Polarized Semi-Inclusive Deep-Inelastic Scattering at Next-to-Next-to-Leading Order in QCD
Leonardo Bonino, T. Gehrmann, Markus Löchner, Kay Schönwald, Giovanni Stagnitto
Abstract
Semi-inclusive hadron production in longitudinally polarized deep-inelastic lepton-nucleon scattering is a powerful tool for resolving the quark flavor decomposition of the proton's spin structure. We present the full next-to-next-to-leading order QCD corrections to the coefficient functions of polarized semi-inclusive deep-inelastic scattering (SIDIS) in analytical form, enabling the use of SIDIS measurements in precision studies of the proton spin structure. The numerical impact of these corrections is illustrated by a comparison with data of polarized single-inclusive hadron spectra from the DESY HERMES and CERN COMPASS experiments.
Topics & Concepts
DESYPhysicsDeep inelastic scatteringParticle physicsQuantum chromodynamicsQuarkNuclear physicsHadronLeptonNucleonInelastic scatteringScatteringSpin structureProtonHERASpin (aerodynamics)Condensed matter physicsElectronQuantum mechanicsThermodynamicsAntiferromagnetismParticle physics theoretical and experimental studiesQuantum Chromodynamics and Particle InteractionsHigh-Energy Particle Collisions Research