ABSTRACT:
The gauge/string holographic duality has opened a new window into the
nonperturbative regime of gauge theories.
I will present the construction of supergravity duals to N=2 supersymmetric gauge theories coupled with matter (quarks) in the fundamental representation of the gauge group. The supergravity solutions are obtained by taking the decoupling limit of D3/D7 (color/flavor) brane systems.
The backreaction of the flavor branes needs to be accounted for, as it allows to go beyond the quenched approximation on the dual gauge theory side. I will give the spectrum of mesons (bound states of quarkanti quark pairs) and discuss the effect of the backreacted flavor.
Lastly, I will present the supergravity dual to the finite temperature
gauge theory. This corresponds to a backreacted nonextremal D3/D7 system.
At finite temperature, the fundamental matter undergoes a first order
phase transition. I will discuss this phase transition from the perspective of the supergravity dual.

Nuclear Physics Seminar Thursday, March 1, 2007 4:00 PM Physics Building, Room 204 Note special date. Note special time. Note special room. 
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