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<< January 11, 2013 >>

Friday, January 11
High Energy Theory Seminar - IAS - David Skinner, University of Cambridge; IAS - “Twistor Strings for N=8 Supergravity” I'll explain a new way of looking at 4d supergravity --- as a theory of holomorphic maps into Penrose's twistor space. Allowing twistor space to have N fermionic directions, the theory is anomaly free when N=8. Via the Penrose transform, the vertex operators correspond to an N=8 Einstein supergravity multiplet. In the first instance, the model describes SO(8) gauged supergravity in AdS_4. Upon taking the flat space, ungauged limit, the complete classical S-matrix is recovered from worldsheet correlation functions. Bloomberg Lecture Hall · 1:30 p.m.– 3:00 p.m.

Friday, January 11

High Energy Theory Seminar - IAS - David Skinner, University of Cambridge; IAS - “Twistor Strings for N=8 Supergravity”
I'll explain a new way of looking at 4d supergravity --- as a theory of holomorphic maps into Penrose's twistor space. Allowing twistor space to have N fermionic directions, the theory is anomaly free when N=8. Via the Penrose transform, the vertex operators correspond to an N=8 Einstein supergravity multiplet. In the first instance, the model describes SO(8) gauged supergravity in AdS_4. Upon taking the flat space, ungauged limit, the complete classical S-matrix is recovered from worldsheet correlation functions.
Bloomberg Lecture Hall · 1:30 p.m.– 3:00 p.m.