Beam energy dependence of Hanbury-Brown-Twiss radii from a blast-wave model

Understand

The beam energy dependence of correlation lengths (the Hanbury-Brown-Twiss radii) is calculated by using a blast-wave model and the results are comparable with those from RHIC-STAR beam energy scan data as well as the LHC-ALICE measurements.

• A set of parameter for the blast-wave model as a function of beam energy under study are obtained by fit to the HBT radii at each energy point.
• The transverse momentum dependence of HBT radii is presented with the extracted parameters for Au + Au collision at $\sqrt{s_{NN}} = $ 200 GeV and for Pb+Pb collisions at 2.76 TeV.
• From our study one can learn that particle emission duration can not be ignored while calculating the HBT radii with the same parameters.