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New ambitwistor string theories
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DOI：10.1007/JHEP11(2015)038.png)
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摘要
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We describe new ambitwistor string theories that give rise to the recent amplitude formulae for Einstein-Yang-Mills, (Dirac)-Born-Infeld, Galileons and others introduced by Cachazo, He and Yuan. In the case of the Einstein-Yang-Mills amplitudes, an important role is played by a novel worldsheet conformal field theory that provides the appropriate colour factors precisely without the spurious multitrace terms of earlier models that had to be ignored by hand. This is needed to obtain the correct multitrace terms that arise when Yang-Mills is coupled to gravity.
Keyword:
Scattering Amplitudes
Field Theories in Lower Dimensions
Field Theories in Higher Dimensions
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期刊
IF:
5.5
论文数:
4.0W
被引数:
13.7W
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Scattering equations and BCJ relations for gauge and gravitational amplitudes with massive scalar particles具有大量标量粒子的规范和重力振幅的散射方程和BCJ关系OAAI
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