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UID:490@qft.physik.hu-berlin.de
DTSTART;TZID=Europe/Berlin:20141114T130000
DTEND;TZID=Europe/Berlin:20141114T140000
DTSTAMP:20141113T101407Z
URL:https://qft.physik.hu-berlin.de/next-seminars/nils-kanning-hu-berlin-2
 /
SUMMARY:Nils Kanning\, HU Berlin - Graßmannian integral for non-compact os
 cillator Yangian invariants
DESCRIPTION:Graßmannian integral for non-compact oscillator Yangian invari
 ants\n\nAbstract:\n\nRecently there has been much progress in the understa
 nding of\n(deformed) tree-level scattering amplitudes of N=4 super Yang-Mi
 lls\ntheory. These amplitudes are invariant under the Yangian of psu(2\,2|
 4)\nand they can be formulated in terms of Graßmannian integrals. We show
 \nthat\, after introducing a crucial new ingredient\, this formulation can
 \nalso be applied to Yangian invariants for oscillator representations of\
 nthe non-compact algebra u(p\,q). We discuss sample invariants including\,
 \nin particular\, the analogue of the u(p\,q) R-matrix. Excitingly\, our\n
 formulation allows us to identify one class of Yangian invariants with\npa
 rtition functions of unitary matrix models.
CATEGORIES:Pizza Seminars
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DTSTART:20141026T020000
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