Wednesday weekly meeting

Wednesday 9 Dec 2020, 11:00 → 12:00 Asia/Tehran

Gholamhossein Haghighat (IPM)

General weekly meeting of the school of particles and accelerators

Meeting room link:                                                                                                                   https://www.skyroom.online/ch/ipm-particles/school-of-particles-and-accelerators-weekly-meeting

11:00 → 12:00 Effective action of bosonic string theory at order $\alpha'^2$

Recently, it has been shown that the gauge invariance requires the minimum number of independent couplings for $B$-field, metric and dilaton at order $\alpha'^2$ to be 60. In this paper we fix the corresponding 60 parameters in string theory by requiring the couplings to be invariant under the global T-duality transformations. The Riemann cubed terms are exactly the same as the couplings that have been found by the S-matrix calculations.

Speaker: Dr Mohammad Reza Garousi (Ferdowsi University of Mashhad)

Slides up.pdf