Soft evolution of multi-jet final states
Author(s)Gerwick, Erik; Schumann, Steffen; Höche, Stefan; Marzani, Simone
MetadataShow full item record
We present a new framework for computing resummed and matched distributions in processes with many hard QCD jets. The intricate color structure of soft gluon emission at large angles renders resummed calculations highly non-trivial in this case. We automate all ingredients necessary for the color evolution of the soft function at next-to-leading-logarithmic accuracy, namely the selection of the color bases and the projections of color operators and Born amplitudes onto those bases. Explicit results for all QCD processes with up to 2 → 5 partons are given. We also devise a new tree-level matching scheme for resummed calculations which exploits a quasi-local subtraction based on the Catani-Seymour dipole formalism. We implement both resummation and matching in the Sherpa event generator. As a proof of concept, we compute the resummed and matched transverse-thrust distribution for hadronic collisions.
DepartmentMassachusetts Institute of Technology. Center for Theoretical Physics; Massachusetts Institute of Technology. Department of Physics
Journal of High Energy Physics
Gerwick, Erik, Steffen Schumann, Stefan Höche, and Simone Marzani. “Soft Evolution of Multi-Jet Final States.” J. High Energ. Phys. 2015, no. 2 (February 2015).
Final published version