Year: 2015
Type: article
Abstract: 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.
Source: Journal of High Energy Physics
Language: English
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: diamond
Awards: G2371548206, G303061748, WACO TX (CITY OF) EECBG, Verbundprojekt 05H2012 - THEORIE: Theoretische Vorhersagen für Jet-Observablen am Large-Hadron-Collider (LHC), Training Network for Monte Carlo Event Generators for LHC Physics, G4654690619, LHC Theory Initiative, G5570207115, G969889393, G97770923
OpenAlex ID: W2046995575