Harmonic R-matrices for Scattering Amplitudes and Spectral Regularization

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

• Jan Plefka (Humboldt)
• Thursday 07 March 2013, 13:00-14:00
• Potter Room (first floor, Pav. B).

If you have a question about this talk, please contact Dr Dorigoni.

Planar N=4 super Yang-Mills appears to be integrable. While this allows to find this theory’s exact spectrum, integrability has hitherto been of no direct use for scattering amplitudes. To remedy this, we deform all scattering amplitudes by a spectral parameter. The deformed tree-level four-point function turns out to be essentially the one-loop R-matrix of the integrable N=4 spin chain satisfying the Yang-Baxter equation. Deformed on-shell three-point functions yield novel three-leg R-matrices satisfying bootstrap equations. Finally, we supply initial evidence that the spectral parameter might find its use as a novel symmetry-respecting regulator replacing dimensional regularization. Its physical meaning is a local deformation of particle helicity, a fact which might be useful for a much larger class of non-integrable four-dimensional field theories.

This talk is part of the Quantum Fields and Strings Seminars series.

This talk is included in these lists:

• All CMS events
• CMS Events
• DAMTP info aggregator
• HEP web page aggregator
• Interested Talks
• Potter Room (first floor, Pav. B)
• Quantum Fields and Strings Seminars
• bld31
• few29

Note that ex-directory lists are not shown.