Pion Interferometry for Hydrodynamical Expanding Source with a Finite Baryon Density

W. N. Zhang (1 , 2) , M. J. Efaaf (1) , Cheuk-Yin Wong (2 , 3) , M. Khaliliasr (1) ((1) Harbin Institute of Technology , Harbin , P.R.China

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(2) Oak Ridge National Laboratory Oak Ridge U.S.A. (3) University of Tennessee Knoxville U.S.A.)

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classification ⚛️ nucl-th hep-ph

keywords radiussourcebaryondensityexpandingextractedfiniteinterferometry

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We calculate the two-pion correlation function for an expanding hadron source with a finite baryon density. The space-time evolution of the source is described by relativistic hydrodynamics and the Hanbury-Brown-Twiss (HBT) radius is extracted after effects of collective expansion and multiple scattering on the HBT interferometry have been taken into account, using quantum probability amplitudes in a path-integral formalism. We find that this radius is substantially smaller than the HBT radius extracted from the freeze-out configuration.

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Pion Interferometry for Hydrodynamical Expanding Source with a Finite Baryon Density

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