Feynman integrals: beyond polylogarithms
- Event time: 2:00pm
- Event date: 16th March 2016
- Speaker: David Broadhurst (Open University)
- Location: Higgs Centre Seminar Room, James Clerk Maxwell Building (JCMB) James Clerk Maxwell Building Peter Guthrie Tait Road Edinburgh EH9 3FD GB
Feynman integrals sometimes yield polylogarithms, especially when masses may be ignored. Yet algebraic geometry reveals that multiloop massless diagrams eventually outgrow the kindergarten of polylogs, such as multiple zeta values. With massive propagators, this happens at merely two loops, where one encounters an elliptic dilogarithm. I shall report on the fascinating mathematical structure revealed by massive diagrams with up to 7 loops.
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..