New approach to QCD final-state evolution in processes with massive partons
Benoît Assi, Stefan Höche
Abstract
We present an algorithm for massive parton evolution which is based on the differentially accurate simulation of soft-gluon radiation by means of a nontrivial azimuthal angle dependence of the splitting functions. The kinematics mapping is chosen such as to reflect the symmetry of the final state in soft-gluon radiation and collinear splitting processes. We compute the counterterms needed for a fully differential next-to-leading order matching and discuss the analytic structure of the parton shower in the next-to-leading logarithmic limit. We implement the new algorithm in the numerical code Alaric and present a first comparison to experimental data. Published by the American Physical Society 2024
Topics & Concepts
PartonPhysicsParton showerGluonQuantum chromodynamicsLogarithmParticle physicsPerturbative QCDAzimuthMatching (statistics)State (computer science)Symmetry (geometry)Statistical physicsAlgorithmMathematicsMathematical analysisGeometryStatisticsAstronomyParticle physics theoretical and experimental studiesHigh-Energy Particle Collisions ResearchQuantum Chromodynamics and Particle Interactions