Quarkonium at finite temperature \footnote{\uppercase{B}ased on work done in collaboration with \uppercase{S}. \uppercase{D}atta, \uppercase{F}. \uppercase{K}arsch and \uppercase{I}. \uppercase{W}etzorke. }
P. Petreczky \footnote{\uppercase{G}oldhaber fellow
supported under contract \uppercase{DE}-\uppercase{AC}02-98\uppercase{CH}10886 with the \uppercase{U.S.} \uppercase{D}epartment of \uppercase{E}nergy.}
I discuss quarkonium spectral functions at finite temperature reconstructed using the Maximum Entropy Method. I show in particular that the $J/\psi$ survives in the deconfined phase up to $1.5T_c$
my.tex
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\title{Quarkonium at finite temperature
\footnote{\uppercase{B}ased on work done in 
collaboration with \uppercase{S}. \uppercase{D}atta, \uppercase{F}. 
\uppercase{K}arsch and
\uppercase{I}. \uppercase{W}etzorke.  }}
\author{P. Petreczky
\footnote{\uppercase{G}oldhaber fellow, supported  
under contract 
\uppercase{DE}-\uppercase{AC}02-98\uppercase{CH}10886 with 
the \uppercase{U.S.} \uppercase{D}epartment of \uppercase{E}nergy.}}
\address{Physics Department, Brookhaven National Laboratory,
Upton, NY 11973, USA}

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\maketitle
\vspace*{-0.4cm}
\abstracts{
I discuss quarkonium spectral functions at finite temperature
reconstructed using the Maximum Entropy Method.
I show in particular that the $J/\psi$ survives
in the deconfined phase up to $1.5T_c$}
\vspace*{-0.3cm}
The study of quarkonium system at finite temperature 
has been a subject of considerable interest since
the work of Matusi and Satz \cite{ms}, but a first principle
calculation of quarkonium properties at non-zero 
temperature was missing. It was
shown, however, that the application of the Maximum Entropy
Method (MEM) can make such calculation possible \cite{mem}. The method
have been successfully applied at zero \cite{mem} as well as at
finite temperature \cite{ft}.
\begin{window}[0,r,
{\includegraphics[width=2.1in]{vc664.eps}},{}]
I am going to discuss charmonium
spectral function calculated with MEM on $48^3 \times N_{\tau}$
lattices at lattice spacing $a^{-1}=4.86$GeV and $N_{\tau}=24,16$
and $12$ corresponding to temperatures $0.75T_c$, $1.12T_c$
and $1.5T_c$ ($T_c$ being the deconfinement temperature). 
The results for the vector channel are shown
in the Figure. As one can see the $J/\psi$ seems to survive
up to temperatures $1.5T_c$. Similar calculation have 
been performed in the scalar and axial vector channels
which correspond to the $P$-state charmonia, but no peak
was found there.
\end{window}
\vspace*{-0.4cm}
\begin{thebibliography}{0}
\bibitem{ms}
T.~Matsui and H.~Satz, {\it Phys. Lett.} {\bf B178},  416 (1986).
\bibitem{mem} M.~Asakawa et al., {\it Prog. Part. Nucl. Phys.}
{\bf 46}, 459 (2001).
\bibitem{ft} F.~Karsch et al., {\it Phys. Lett.} {\bf B530}, 147 (2002); 
S.~Datta et al., hep-lat/0208012; M.~Asakawa and T.~Hatsuda, hep-lat/0308034.

\end{thebibliography}

\end{document}

hep-lat0310059.extracted_bib
\begin{thebibliography}{0}
\bibitem{ms}
T.~Matsui and H.~Satz, {\it Phys. Lett.} {\bf B178},  416 (1986).
\bibitem{mem} M.~Asakawa et al., {\it Prog. Part. Nucl. Phys.}
{\bf 46}, 459 (2001).
\bibitem{ft} F.~Karsch et al., {\it Phys. Lett.} {\bf B530}, 147 (2002); 
S.~Datta et al., hep-lat/0208012; M.~Asakawa and T.~Hatsuda, hep-lat/0308034.

\end{thebibliography}