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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 self-dual N=4 theories

Presented by Iñaki García Etxebarria, Max Planck Munich

3 November 2017 13:00 in CM221

Known N=4 theories in four dimensions are characterized by a choice of
gauge group, and in some cases some "discrete theta angles", as
classified by Aharony, Seiberg and Tachikawa. I will review how this
data, for the theories with algebra su(N), is encoded in various
familiar realizations of the theory, in particular in the
compactification of the (2,0) A_N theory on T^2, and in the holographic
AdS_5 \times S^5 dual. I will then show how the resulting structure,
given by a choice of polarization of an appropriate cohomology group,
admits additional choices that, unlike known theories, generically
preserve SL(2,Z) invariance in four dimensions.

Contact daniele.dorigoni@durham.ac.uk or jyotirmoy.bhattacharya@durham.ac.uk for more information