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Freeze-out dynamics via charged kaon femtoscopy in √ sNN=200 GeV central Au+Au collisions

L Adamczyk Lucas Mafia de Lima; Marcelo Gameiro Munhoz; Renato Aparecido Negrão de Oliveira; Ulisses Gulart de Souza; Alexandre Alarcon do Passo Suaide; Alejandro Szanto de Toledo

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Título:
Freeze-out dynamics via charged kaon femtoscopy in √ sNN=200 GeV central Au+Au collisions
Autor: L Adamczyk
Lucas Mafia de Lima; Marcelo Gameiro Munhoz; Renato Aparecido Negrão de Oliveira; Ulisses Gulart de Souza; Alexandre Alarcon do Passo Suaide; Alejandro Szanto de Toledo
Assuntos: COLISÕES DE ÍONS PESADOS RELATIVÍSTICOS
Notas: arXiv.1302.3168
Descrição: 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/c 2 . 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
Editor: São Paulo
Data de criação/publicação: 2013
Formato: 8 p.
Idioma: Inglês

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