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Nuclear Physics Seminars

ics Nuclear
Thursday, March 1, 2007
4:00 PM
Physics Building, Room 204
Note special date.
Note special time.
Diana Vaman [Host: Hank Thacker]
University of Michigan
"Holography with backreacted flavor"
ABSTRACT:
The gauge/string holographic duality has opened a new window into the non-perturbative 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 quark-anti 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 non-extremal 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.

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