Found 7 result(s)
Regular Seminar Paul Heslop (Durham)
at: 14:00 room G.O. Jones 610  abstract: We will show how to obtain halfBPS fourpoint correlation functions in N=4 SYM at up to 3 loops using symmetries, analytic properties the Wilson loop/correlator duality, planarity and some minimal knowledge of the OPE structure relating fourpoint correlators of different charges. These can be used to verify recent predictions for OPE coefficients arising from integrability. 
Regular Seminar Paul Heslop (Durham University)
at: 14:00 room Room 208  abstract: Abstract: There has been much progress in understanding the fourpoint correlator of Stress Energy multiplets in N=4 SYM recently. I will discuss recent progress in evaluating high loop Feynman integrals using leading singularities, asymptotics and the symbol. This is used to evaluate the threeloop fourpoint correlation function from its integrand. Then I will show how the full (parity even and odd) 5point amplitude can be found from the same fourpoint correlator integrand. 
Regular Seminar Paul Heslop (Durham)
at: 14:00 room 602  abstract: I will review weakweak dualities relating scattering amplitudes to Wilson loops on the one hand and correlation functions of gauge invariant operators on the other. The Wilson loop / amplitude duality has lead to both numerical and analytic results for MHV scattering amplitudes at twoloops and beyond, including the determination of two loop MHV npoint scattering amplitudes for any n in a certain kinematical regime. The duality with correlation functions has been extended to all scattering amplitudes in the theory and we give explicit examples illustrating this. 
Regular Seminar Paul Heslop (Queen Mary)
at: 14:00 room H503  abstract: We introduce the Wilson loop/amplitude duality, which states that certain gluon amplitudes in N=4 SYM are equivalent to lightlike polygonal Wilson loops. We will illustrate the duality's power by computing the one loop Wilson loop analytically (matching with the known amplitudes) and then the two loop Wilson loop numerically for any number of edges. If the duality continues to hold we can thus compute two loop MHV amplitudes for any number of incoming particles. In the second part of the talk we discuss the recently conjectured new symmetry dual superconformal symmetry of the complete Smatrix of N=4 SYM. We prove its presence at treelevel and find new constraints it puts on the one loop amplitude. 
Regular Seminar Paul Heslop (QMUL)
at: 14:00 room 112  abstract:

Regular Seminar Paul Heslop (DAMTP)
at: 13:15 room 423  abstract:
