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Durham University

Department of Mathematical Sciences


This week's seminars

Maths HEP Lunchtime Seminars: Supersymmetric S-matrices via ambitwistors and the polarized scattering equations.

Presented by Lionel Mason, University of Oxford

15 March 2019 13:00 in CM101

Six-dimensional theories provide a unification of four-dimensional theories via dimensional reduction and access to some of the novel features arising from M-theory. Ambitwistor strings directly generate S-matrices for massless theories in terms of formulae that localize on the solutions to the scattering equations; algebraic equations that determine n points on the Riemann sphere from n massless momenta. These are sufficient to provide compact formulae for tree-level S-matrices for bosonic theories. This talk introduces their extension to the polarized scattering equations which arise from twistorial versions of ambitwistor-strings. These lead to simple explicit formulae for superamplitudes in 6D for super Yang-Mills, supergravity, D5 and M5-branes and massive superamplitudes in 4D. The framework extends also to 10 and 11 dimensions. This is based on joint work with Yvonne Geyer, arxiv:1812.05548 and 1901.00134.

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Research Seminars by Series

The research groups in the Department of Mathematical Sciences hold several seminar series in term time. Information on date, time and location are available here.

For information on previous years' seminars please see the seminar archives pages.