Two-loop Integrands from the Riemann Sphere

Add to your list(s) Download to your calendar using vCal

• Yvonne Geyer (University of Oxford)
• Thursday 30 June 2016, 11:30-12:30
• Seminar Room 1, Newton Institute.

If you have a question about this talk, please contact INI IT.

GTAW01 - General relativity: from geometry to amplitudes

Co-authors: Lionel Mason (University of Oxford), Ricardo Monteiro (CERN), Piotr Tourkine (University of Cambridge)

Worldsheet formulations of quantum field theories have had wide-ranging impact on the study of scattering amplitudes. However, the mathematical framework becomes very challenging on the higher-genus worldsheets required to describe loop effects. I will describe how, in such worldsheet models based on the scattering equations, formulae on higher-genus surfaces can be transformed to ones on the Riemann sphere. My talk will focus on new developments at two loops for both supergravity and super Yang-Mills theory, and briefly discuss a proposal for the all-loop integrand.

Related Links

• http://arxiv.org/abs/1507.00321
• http://arxiv.org/abs/1511.06315

This talk is part of the Isaac Newton Institute Seminar Series series.

This talk is included in these lists:

• All CMS events
• Featured lists
• INI info aggregator
• Isaac Newton Institute Seminar Series
• School of Physical Sciences
• Seminar Room 1, Newton Institute
• bld31

Note that ex-directory lists are not shown.