# MS Seminar (Mathematics - String Theory)

Speaker: Matthias Weissenbacher (Kavli IPMU) Higher Derivative Terms in M-Theory Reductions Wed, Nov 25, 2015, 13:15 - 14:45 Seminar Room B Supergravity theories capture the low energy dynamics of string theory. The finiteness of the string length is imprinted in them via $\alphaâ€™$-corrections given by higher derivative corrections to the leading order two derivative Lagrangian. These corrections can be lifted to eleven-dimensional supergravity the long wave length description of M-theory. I will present a background solution to the eleven-dimensional supergravity action, including terms quartic and cubic in the Riemann curvature, that admit an eight-dimensional compact space. Furthermore, I comment on the supersymmetry properties of this solution and will then dimensional reduce the complete action at eight-derivative level. Finally, the supersymmetry of the lower dimensional theory is discussed.