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

Abstract : 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. The kaon Gaussian radii display a monotonic decrease with increasing transverse mass m_T over the interval of 0.55<=m_T<=1.15 GeV/c^2. While the kaon radii are adequately described by the m_T-scaling in the outward and sideward directions, in the longitudinal direction the lowest m_T value exceeds the expectations from a pure hydrodynamical model prediction.
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http://hal.in2p3.fr/in2p3-00807104
Contributor : Sylvie Flores <>
Submitted on : Wednesday, April 3, 2013 - 7:22:10 AM
Last modification on : Thursday, February 7, 2019 - 2:57:49 PM

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L. Adamczyk, W. Borowski, S. Kabana. Freeze-out Dynamics via Charged Kaon Femtoscopy in sqrt(sNN)=200 GeV Central Au+Au Collisions. Physical Review C, American Physical Society, 2013, 88, pp.034906. ⟨10.1103/PhysRevC.88.034906⟩. ⟨in2p3-00807104⟩

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