Resummation and simulation of soft gluon effects beyond leading colour
Matthew De Angelis, Jeffrey R. Forshaw, Simon Pl\"atzer
TL;DR
This paper introduces a novel parton branching algorithm that resums soft gluon effects beyond the leading colour approximation, revealing significant contributions of colour-suppressed terms to jet veto cross sections.
Contribution
It develops an all-orders QCD resummation method that systematically includes colour-suppressed terms in high-energy collision simulations.
Findings
Colour suppressed terms significantly affect jet veto cross sections
The new algorithm extends parton shower simulations beyond leading colour
Resummation improves accuracy of high-energy collision predictions
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.
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