Speaker
Zubayer Ahammed
(Department of Atomic Energy (IN))
Description
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\begin{document}
\title{Measurement of energy dependence of $K/\pi$ fluctuation in STAR experiment at RHIC}
\author{Zubayer Ahammed}
\affiliation{Variable Energy Cyclotron Centre, 1/AF Bidhan Nagar, Kolkata-700064, India}
\collaboration{for the STAR collaboration}
\maketitle
\preprint{ }
Event-by-event fluctuations in strangeness may reveal the nature of Quark Gluon Plasma(QGP) phase transition and can be used as a probe for QCD critical point \cite{1}. Dynamical fluctuations in $K/\pi$ at lower beam energy were reported to increase with decreasing $\sqrt{s_{NN}}$ \cite{2} while they remained constant at higher $\sqrt{s_{NN}}$. STAR results for the study of $K/\pi$ fluctuations have been reported earlier for Au+Au collisions at $\sqrt{s_{NN}}$ = 7.7, 11.5, 39, 62.4, 130 and 200 GeV\cite{3,4}.The results have been found to be independent of beam energy. In this poster, we report new results on event-by-event fluctuations in $K/\pi$ at midrapidity from 19.6 and 27 GeV Au+Au collisions. The use of Time Projection Chamber(TPC) and Time of Flight(TOF) detector allows particle identification up to $p_{T}$ $\sim${\it{1.6 GeV/c}}. The advantage of this large particle identification reach in momentum and using a collider facility for $K/\pi$ fluctuation studies will be discussed. The results will be compared with the prediction of a transport model(UrQMD) and statistical hadronization model \cite{5}.
%The status of this analysis and some preliminary results for RHIC BES program will also be presented in the context of energy dependence of $\gc$ correlation.J.I Kapusta and Mekjien, Phys.\ Rev. D {\bf 33} 1304(1986).
\begin{thebibliography}{5}
\bibitem{1}
J.I Kapusta and Mekjien, Phys.\ Rev. D {\bf 33} 1304(1986).
\bibitem{2}
S.V. Afanasiev et. al.(NA49 Collaboration), Phys.\ Rev.\ Lett {\bf 86}, 1965(2001).
\bibitem{3}
B.I. Abelev et. al.(STAR Collaboration),
Phys.\ Rev.\ Lett {\bf 103}, 092301 (2009).
\bibitem{4}
Terrence J. Tarnowsky(STAR Collaboration),
J.\ Phys.\ G {\bf G38}, 124054 (2011).
\bibitem{5}
Giorgi Torrieri, Nucl-th/072062(2007).
\end{thebibliography}
\end{document}
Primary author
Zubayer Ahammed
(Department of Atomic Energy (IN))
