4 papers · 1 filter
DiscKosky: Efficient Genealogical Constraints from Sector-By-Sector Critical Point Counting
Giulio Crisanti, Luke Lippstreu, Andrew J. McLeod +1
We present DiscKosky, a new Mathematica package for efficiently generating genealogical constraints on the sequential discontinuities of Feynman integrals. DiscKosky works by track…
New Tools in the Landau Bootstrap
Piotr Bargieła, Giulio Crisanti, Craig Larkin +4
We describe recent advances in our understanding of the analytic structure of Feynman integrals. In particular, we describe two new classes of constraints on such integrals, that i…
Steinmann Violation and Minimal Cuts
Holmfridur S. Hannesdottir, Luke Lippstreu, Andrew J. McLeod +1
The Steinmann relations are known to be violated with respect to some -- but not all -- two-particle momentum channels in massless Feynman integrals. We trace the source of this St…
Minimal Cuts and Genealogical Constraints on Feynman Integrals
Holmfridur S. Hannesdottir, Luke Lippstreu, Andrew J. McLeod +1
We introduce an efficient method for deriving hierarchical constraints on the discontinuities of individual Feynman integrals. This method can be applied at any loop order and part…