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UID:1282@qft.physik.hu-berlin.de
DTSTART;TZID=Europe/Berlin:20190503T133000
DTEND;TZID=Europe/Berlin:20190503T143000
DTSTAMP:20190430T124213Z
URL:https://qft.physik.hu-berlin.de/next-seminars/justin-vines-aei-golm/
SUMMARY:Justin Vines\, AEI Golm - 
DESCRIPTION:J. Vines\, AEI\n\nTitle: "Elastic scattering of spinning black 
 holes at one-loop order: progress and questions"\n\nAbstract: a growing 
 research program seeks to obtain new results concerning the classical gra
 vitational dynamics of black holes from advanced techniques for computing
  scattering amplitudes in quantum field theories.  At least perturbative
 ly\, a non-spinning black hole is well described by an effective point-pa
 rticle worldline action coupled with the Hilbert action\, and it is well 
 established that this corresponds to a classical limit of a massive scala
 r field/particle minimally coupled to the graviton.  Spinning black hole
 s seem to similarly correspond to higher-spin (indeed infinite-spin) mass
 ive fields/particles.  I will discuss the nature of this observed but un
 explained correspondence and the evidence for it\, pointing out the curre
 nt frontiers of understanding.\n\nCertain "minimally coupled" amplitudes f
 or higher-spin massive particles exchanging gravitons can be matched to r
 esults from classical spinning-black-hole effective actions (matched to t
 he Kerr solution)\, finding remarkable agreement for arbitrary (infinite)
  spins at tree level and for lower spins at one-loop order.  However\, a
 t current understanding\, ambiguities arise on both sides of the correspo
 ndence for sufficiently high spins at one-loop order\, in the form of yet
  undetermined Wilson coefficients.  The exploration of these and related
  issues presents rich opportunities for cross-pollination of ideas and te
 chniques between the fields of amplitudes and classical gravity.\n\n&nbsp
 \;\n\n&nbsp\;
CATEGORIES:Pizza Seminars
LOCATION:Room 2'07\, IRIS Building\, Zum großen Windkanal 6\, Berlin\, Ger
 many
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 2.43349,13.531590000000051
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DTSTART:20190331T030000
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