Resummation and simulation of soft gluon effects beyond leading colour

Abstract

We present first results of resumming soft gluon effects in a simulation of high energy collisions beyond the leading-colour approximation. We work to all orders in QCD perturbation theory using a new parton branching algorithm. This amplitude evolution algorithm resembles a parton shower that is able to systematically include colour-suppressed terms. We find that colour suppressed terms can significantly contribute to jet veto cross sections.

arXiv comment7 pages, 7 figures; update to plots after bugfix, minor changes to formulations; no qualitative change

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• Numerical resummation at subleading color in the strongly ordered soft gluon limit
• Improvements on dipole shower colour
• The role of colour flows in matrix element computations and Monte Carlo simulations
• Two-loop anomalous dimension for the resummation of non-global observables
• Resummation of Next-to-Leading Non-Global Logarithms at the LHC
• Disentangling soft and collinear effects in QCD parton showers
• Factorization of Non-Global LHC Observables and Resummation of Super-Leading Logarithms
• Colour Evolution and Infrared Physics
• Rings and strings: a basis for understanding subleading colour and QCD coherence beyond the two-jet limit
• Glauber Phases in Non-Global LHC Observables: Resummation for Quark-Initiated Processes
• Soft QCD Effects in VBS/VBF Topologies
• Wigner 6j symbols for SU(N): Symbols with at least two quark-lines
• Non-global logarithms up to four loops at finite-N${}_c$ for V/H+jet processes at hadron colliders
• Wigner 6j symbols with gluon lines: completing the set of 6j symbols required for color decomposition
• A new approach to color-coherent parton evolution
• Multivariable evolution in final state parton shower algorithms
• Designing Observables for Quantum Interference in Jets at Subleading Color
• Hemisphere mass up to four-loops with generalised $k_t$ algorithms
• Towards Colour Flow Evolution at Two Loops
• Coloring mixed QCD/QED evolution