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SUMMARY:Tree-Level S-Matrices: from Einstein to Yang-Mills\, Born-Infeld\,
  and More - Ellis Yuan (Perimeter Institute) 
DTSTART:20150203T160000Z
DTEND:20150203T170000Z
UID:TALK57042@talks.cam.ac.uk
CONTACT:Tim Adamo
DESCRIPTION:In this talk I am going to discuss our recent and on-going wor
 k on an integral representation of tree-level S-matrices for massless part
 icles. Starting from the formula for gravity amplitudes\, I will introduce
  three operations acting on the integrand that produce compact and closed 
 formulas for amplitudes in various other theories of massless bosons. In p
 articular these includes Yang-Mills coupled to gravity\, (Dirac)-Born-Infe
 ld\, U(N) non-linear sigma model\, and Galileon theory. The main reference
 s are arXiv:1409.8256\, arXiv:1412.3479.
LOCATION:DAMTP\, room MR11
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