Quantum Chromodynamics, the theory of quarks and gluons, whose interactions can be
described by a local SU (3) gauge symmetry with charges called “color quantum numbers” …

We discuss our present knowledge of α s, the fundamental running coupling or effective
charge of Quantum Chromodynamics (QCD). A precise understanding of the running of α s …

Jet substructure has emerged to play a central role at the Large Hadron Collider, where it
has provided numerous innovative ways to search for new physics and to probe the …

The International Linear Collider (ILC) is now under consideration as the next global project
in particle physics. In this report, we review of all aspects of the ILC program: the physics …

A bstract We present first analytic, resummed calculations of the rates at which wide-spread
jet substructure tools tag QCD jets. As well as considering trimming, pruning and the mass …

Parton showers are among the most widely used tools in collider physics. Despite their key
importance, none so far have been able to demonstrate accuracy beyond a basic level …

FastJet is a C++ package that provides a broad range of jet finding and analysis tools. It
includes efficient native implementations of all widely used 2→ 1 sequential recombination …

The accuracy of parton-shower simulations is often a limiting factor in the interpretation of
data from high-energy colliders. We present the first formulation of parton showers with …

A bstract Lund diagrams, a theoretical representation of the phase space within jets, have
long been used in discussing parton showers and resummations. We point out that they can …

A search for new heavy particles that decay into top-quark pairs is performed using data
collected from proton–proton collisions at a centre-of-mass energy of 13 TeV TeV by the …