Abstract
We extend the recently developed Yangian bootstrap for Feynman integrals to Minkowski space, focusing on the case of the one-loop box integral. The space of Yangian invariants is spanned by the Bloch-Wigner function and its discontinuities. Using only input from symmetries, we constrain the functional form of the box integral in all 64 kinematic regions up to twelve (out of a priori 256) undetermined constants. These need to be fixed by other means. We do this explicitly, employing two alternative methods. This results in a novel compact formula for the box integral valid in all kinematic regions of Minkowski space.
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ArXiv ePrint: 2012.07852
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Corcoran, L., Loebbert, F., Miczajka, J. et al. Minkowski box from Yangian bootstrap. J. High Energ. Phys. 2021, 160 (2021). https://doi.org/10.1007/JHEP04(2021)160
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DOI: https://doi.org/10.1007/JHEP04(2021)160