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UID:757@qft.physik.hu-berlin.de
DTSTART;TZID=Europe/Berlin:20160712T143000
DTEND;TZID=Europe/Berlin:20160712T180000
DTSTAMP:20160706T100920Z
URL:https://qft.physik.hu-berlin.de/next-seminars/sfb-on-scattering-amplit
 udes/
SUMMARY:SFB lectures on Amplitudes[Mark Spradlin(Brown Univ.) & Congkao Wen
 (Univ. Roma)] - SFB lectures on Amplitudes
DESCRIPTION:PROGRAM:\n\n&nbsp\;\n\n&nbsp\;\n\n14:30 – 15:00 Kaffeepause\n
 \n15:00 – 15:30 SFB-Vollversammlung\n\n15:30 – 16:30\nProf. Dr. Marcu
 s Spradlin (Brown University) \nCluster algebras and scattering amplitudes
 \n\n\nScattering amplitudes of planar N=4 supersymmetric gauge theory are 
 functions with remarkable mathematical properties. The manifold of kinemat
 ic data for an n-particle scattering process is an example of a type of sp
 ace known as a cluster Poisson variety\, and it has been discovered that t
 here is a deep connection between amplitudes and the associated Gr(4\,n) G
 rassmannian cluster algebra. I will review various aspects of this connect
 ion and show how exploiting these mathematical properties can greatly aid 
 the computation of previously unknown amplitudes.\n\n\n&nbsp\;\n\n16:30 
 – 17:00 Kaffeepause\n\n17:00 – 18:00\nDr. Congkao Wen (Universita di R
 oma ) \nConstraining effective actions via scattering amplitudes\n\nI will
  discuss how the consistent conditions arising from scattering amplitudes 
 can be utilized for constraining low-energy effective actions. In particul
 ar in this talk I will focus on the effective action of N=4 super Yang-Mil
 ls theory in the Coulomb branch. The constraints from supersymmetry as wel
 l as (broken) conformal symmetry allow us to obtain new non-renormalizatio
 n theorems. I will also discuss scale invariance v.s. conformal symmetry i
 n this context.
CATEGORIES:Research Seminars
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