[Jlab-seminars] Theory Center Seminar

[Mary Fox]

Theory Center Seminar
Monday, March 28, 2011
CEBAF Center, Room L104
1:00 p.m. (coffee at 12:45 p.m.)

**rho-Mesons in Medium at RHIC and JLAB**

Ralf Friedrich Rapp
Texas A&M University

Dilepton production in heavy-ion collisions is considered as one
of the best probes of the medium formed in these reactions. Once
produced, the dilepton will escape the fireball and provide direct
information on the electromagnetic spectral function in the medium.
For low masses (M<1GeV) the emission rate is dominated by decays
of the rho-meson. I will discuss the general objectives underlying
these studies, as well as calculations of the in-medium rho
spectral function and its phenomenology in heavy-ion collisions.
The same framework is applied to rho photo-production off nuclei as
measured at JLAB. The results suggest an interpretation in terms
of "quark-hadron duality" in a hot and/or dense medium.


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