Speaker
Takahiro Ueda
(Nikhef)
Description
We present Forcer, a new FORM program for the calculation of four-loop massless
propagators. The basic framework is similar to that of the Mincer program
for three-loop massless propagators: the program reduces Feynman
integrals to a set of master integrals in a parametric way.
To overcome an ineludible complexity of the program structure at the
four-loop level, most of the code was automatically generated
or made with computer-assisted derivations. Correctness of the program has been
checked with the recomputation of some quantities in the literature.
Finally we show a number of new results.
Author
Takahiro Ueda
(Nikhef)
Co-authors
Ben Ruijl
(Nikhef, Leiden U.)
Jos Vermaseren
(Nikhef)
