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arXiv 1107.1935hep-th
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单圈规范理论的N >= 4超引力振幅

N >= 4 Supergravity Amplitudes from Gauge Theory at One Loop

Z. Bern, C. Boucher-Veronneau, H. Johansson

摘要:

我们揭示了N >= 4超引力的四点和五点单圈积分振幅与相应的(超)杨-米尔斯振幅之间简单而实用的关系。振幅之间的联系可以通过最近发现的颜色和运动学之间的二元性来简单地理解,这种二元性导致了引力的双重复制结构。这些例子为不同理论的样本在循环层次上的对偶性和双拷贝性质提供了额外的直接证实。

英文摘要:

We expose simple and practical relations between the integrated four- and five-point one-loop amplitudes of N >= 4 supergravity and the corresponding (super-)Yang-Mills amplitudes. The link between the amplitudes is simply understood using the recently uncovered duality between color and kinematics that leads to a double-copy structure for gravity. These examples provide additional direct confirmations of the duality and double-copy properties at loop level for a sample of different theories.

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