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Heterotic Kerr-Schild double field theory and classical double copy

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Title
Heterotic Kerr-Schild double field theory and classical double copy
Author(s)
Wonyoung Cho; Kanghoon Lee
Publication Date
2019-07
Journal
JOURNAL OF HIGH ENERGY PHYSICS, v., no.7, pp.030 -
Publisher
SPRINGER
Abstract
We discuss the generalization of the Kerr-Schild (KS) formalism for general relativity and double field theory (DFT) to the heterotic DFT and supergravity. We first introduce a heterotic KS ansatz by introducing a pair of null O (d, d+G) generalized tangent vectors. The pair of null vectors are represented by a pair of d-dimensional vector fields, and one of the vector fields is not a null vector. This implies that the null property of the usual KS formalism, which plays a crucial role in linearizing the field equations, can be partially relaxed in a consistent way. We show that the equations of motion under the heterotic KS ansatz in a flat background can be reduced to linear equations. Using the heterotic KS equations, we establish the single and zeroth copy for heterotic supergravity and derive the Maxwell and Maxwell-scalar equations. This agrees with the KLT relation for heterotic string theory. c The Authors.
URI
https://pr.ibs.re.kr/handle/8788114/6141
ISSN
1029-8479
Appears in Collections:
Center for Fundamental Theory(순수물리이론 연구단) > Journal Papers (저널논문)
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