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Journal of High Energy Physics

, Volume 2017, Issue 6, pp 1–18

First Online: 12 June 2017Received: 12 April 2017Revised: 22 May 2017Accepted: 26 May 2017DOI: 10.1007-JHEP062017051

Cite this article as: Yu, M., Zhang, C. & Zhang, YZ. J. High Energ. Phys. 2017 2017: 1. doi:10.1007-JHEP062017051 Abstract

We generalize the CHY formalism to one-loop level, based on the framework of the null string theory. The null string, a tensionless string theory, produces the same results as the ones from the chiral ambitwistor string theory, with the latter believed to give a string interpretation of the CHY formalism. A key feature of our formalism is the interpretation of the modular parameters. We find that the S modular transformation invariance of the ordinary string theory does not survive in the case of the null string theory. Treating the integration over the modular parameters this way enable us to derive the n-gons scattering amplitude in field theory, thus proving the n-gons conjecture.

KeywordsScattering Amplitudes Bosonic Strings Conformal Field Theory ArXiv ePrint: 1704.01290

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Author: Ming Yu - Chi Zhang - Yao-Zhong Zhang


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