High Energy Theory Seminar
18 February 2011
Henriette Elvang (Michigan)
Symmetry Restrictions of
Candidate Counterterms in N=8 Supergravity
Abstract:
There has recently been renewed interest in the UV structure of loop
amplitudes in perturbative N=8 supergravity in four dimensions. We
explore the symmetries of prospective local counterterm operators in
this theory by examining if their matrix elements satisfy the
constraints of SUSY and R-symmetry Ward identities. This allow us to
eliminate certain classes of operators as candidate counterterms. We
impose further restrictions by studying compatibility with the
spontaneously broken global E7(7)-symmetry of the theory; this is done
with the help of soft-scalar theorems. The current status of N=8 UV
finiteness/divergences will be summarized at the end of the talk.
Back to the HET seminar page