Speaker
Arnd Behring
(KIT)
Description
I report on the calculation of the beam functions for zero-jettiness at next-to-next-to-next-to-leading order in the strong coupling constant. In the limit of vanishing zero-jettiness scattering cross sections factorise into beam, soft and hard functions as well as the leading-order cross section. Here, the beam functions describe collinear emissions off the initial state partons. If these building blocks are available they can, for example, be used to derive a slicing scheme for colour singlet production. I will present details of the calculation as well as results for beam functions.
Primary authors
Arnd Behring
(KIT)
Prof.
Kirill Melnikov
(Karlsruhe Institute of Technology)
Lorenzo Tancredi
(TUM)
Christopher Wever
(TU München)
