String Theory Seminars - Spring 2007


Listed below are the String Theory seminars held at UNC-CH and related talks held at the String Theory seminar at Duke in Fall 2006.



Thursday, January 18, 2007, 4:30pm, 119 Physics, String Theory Seminar at Duke, hosted by UNC
Lance Dixon (SLAC), Is N=8 Supergravity Finite?
[transparencies]

Thursday, January 25, 2007, 4:30PM, 277 Phillips Hall, String Theory Seminar at UNC-CH
Anirban Basu (IAS), Generalized Gross-Neveu models and chiral symmetry breaking from string theory.
[video]

Thursday, March 29, 2007, 3:45pm, 298 Physics, Special String Theory Seminar at Duke
David Morrison (Duke and UCSB), Ricci Flow and Membrane Theory.

Thursday, April 26, 4:30PM, 277 Phillips Hall, String Theory Seminar at UNC-CH
Tristan McLoughlin (Penn State), Worldsheet Scattering and AdS/CFT.
Abstract:
The realization that both the worldsheet theory on AdS_5xS5 and N=4 SYM can, in certain limits, be described by integrable systems has lead to a good deal of recent progress in understanding the AdS/CFT correspondence. This talk will review the perturbative construction of the worldsheet S-matrix in the light-cone gauge and discuss the realization of the global symmetries on asymptotic states. A mild non-locality of the supercharges results in the natural appearance of a non-trivial coproduct and we will outline how the symmetries form a Hopf algebra. At leading order the scattering matrix can be compared with the conjectured all-loop asymptotic S-matrix that enters the Bethe equations for gauge theory anomalous dimensions and it will be shown that they are in good agreement. This S-matrix provides a convenient description of the two theories and should eventually allow us to compare the complete spectrum on both sides of the duality. Further, this talk will present some partial results in extending this equivalence, and the corresponding integrable structures, to include worldsheet quantum loop effects.
[video] [transparencies]

Thursday, May 3, 2007, 4:30PM, 277 Phillips Hall, String Theory Seminar at UNC-CH
Christian Stahn (UNC), Fermionic superstring loop amplitudes in the pure spinor formalism.
[video] [transparencies]



Seminars and Video Archives from

Fall 2006
Spring 2006
Fall 2005
Spring 2005
Fall 2004
Spring 2004
Fall 2003
Spring 2003
Fall 2002
Spring 2002
Fall 2001
Summer 2001
Spring 2001
Fall 2000
Spring 2000
Fall 1999

This page is maintained by Christian Stahn.