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SUMMARY:Hidden Symmetries of Scattering Amplitudes in Gauge Theories and G
ravity (Quantum Spacetime Seminar Series)
DTSTART;VALUE=DATE-TIME:20180507T060000Z
DTEND;VALUE=DATE-TIME:20180507T070000Z
DTSTAMP;VALUE=DATE-TIME:20180523T151313Z
UID:indico-event-6425@cern.ch
DESCRIPTION:In this talk we discuss two instances of hidden symmetries in
four- dimensional scattering amplitudes. Firstly\, we motivate how to obta
in simple 4d integrable field theories as limits of planar twisted N=4 sup
er Yang- Mills theory. Amplitudes in these new theories are in one-to-one
correspondence with Zamolodchikov's fishnet Feynman graphs and generalizat
ions thereof. Their relation to the planar AdS/CFT duality implies that la
rge families of mostly unsolved Feynman integrals inherit a conformal Yang
ian symmetry. We then show that also tree-level scattering in ordinary Ein
stein gravity possesses a hidden conformal Lie algebra symmetry. The inspi
ration for the latter finding originates in soft limits of string theory s
cattering amplitudes. Curiously\, our formulation of this symmetry relies
on a manifestly permutation symmetric form of the graviton amplitude.\n\nh
ttps://indico.tifr.res.in/indico/conferenceDisplay.py?confId=6425
LOCATION: A 304
URL:https://indico.tifr.res.in/indico/conferenceDisplay.py?confId=6425
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