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arXiv · 1912.12960

One-loop CHY-Integrand of Bi-adjoint Scalar Theory

Bo Feng·Chang Hu
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Abstract

In this paper, the one-loop CHY-integrands of bi-adjoint scalar theory has been reinvestigated. Differing from previous constructions, we have explicitly removed contributions from tadpole and massless bubbles when taking the forward limit of corresponding tree-level amplitudes. The way to remove those singular contributions is to exploit the idea of 'picking poles', which is to multiply a special cross ratio factor with the role of isolating terms having a particular pole structure.

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Bo Feng, Chang Hu. 2019-12-30. One-loop CHY-Integrand of Bi-adjoint Scalar Theory. https://doi.org/10.1007/jhep02(2020)187

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