Quasi-Finite Bases For Virtual Corrections In Quantum Field Theory
- Event time: 2:00pm
- Event date: 25th February 2015
- Speaker: Robert Schabinger (MITP, Mainz)
- Location: Higgs Centre Seminar Room, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB
We present a new method for the decomposition of multi-loop Feynman integrals into quasi-finite Feynman integrals. These are defined in shifted dimensions with higher powers of the propagators, make explicit both infrared and ultraviolet divergences, and allow for an immediate and trivial expansion in the parameter of dimensional regularization.
Our approach avoids the introduction of spurious structures and thereby leaves integrals particularly accessible to direct analytical integration techniques. The method also looks very promising from the point of view of numerical analysis, as suggested by recent studies of the three-loop form factor in massless QCD.
The Particle Physics Theory seminar is a weekly series of talks reflecting the diverse interests of the group. Topics include analytic and numerical calculations based on the Standard Model of elementary particle physics, theories exploring new physics, as well as more formal developments in gauge theories and gravity..