Towards 1% precision at colliders: infrared subtraction in perturbative QCD

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• Fabrizio Caola (Oxford)
• Thursday 06 June 2019, 16:00-17:00
• Ryle Seminar Room no. 930, Rutherford Building, Cavendish Laboratory.

If you have a question about this talk, please contact Mathieu Pellen.

After the Higgs boson discovery, no direct evidence few new states have been found at the LHC . In this situation, precise Standard Model (SM) predictions become essential, as they can identify deviations from expected behaviour pointing to new physics.

An important ingredient of such predictions are sophisticated higher order perturbative QCD calculations. One of the key difficulties of such calculations is the appearance of a non-trivial infrared singularity structure, that must be dealt with. In this talk, I will discuss this problem and several proposed solutions. In particular, I will describe the nested soft-collinear subtraction scheme, which is the first method which is both fully local and fully analytic. I will give an overview of the construction, emphasising its physical transparency and relative compactness, and will give a short outlook on future developments.

This talk is part of the HEP phenomenology joint Cavendish-DAMTP seminar series.

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