Sequential discontinuities of Feynman integrals and the monodromy group
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DOI: 10.1007/jhep01(2021)205
Abstract: We generalize the relation between discontinuities of scattering amplitudes and cut diagrams to cover sequential discontinuities (discontinuities of discontinuities) in arbitrary momentum channels. The new relations are derived using time-ordered perturbation theory, and hold at… read more here.
Keywords: discontinuities feynman; sequential discontinuities; integrals monodromy; feynman integrals ... See more keywords
A rigid local system with monodromy group the big Conway group $2.\mathsf {Co}_1$ and two others with monodromy group the Suzuki group $6.{{Suz}}$
Sign Up to like & getrecommendations! Published in 2019 at "Transactions of the American Mathematical Society"
DOI: 10.1090/tran/7967
Abstract: In the first three sections, we develop some basic facts about hypergeometric sheaves on the multiplicative group ${\mathbb G}_m$ in characteristic $p >0$. In the fourth and fifth sections, we specialize to quite special classses… read more here.
Keywords: monodromy group; monodromy groups; group; monodromy ... See more keywords