Hiren Kakkad (AGH): A new Wilson Line based action for gluodynamics

Friday Mar 26, 2021, 10:15 AM → 11:00 AM Europe/Warsaw

Abstract:

Scattering amplitudes, in particular pure gluonic amplitudes, are a crucial ingredient of any perturbative calculation in QCD. By now it is well understood that the elementary triple and four-gluon interactions are not the most effective building blocks of an amplitude. We derive a new classical action which does not involve any triple-gluon vertices by performing a canonical transformation of fields in the Yang-Mills action in the light-cone gauge. The lowest order vertex is the four-point maximally helicity violating (MHV) vertex. The action also includes higher point vertices with other helicity content. Presence of high multiplicity vertices allows for more efficient reconstruction of scattering amplitudes as compared to the standard Yang-Mills action. The new action was used to compute several tree-level amplitudes, up to 8-point next-to-next-to-MHV amplitude, and was found to be in agreement with the standard methods.

Important: This seminar is remote only due to the COVID-19 regulations

26032021-HirenKakkad-WilsonLine.pdf