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SUMMARY:Beyond unitarity: new on-shell representations for loop amplitudes
  - Simon Caron-Huot
DTSTART:20151105T130000Z
DTEND:20151105T140000Z
UID:TALK61029@talks.cam.ac.uk
CONTACT:Dr. Piotr Tourkine
DESCRIPTION:It has been very fruitful to learn to rephrase loop computatio
 ns\, in quantum field theory\, in terms of meaningful tree-level building 
 blocks.\nIn this talk I present a novel representation that combines the b
 est from the Feynman tree theorem and modern unitarity-based approaches.\n
 It exists to all loop orders\, is fully constructive\, involves only on-sh
 ell trees\, and is explicitly ghost-free. This comes at the cost of\nsligh
 tly unfamiliar linear propagators\, but which can be termwise integrated u
 sing standard techniques. Based on 1509.02169.
LOCATION:Potter Room (first floor\, Pav. B)
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