New ambitwistor string theories
New ambitwistor string theories
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DOI：
10.1007/jhep11(2015)038
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发表时间：
2015-11-05
影响因子：
5.4
通讯作者：
Roehrig, Kai A.
中科院分区：
文献类型：
--
作者：
Casali, Eduardo;Geyer, Yvonne;Roehrig, Kai A.
我们描述了新的ambitwistor弦理论，产生了最近的振幅公式Einstein-Yang-米尔斯，（狄拉克）-Born-Infeld，Galileons和其他介绍Cachazo，他和袁。在爱因斯坦-杨-米尔斯振幅的情况下，一个新的世界面共形场论发挥了重要作用，它精确地提供了适当的色因子，而没有早期模型中必须手动忽略的虚假多道项。这是需要获得正确的多道项时出现的杨米尔斯耦合到重力。
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.