Soft theorems from anomalous symmetries
Journal
Journal of High Energy Physics
Journal Volume
2015
Journal Issue
12
Pages
1-31
Date Issued
2015
Author(s)
Wen, C.
Abstract
Abstract: We discuss constraints imposed by soft limits for effective field theories arising from symmetry breaking. In particular, we consider those associated with anomalous conformal symmetry as well as duality symmetries in supergravity. We verify these soft theorems for the dilaton effective action relevant for the a-theorem, as well as the one-loop effective action for N=4 supergravity. Using the universality of leading transcendental coefficients in the α′ expansion of string theory amplitudes, we study the matrix elements of operator R4 with half maximal supersymmetry. We construct the non-linear completion of R4 that satisfies both single and double soft theorems up to seven points. This supports the existence of duality invariant completion of R4.
Type
journal article