Document Type

Article

Publication Date

9-2013

DOI

10.1103/PhysRevC.88.034906

Publication Title

Physical Review C

Volume

88

Issue

3

Pages

034906 (8 pages)

Abstract

We present measurements of three-dimensional correlation functions of like-sign, low-transverse-momentum kaon pairs from √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 mT over the interval of 0.55≤mT≤1.15 GeV/c2. While the kaon radii are adequately described by the mT -scaling in the outward and sideward directions, in the longitudinal direction the lowest mT value exceeds the expectations from a pure hydrodynamical model prediction.

Comments

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Original Publication Citation

Adamczyk, L., Adkins, J. K., Agakishiev, G., Aggarwal, M. M., Ahammed, Z., Alekseev, I., . . . Collaboration, S. (2013). Freeze-out dynamics via charged kaon femtoscopy in √ s N N = 200 GeV central Au + Au collisions. Physical Review C, 88(3), 8. doi:10.1103/PhysRevC.88.034906

ORCID

0000-0002-5680-1814 (Bueltmann)

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