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Amplitudes on plane waves from ambitwistor strings

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Title: Amplitudes on plane waves from ambitwistor strings
Authors: Adamo, T
Casali, E
Mason, L
Nekovar, S
Item Type: Journal Article
Abstract: In marked contrast to conventional string theory, ambitwistor strings remain solvable worldsheet theories when coupled to curved background fields. We use this fact to consider the quantization of ambitwistor strings on plane wave metric and plane wave gauge field backgrounds. In each case, the worldsheet model is anomaly free as a consequence of the background satisfying the field equations. We derive vertex operators (in both fixed and descended picture numbers) for gravitons and gluons on these backgrounds from the worldsheet CFT, and study the 3-point functions of these vertex operators on the Riemann sphere. These worldsheet correlation functions reproduce the known results for 3-point scattering amplitudes of gravitons and gluons in gravitational and gauge theoretic plane wave backgrounds, respectively.
Issue Date: 24-Nov-2017
Date of Acceptance: 8-Nov-2017
URI: http://hdl.handle.net/10044/1/55358
DOI: https://dx.doi.org/10.1007/JHEP11(2017)160
ISSN: 1029-8479
Publisher: Springer Verlag (Germany)
Journal / Book Title: Journal of High Energy Physics
Volume: 2017
Issue: 11
Copyright Statement: Open Access, © The Authors. Article funded by SCOAP3
Keywords: Science & Technology
Physical Sciences
Physics, Particles & Fields
Physics
Scattering Amplitudes
Superstrings and Heterotic Strings
SL(2,R) WZW MODEL
GRAVITATIONAL-WAVES
GENERAL-RELATIVITY
FIELDS
SUPERGRAVITY
BACKGROUNDS
SPACETIMES
INVARIANCE
EQUATIONS
PROPERTY
01 Mathematical Sciences
02 Physical Sciences
Nuclear & Particles Physics
Publication Status: Published
Article Number: 160
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