Next to Leading Order Semi-inclusive Spin Asymmetries

Abstract

We have computed semi-inclusive spin asymmetries for proton and deuteron targets including next to leading order (NLO) QCD corrections and contributions coming from the target fragmentation region. These corrections have been estimated using NLO fragmentation functions, parton distributions and also a model for spin dependent fracture functions which is proposed here. We have found that NLO corrections are small but non-negligible in a scheme where gluons are polarised and that our estimate for target fragmentation effects does not modify significantly charged asymmetries but affects the so called difference asymmetries.

Latex, 14 pages, 6 figures in 4 Postcript files

References in corpus (7)

• Next-to-Leading Order Radiative Parton Model Analysis of Polarized Deep Inelastic Scattering
• Polarized Parton Distributions in the Nucleon
• Pion and Kaon Production in $e^{+}{e}^{-}$ and $ep$ Collisions at Next-to-Leading Order
• One-Particle Inclusive Processes in Deeply Inelastic Lepton-Nucleon Scattering
• Factorization in Semi-Inclusive Polarized Deep Inelastic Scattering
• $\mathcal{O}({\alpha }_s)$ Spin-Dependent Weak Structure Functions
• Scale Dependence of Polarized DIS Asymmetries

Cited by in corpus (12)

• Phenomenology of Forward Hadrons in DIS: Fracture Functions and its $Q^2$ Evolution
• The Spin Structure of the Nucleon
• Towards a global analysis of polarized parton distributions
• Inclusive and Semi-Inclusive Polarized DIS Data Revisited
• Next-to-Leading Order Analysis of Inclusive and Semi-inclusive Polarized Data
• NLO QCD procedure of the semi-inclusive deep inelastic scattering data analysis with respect to the light quark polarized sea
• Testing Target Independence of the `Proton Spin' Effect in Semi-Inclusive Deep Inelastic Scattering
• Global analysis of polarized DIS & SIDIS data with improved small-$x$ helicity evolution
• A Strategy for the Analysis of Semi-Inclusive Deep Inelastic Scattering
• Spin Physics
• The `Proton Spin' Effect - Theoretical Status '97
• Semi-inclusive π^\pm production - tests for independent fragmentation and for polarized quark densities