Next-to-leading-order QCD corrections to gluon fragmentation into quarkonia*
Feng Feng, Yu Jia
Abstract
Abstract Within the NRQCD factorization framework, we compute the next-to-leading-order QCD corrections to the gluon fragmentation into the Fock components of a quarkonium, at the lowest order in velocity expansion. We follow the operator definition of the fragmentation function advanced by Collins and Soper. The key technique underpinning our calculation is the sector decomposition method widely used in the area of multi-loop computation. It is found that the NLO QCD corrections have significant effects, and qualitatively modify the profiles of the corresponding leading-order fragmentation functions.
Topics & Concepts
PhysicsQuantum chromodynamicsGluonParticle physicsFragmentation (computing)Order (exchange)Nuclear physicsQuantum electrodynamicsComputer scienceEconomicsOperating systemFinanceParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsHigh-Energy Particle Collisions Research