### 14.10.2015 (Wednesday)

#### All order alpha' corrections to BPS,non-BPS and brane anti-brane effective actions of type IIA,IIB superstring theory

Regular Seminar Ehsan Hatefi (Queen Mary)

 at: 14:00 ICroom H503 abstract: We would like to talk about all kinds of supersymmetric and non-supersymmetric scattering amplitudes of type IIA,IIB superstring theory as well as their corrections. In fact we want to address how to get to a universal conjecture for DBI, Chern-Simons and more importantly new Wess Zumino actions with their all order $\alpha'$ corrections. Indeed we try to provide a comprehensive explanation even for D- brane-anti D-brane systems, where various new techniques will be also introduced. If time allows , we then mention several issues related to those effective actions and eventually highlight some comments about higher point functions of the Mixed closed string RR , scalar fields in different pictures of the string theory amplitude.