Kaon Freeze-out dynamics in root sNN=200 GeV Au plus Au collisions at RHIC

0433441 - ÚJF 2015 US eng C - Conference Paper (international conference)
Šumbera, Michal
Kaon Freeze-out dynamics in root sNN=200 GeV Au plus Au collisions at RHIC.
Proceedings of the XLIII International Symposium on Multiparticle Dynamics. Chicago, Illinois: IIT Press, 2014 - (Chekanov, S.; Sullivan, Z.), s. 259-264. ISBN 978-1-61597-002-5.
[XLIII International Symposium on Multiparticle Dynamics (ISMD 2013). Chicago (US), 15.9.2013-20.9.2013]
R&D Projects: GA MŠMT LA09013
Institutional support: RVO:61389005
Keywords : ultra-relativistic heavy ion collisions * femtoscopy * kaons
Subject RIV: BG - Nuclear, Atomic and Molecular Physics, Colliders
http://arxiv.org/abs/arXiv:1312.2723

Measurements of three-dimensional correlation functions of like-sign low transverse momentum kaon pairs from Au+Au collisions at top RHIC energy s√NN=200 GeV are presented. The extracted kaon source function is narrower than the pion one and does not have the long tail along the pair transverse momentum direction. This indicates a much smaller role of long-lived resonance decays and/or of the emission duration on kaon emission. Three-dimensional Gaussian shape of the kaon source function can be adequately reproduced by Therminator simulations with resonance contributions taken into account. Comparison to pion data at the same energy reveals that the kaon Gaussian radii in the outward and sideward directions scale with the transverse mass mT. In the longitudinal direction, unlike at lower SPS energies, the Gaussian radii do not seem to follow the exact mT scaling between kaons and pions.
Permanent Link: http://hdl.handle.net/11104/0237690