Aug 12 – 18, 2012
US/Eastern timezone

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Measurement of energy dependence of $K/\pi$ fluctuation in STAR experiment at RHIC

Aug 16, 2012, 4:00 PM
Regency 1/3 and Ambassador

Regency 1/3 and Ambassador

Poster Correlations and fluctuations Poster Session Reception


Zubayer Ahammed (Department of Atomic Energy (IN))


\documentclass[prc,aps,nofootinbib,% tightenlines,superscriptaddress,floatfix, preprintnumbers]{revtex4} \usepackage{bbm} \usepackage{graphicx} \usepackage{amsmath} \usepackage{amsfonts,amsbsy} \usepackage{amssymb} \renewcommand{\thefigure}{\arabic{figure}} \newcommand{\ndyn}{\nu_{dyn}} \newcommand{\gc}{{\gamma-\mathrm{ch}}} \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))

Presentation materials