Volume 311 - Critical Point and Onset of Deconfinement (CPOD2017) - Parallel Session I
Recent results on Bose-Einstein correlations by the PHENIX Experiment
V.S. Greene* and  On behalf of the PHENIX collaboration
Full text: pdf
Pre-published on: January 16, 2018
Published on: January 22, 2018
Abstract
We present the measurement of charged pion two-particle correlation functions in
$\sqrt{s_{NN}}=$ 39, 62 and 200 GeV Au+Au collisions. The measured correlation functions for all
collision energies, centralities and average transverse masses can be statistically well
described by Bose-Einstein correlation functions from Levy-shaped source distributions.
We extract the correlation strength parameter $\lambda$, Levy index $\alpha$ and Levy scale parameter $R$ as
functions of average pair transverse mass. We observe that the Levy index $\alpha$ differs from the
Gaussian case of $\alpha=2$ and also from the conjectured value at the critical point. The correlation
strength $\lambda$ shows a decrease for small transverse masses, which may be in conjunction with
an increased number of decay pions in the given kinematic domain. The Levy scale $R$ shows a hydrodynamic
type of scaling behavior. Furthermore, the appearance of a new scaling variable $\widehat{R}$ is observed.
DOI: https://doi.org/10.22323/1.311.0053
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