Freeze-out Dynamics via Charged Kaon Femtoscopy in sqrt(sNN)=200 GeV Central Au+Au Collisions

Understand

We present measurements of three-dimensional correlation functions of like-sign low transverse momentum kaon pairs from sqrt(sNN)=200 GeV Au+Au collisions.

• A Cartesian surface-spherical harmonic decomposition technique was used to extract the kaon source function.
• The latter was found to have a three-dimensional Gaussian shape and can be adequately reproduced by Therminator event generator simulations with resonance contributions taken into account.
• Compared to the pion one, the kaon source function is generally narrower and does not have the long tail along the pair transverse momentum direction.