN LHC as a function of centrality in Pb--Pb collisions at sNN=2.76TeV. The observable ν 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 / π show a change of sign in ν 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 ν dyn exhibits a change in sign for p / π and K/p. © 2019, CERN for the benefit of the ALICE collaboration.},
  author       = {Acharya, S and Adolfsson, Jonatan and Christiansen, Peter and Oskarsson, Anders and Richert, Tuva and Silvermyr, David and Stenlund, Evert and Vislavicius, Vytautas and Zou, S.},
  issn         = {1434-6044},
  language     = {eng},
  number       = {3},
  publisher    = {Springer},
  series       = {European Physical Journal C},
  title        = {Relative particle yield fluctuations in Pb--Pb collisions at √sNN=2.76TeV},
  url          = {http://dx.doi.org/10.1140/epjc/s10052-019-6711-x},
  doi          = {10.1140/epjc/s10052-019-6711-x},
  volume       = {79},
  year         = {2019},
}