Direct reduction of multiloop multiscale scattering amplitudes

@article{Wang2020DirectRO,
  title={Direct reduction of multiloop multiscale scattering amplitudes},
  author={Yefan Wang and Z. Li and Najam ul Basat},
  journal={Physical Review D},
  year={2020},
  volume={101},
  pages={076023}
}
We propose an alternative approach based on series representation to directly reduce multi-loop multi-scale scattering amplitude into set of freely chosen master integrals. And this approach avoid complicated calculations of inverse matrix and dimension shift for tensor reduction calculation. During this procedure we further utilize the Feynman parameterization to calculate the coefficients of series representation and obtain the form factors. Conventional methodologies are used only for scalar… Expand

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