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Freeze-out dynamics via charged kaon femtoscopy in<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msqrt><mml:msub><mml:mi>s</mml:mi><mml:mrow><mml:mi>N</mml:mi><mml:mi>N</mml:mi></mml:mrow></mml:msub></mml:msqrt><mml:mo>=</mml:mo><mml:mn>200</mml:mn></mml:mrow></mml:math>GeV central Au + Au collisions
We present measurements of three-dimensional correlation functions of like-sign, low-transverse-momentum kaon pairs from $\sqrt{{s}_{NN}}=200$ GeV $\mathrm{Au}+\mathrm{Au}$ 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 …