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Lévy-stable two-pion Bose-Einstein correlations in s NN =200 GeV Au+Au collisions

Adare, A. ; Aidala, C. ; Ajitanand, N. N. ; Akiba, Y. ; Akimoto, R. ; Alexander, J J ; Christiansen, Peter LU ; Gustafsson, Hans-Åke LU ; Haslum, Eva LU and Oskarsson, Anders LU , et al. (2018) In Physical Review C 97(6).
Abstract
We present a detailed measurement of charged two-pion correlation functions in 0-30% centrality sNN=200 GeV Au+Au collisions by the PHENIX experiment at the Relativistic Heavy Ion Collider. The data are well described by Bose-Einstein correlation functions stemming from Lévy-stable source distributions. Using a fine transverse momentum binning, we extract the correlation strength parameter λ, the Lévy index of stability α, and the Lévy length scale parameter R as a function of average transverse mass of the pair mT. We find that the positively and the negatively charged pion pairs yield consistent results, and their correlation functions are represented, within uncertainties, by the same Lévy-stable source functions. The λ(mT) measurements... (More)
We present a detailed measurement of charged two-pion correlation functions in 0-30% centrality sNN=200 GeV Au+Au collisions by the PHENIX experiment at the Relativistic Heavy Ion Collider. The data are well described by Bose-Einstein correlation functions stemming from Lévy-stable source distributions. Using a fine transverse momentum binning, we extract the correlation strength parameter λ, the Lévy index of stability α, and the Lévy length scale parameter R as a function of average transverse mass of the pair mT. We find that the positively and the negatively charged pion pairs yield consistent results, and their correlation functions are represented, within uncertainties, by the same Lévy-stable source functions. The λ(mT) measurements indicate a decrease of the strength of the correlations at low mT. The Lévy length scale parameter R(mT) decreases with increasing mT, following a hydrodynamically predicted type of scaling behavior. The values of the Lévy index of stability α are found to be significantly lower than the Gaussian case of α=2, but also significantly larger than the conjectured value that may characterize the critical point of a second-order quark-hadron phase transition. © 2018 American Physical Society. (Less)
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author collaboration
organization
publishing date
type
Contribution to journal
publication status
published
subject
in
Physical Review C
volume
97
issue
6
article number
064911
publisher
American Physical Society
external identifiers
  • scopus:85048878274
ISSN
2469-9985
DOI
10.1103/PhysRevC.97.064911
language
English
LU publication?
yes
additional info
Export Date: 5 July 2018
id
fca24c40-7770-4a0d-aa16-deaa63bd653a
alternative location
https://www.scopus.com/inward/record.uri?eid=2-s2.0-85048878274&doi=10.1103%2fPhysRevC.97.064911&partnerID=40&md5=3c81740ad313319df10a41fa98082cf7
date added to LUP
2018-07-06 10:18:29
date last changed
2023-04-08 14:38:44
@article{fca24c40-7770-4a0d-aa16-deaa63bd653a,
  abstract     = {{We present a detailed measurement of charged two-pion correlation functions in 0-30% centrality sNN=200 GeV Au+Au collisions by the PHENIX experiment at the Relativistic Heavy Ion Collider. The data are well described by Bose-Einstein correlation functions stemming from Lévy-stable source distributions. Using a fine transverse momentum binning, we extract the correlation strength parameter λ, the Lévy index of stability α, and the Lévy length scale parameter R as a function of average transverse mass of the pair mT. We find that the positively and the negatively charged pion pairs yield consistent results, and their correlation functions are represented, within uncertainties, by the same Lévy-stable source functions. The λ(mT) measurements indicate a decrease of the strength of the correlations at low mT. The Lévy length scale parameter R(mT) decreases with increasing mT, following a hydrodynamically predicted type of scaling behavior. The values of the Lévy index of stability α are found to be significantly lower than the Gaussian case of α=2, but also significantly larger than the conjectured value that may characterize the critical point of a second-order quark-hadron phase transition. © 2018 American Physical Society.}},
  author       = {{Adare, A. and Aidala, C. and Ajitanand, N. N. and Akiba, Y. and Akimoto, R. and Alexander, J J and Christiansen, Peter and Gustafsson, Hans-Åke and Haslum, Eva and Oskarsson, Anders and Silvermyr, David and Stenlund, Evert}},
  issn         = {{2469-9985}},
  language     = {{eng}},
  number       = {{6}},
  publisher    = {{American Physical Society}},
  series       = {{Physical Review C}},
  title        = {{Lévy-stable two-pion Bose-Einstein correlations in s NN =200 GeV Au+Au collisions}},
  url          = {{http://dx.doi.org/10.1103/PhysRevC.97.064911}},
  doi          = {{10.1103/PhysRevC.97.064911}},
  volume       = {{97}},
  year         = {{2018}},
}