One Loop Integrands for Scattering Amplitudes from the Riemann Sphere

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• Ricardo Monteiro (CERN - European Organisation for Nuclear Research)
• Thursday 30 June 2016, 10:00-11:00
• Seminar Room 1, Newton Institute.

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GTAW01 - General relativity: from geometry to amplitudes

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 genus one surfaces can be transformed to ones on the Riemann sphere. I will present formulae for the one-loop integrands of scattering amplitudes in gravity and gauge theory, with or without supersymmetry.

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.

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