Seminar series
Date
Tue, 02 Feb 2016
Time
12:00 -
13:15
Location
L4
Speaker
Dirk Kreimer (Berlin)
Organisation
HU Berlin
Amplitudes in quantum field theory have discontinuities when regarded as
functions of
the scattering kinematics. Such discontinuities can be determined from
Cutkosky rules.
We present a structural analysis of such rules for massive quantum field
theory which combines
algebraic geometry with the combinatorics of Karen Vogtmann's Outer Space.
This is joint work with Spencer Bloch (arXiv:1512.01705).