Ambitwistor string amplitudes in light-like linear dilaton background
Abstract
Using the ambitwistor string theory, we study graviton scattering amplitudes in a light-like linear dilaton background of 10-dimensional supergravity. At the tree level, we find that the three-graviton amplitude coincides with the type-II superstring theory, and the four-graviton or more amplitudes differ from the superstring theory but satisfy the scattering equations. Due to a modified momentum conservation law different at each order in genus expansion, a nonzero amplitude is determined solely from the particular order in perturbation theory without further corrections.
- Publication:
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International Journal of Modern Physics A
- Pub Date:
- May 2023
- DOI:
- 10.1142/S0217751X23500653
- arXiv:
- arXiv:2303.00238
- Bibcode:
- 2023IJMPA..3850065K
- Keywords:
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- Ambitwistor string theory;
- scattering amplitude;
- light-like linear dilaton;
- 11.25.–w;
- 11.80.–m;
- High Energy Physics - Theory
- E-Print:
- 10 pages, v2: some clarification added