Abstract
We apply the differential equation technique to the calculation of the one-loop massless diagram with five onshell legs. Using the reduction to ϵ-form, we manage to obtain a simple one-fold integral representation exact in space-time dimensionality. The expansion of the obtained result in ϵ and the analytical continuation to physical regions are discussed.
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Kozlov, M.G., Lee, R.N. One-loop pentagon integral in d dimensions from differential equations in ϵ-form. J. High Energ. Phys. 2016, 21 (2016). https://doi.org/10.1007/JHEP02(2016)021
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DOI: https://doi.org/10.1007/JHEP02(2016)021