2 papers
hep-th2018
Universal deformation of particle momenta space in perturbation theory
Stanislav Srednyak
We define an embedding of the space of complex momenta and masses in perturbation theory into a universal projective space. This embedding is natural in the sense of properties of…
math-ph2017
Feynman integrals as flat bundles over the complement of Landau varieties
Stanislav Srednyak
We demonstrate that Feynman integrals of a fixed diagram form a flat vector bundle over the complement of Landau varieties that possesses a connection \begin{equation} \frac{\parti…