Two-pion interferometry for viscous hydrodynamic sources

Abstract

The space-time evolution of the (1+1)-dimensional viscous hydrodynamics with an initial quark-gluon plasma (QGP) produced in ultrarelativistic heavy ion collisions is studied numerically. The particle-emitting sources undergo a crossover transition from the QGP to hadronic gas. We take into account a usual shear viscosity for the strongly coupled QGP as well as the bulk viscosity which increases significantly in the crossover region. The two-pion Hanbury-Brown-Twiss (HBT) interferometry for the viscous hydrodynamic sources is performed. The HBT analyses indicate that the viscosity effect on the two-pion HBT results is small if only the shear viscosity is taken into consideration in the calculations. The bulk viscosity leads to a larger transverse freeze-out configuration of the pion-emitting sources, and thus increases the transverse HBT radii. The results of the longitudinal HBT radius for the source with Bjorken longitudinal scaling are consistent with the experimental data.

24 pages, 6 figures, 1 table; in version 3 detailed derivations for the relaxation equations have been added in the Appendix

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Cited by in corpus (4)

• Transport properties of anisotropically expanding quark-gluon plasma within a quasi-particle model
• Relativistic effects on the back-to-back correlation functions of boson-antiboson pairs in high energy heavy ion collisions
• Squeezed back-to-back correlation of $\bqD^0{\bar \bqD}^0$ in relativistic heavy-ion collisions
• Fluctuations of pion flow harmonics and HBT correlation functions in ultrarelativistic heavy ion collisions