Collins effect in semi-inclusive deeply inelastic scattering and in electron positron annihilation

Abstract

The Collins fragmentation function is extracted from HERMES data on azimuthal single spin asymmetries in semi-inclusive deeply inelastic scattering, and BELLE data on azimuthal asymmetries in electron positron annihilations. A Gaussian model is assumed for the distribution of transverse parton momenta and predictions are used from the chiral quark-soliton model for the transversity distribution function. We find that the HERMES and BELLE data yield a consistent picture of the Collins fragmentation function which is compatible with COMPASS data and the information previously obtained from an analysis of DELPHI data. Estimates for future experiments are made.

13 pages, 11 figures. v2: Clarifications added, matches published version

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• What exactly is a parton density?
• A Method to Polarize Stored Antiprotons to a High Degree
• Transversity distribution function in hard scattering of polarized protons and antiprotons in the PAX experiment
• Azimuthal single spin asymmetries in SIDIS in the light of chiral symmetry breaking

Cited by in corpus (14)

• Measurement of Azimuthal Asymmetries in Inclusive Production of Hadron Pairs in e+e- Annihilation at \sqrt{s} = 10.58 GeV
• Collins Fragmentation and the Single Transverse Spin Asymmetry
• Azimuthal spin asymmetries in light-cone constituent quark models
• Angular dependences in inclusive two-hadron production at BELLE
• Collins fragmentation function for pions and kaons in a spectator model
• Partonic Pole Matrix Elements for Fragmentation
• Transverse momentum dependent distribution functions in a covariant parton model approach with quark orbital motion
• Are there approximate relations among transverse momentum dependent distribution functions?
• Light-cone divergence in twist-3 correlation functions
• Collins Asymmetry at Hadron Colliders
• $\cos 2\varphi$ asymmetries in unpolarized semi-inclusive DIS
• Single Spin Asymmetry in Inclusive Hadron Production in pp Scattering from Collins Mechanism
• Sivers and Collins Single Spin Asymmetries
• Recent developments in nucleon spin structure with focus on h_{1L}^{\perp} and pretzelosity h_{1T}^\perp