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Seminars & Lectures

* TITLE

Melting Spectral Functions of the Scalar and Vector Mesons in a Holographic QCD Model

* SPEAKERS

Name	Affiliation	E-mail
Tatsuhiro Misumi		sec(at)apctp.org

* HOST(Applicant)

Name	Affiliation	E-mail
-

* DATE / TIME

2009-12-16, 2:00-3:30pm

* PLACE

Conference room #503, APCTP Headquarters, Pohang

* ABSTRACT

We investigate the finite-temperature spectral functions of heavy quarkonia by using the soft-wall AdS/QCD model.
The dissociation of the meson tower onto the AdS black hole leads to the in
medium mass shift and the width broadening in a way similar to the lattice QCD
results for the heavy quarkonium at finite temperature. We discuss the scalar,
the pseudo-scalar, the vector, and the axial-vector mesons and compare their
qualitative features of the melting temperature and growing width. We find that
the axial-vector meson melts earlier than the vector meson, while there appears
only a slight difference between the scalar and pseudo-scalar mesons which also
melt earlier than the vector meson. We also show the momentum dependence of the
spectral function and find it consistent with screening in a hot wind.

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