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SUMMARY:Alfredo Guevara Gonzalez (Harvard University)
DTSTART:20210310T170000Z
DTEND:20210310T180000Z
DTSTAMP:20260423T024618Z
UID:CMU-TP/30
DESCRIPTION:Title: <a href="https://researchseminars.org/talk/CMU-TP/30/">
 From QFT amplitudes to wave scattering in Kerr</a>\nby Alfredo Guevara Gon
 zalez (Harvard University) as part of Carnegie Mellon theoretical physics\
 n\n\nAbstract\nIn recent years\, a striking connection between QFT scatter
 ing amplitudes and classical black hole physics has been developed.In this
  talk we will consider the scattering of massless waves off a Kerr black h
 ole. The classical Newman-Penrose amplitudes are found to coincide with ce
 rtain QFT amplitudes at finite values of the scattering angle\, provided 1
 ) a precise classical limit is implemented on the QFT side and 2) the blac
 k hole background is modelled as an interacting matter particle with spin.
  The QFT amplitudes describe the $2\\to 2$ tree-level scattering of a heli
 city-$|h|$ particle with a massive spin-S particle\, where the spin can be
  taken arbitrarily high. We will finally discuss the application of our re
 sults to the computation of gravitational radiation in the (bounded) two-b
 ody problem.\n
LOCATION:https://researchseminars.org/talk/CMU-TP/30/
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