BMS, String Theory, and Soft Theorems
Avery, Steven G. · Schwab, Burkhard U. W.
Original · EN
We study the action of the BMS group in critical, bosonic string theory living on a target space of the form Mᵈ× C. Here Mᵈ is d-dimensional (asymptotically) flat spacetime and C is an arbitrary compactification. We provide a treatment of generalized Ward--Takahashi identities and derive consistent boundary conditions for any d from string theory considerations. Finally, we derive BMS transformations in higher dimensional spacetimes and show that the generalized Ward--Takahashi identity of BMS produces Weinberg's soft theorem in string theory.
English translation
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