Radiation beyond the soft approximation

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• Chris White (Glasgow)
• Tuesday 24 March 2015, 15:00-16:00
• Rutherford Seminar Room B.

If you have a question about this talk, please contact Alexander Mitov.

It is well-known that large logarithms arise in scattering amplitudes at all orders in perturbation theory, that have to be summed up to all orders (“resummed”) in order to produce reliable collider predictions. These terms arise when emitted gauge bosons become “soft” (have zero 4-momentum), and many approaches exist for classifying them. Until recently, much less was known about how to go beyond this approximation. This is important for improving the precision of QCD predictions, but also has more formal applications. In this talk, I will summarise work done in this area, and present a recently obtained factorisation formula for next-to-soft and collinear effects. If time permits, I will also look at relations between QCD and gravity.

This talk is part of the Cavendish HEP Seminars series.

This talk is included in these lists:

• All Cavendish Laboratory Seminars
• All Talks (aka the CURE list)
• Cavendish HEP Seminars
• Centre for Health Leadership and Enterprise
• Featured lists
• ME Seminar
• Neurons, Fake News, DNA and your iPhone: The Mathematics of Information
• Rutherford Seminar Room B
• School of Physical Sciences
• Thin Film Magnetic Talks
• few29

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