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arXiv 1709.07883hep-th
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CHY公式的次导多重软引力子定理检验

Testing Subleading Multiple Soft Graviton Theorem for CHY Prescription

Subhroneel Chakrabarti, Sitender Pratap Kashyap, Biswajit Sahoo, Ashoke Sen, Mritunjay Verma

摘要:

在arXiv:1707.06803中,我们在一般的引力量子理论中,对任意数目的软外引力子和任意数目的具有任意质量和自旋的有限能量外态,导出了次要的多重软引力子定理。在本文中,我们证明了这一点明确使用的树级散射振幅的任意数量的引力子在爱因斯坦引力的CHY公式。我们特别注意修正振幅的符号,并解决了arXiv:1707.06803中的一般结果与以前由CHY公式得到的软引力子定理的结果之间的明显差异。

英文摘要:

In arXiv:1707.06803 we derived the subleading multiple soft graviton theorem in a generic quantum theory of gravity for arbitrary number of soft external gravitons and arbitrary number of finite energy external states carrying arbitrary mass and spin. In this paper we verify this explicitly using the CHY formula for tree level scattering amplitudes of arbitrary number of gravitons in Einstein gravity. We pay special care to fix the signs of the amplitudes and resolve an apparent discrepancy between our general results in arXiv:1707.06803 and previous results on soft graviton theorem from CHY formula.

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