Sequential discontinuities of Feynman integrals and the monodromy group
Research output: Contribution to journal › Journal article › peer-review
Documents
- Bourjaily2021_Article_SequentialDiscontinuitiesOfFey(1)
Final published version, 2.21 MB, PDF document
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 phase-space points where all cut momentum channels are simultaneously accessible. As part of this analysis, we explain how to compute sequential discontinuities as monodromies and explore the use of the monodromy group in characterizing the analytic properties of Feynman integrals. We carry out a number of cross-checks of our new formulas in polylogarithmic examples, in some cases to all loop orders.
Original language | English |
---|---|
Article number | 205 |
Journal | Journal of High Energy Physics |
Volume | 2021 |
Issue number | 1 |
Number of pages | 95 |
ISSN | 1029-8479 |
DOIs | |
Publication status | Published - 29 Jan 2021 |
- Scattering Amplitudes, Supersymmetric Gauge Theory
Research areas
Number of downloads are based on statistics from Google Scholar and www.ku.dk
ID: 260357314