Logarithmic accuracy of angular-ordered parton showers
Gavin Bewick, Silvia Ferrario Ravasio, Peter Richardson, Michael H. Seymour
Abstract
We study the logarithmic accuracy of angular-ordered parton showers by considering the singular limits of multiple emission matrix elements. This allows us to consider different choices for the evolution variable and propose a new choice which has both the correct logarithmic behaviour and improved performance away from the singular regions. In particular the description of e<sup>+</sup>e<sup>−</sup> event shapes in the non-logarithmic region is significantly improved.
Topics & Concepts
PhysicsPartonLogarithmParticle physicsEvent (particle physics)Matrix (chemical analysis)Logarithmic growthVariable (mathematics)QuarkMathematical analysisQuantum mechanicsComposite materialMathematicsMaterials scienceParticle physics theoretical and experimental studiesHigh-Energy Particle Collisions ResearchQuantum Chromodynamics and Particle Interactions