Found 3 result(s)

24.11.2017 (Friday)

King's Journal Club

Journal Club Cristian Vergu (KCL)

at:
16:15 KCL
room S4.23
abstract:

Discussion of "A spacetime derivation of the Lorentzian OPE inversion formulaā€¯ by Simmons-Duffin, Stanford and Witten. [1711.03816]

08.04.2015 (Wednesday)

Polygon Seminar: Scattering amplitudes, super-Wilson loops and their symmetries

Triangular Seminar Cristian Vergu (King's College London)

at:
15:30 KCL
room K6.29
abstract:

I will give a pedagogical introduction to recent developments in the study of N=4 super-Yang-Mills scattering amplitudes, and super-Wilson loops with a focus on their symmetries.

29.10.2014 (Wednesday)

Yangian symmetry of smooth super-Wilson loops in planar N=4 super-Yang-Mills

Regular Seminar Cristian Vergu (King's College)

at:
13:15 KCL
room G.01
abstract:

Light-like polygonal super-Wilson loops are dual to scattering amplitudes in planar N=4 super-Yang-Mills and enjoy an infinite-dimensional Yangian symmetry which extends the superconformal symmetry.  However, this symmetry is anomalous.  In this talk we will describe a super-Wilson loop on a smooth contour, which is free of UV divergences and on which the superconformal symmetry operators are not anomalous.  We also study the action of level one Yangian generators on the one-loop expectation value of this super-Wilson loop. [This is work in progress with N.Beisert, D.Muller and J.Plefka]