We use cookies to ensure that we give you the best experience on our website. You can change your cookie settings at any time. Otherwise, we'll assume you're OK to continue.

Department of Mathematical Sciences

Seminar Archives

On this page you can find information about seminars in this and previous academic years, where available on the database.

Maths HEP Lunchtime Seminars: On the perturbative structure of the S-matrix of massless particles

Presented by Paolo Benincasa, University of Durham

21 November 2008 13:00 in CM221

The analysis of the singularities in the S-matrix of particles has shown
that perturbative structure field theories can be much simpler than what
Feynman diagrams tell us. In particular, there exist classes of theories
whose perturbative S-matrix is completely determined by a sub-set of its
singularities. At tree level this reflect with the existence of recursion
relations. At loop level, there are special singularities, the leading
singularities, which are believed to determine a class of theories which
N=4 SYM and N=8 supergravity belongs to. I will discuss both the tree and
loop level, with a particular attention on the leading singularity
technique and its application to the investigation of the perturbative N=8

Contact or for more information