Collins effect and single spin azimuthal asymmetries in the HERMES and COMPASS experiments

Abstract

Predictions are made for single spin azimuthal asymmetries due to the Collins effect in pion production from semi-inclusive deeply inelastic scattering off transversely and longitudinally polarized targets for the HERMES and COMPASS experiments. The x-dependence of the asymmetries is evaluated using the parton distribution functions from the chiral quark-soliton model. The overall normalization of the predicted asymmetries is determined by the information on the Collins fragmentation function extracted from previous HERMES data on azimuthal asymmetries from a longitudinally polarized target. The single spin asymmetries from the transversely polarized proton target are found to be about 20% for positive and neutral pions both at HERMES and COMPASS. For a longitudinally polarized target we obtain for COMPASS a sin(phi) asymmetry of 1% and a sin(2phi) asymmetry of about 3%.

arXiv comment10 pages, 9 figures, Ref.[29] added

References in corpus (41)

• Fragmentation of Transversely Polarized Quarks Probed in Transverse Momentum Distributions
• Leading-twist Single-transverse-spin asymmetries: Drell-Yan and Deep-Inelastic Scattering
• Time-reversal odd distribution functions in leptoproduction
• Final-State Interactions and Single-Spin Asymmetries in Semi-Inclusive Deep Inelastic Scattering
• The complete tree-level result up to order $1/Q$ for polarized deep-inelastic leptoproduction
• Final state interactions and gauge invariant parton distributions
• Universality of T-odd effects in single spin and azimuthal asymmetries
• Baryons as non-topological chiral solitons
• Instantons at work
• Observation of a Single-Spin Azimuthal Asymmetry in Semi-Inclusive Pion Electro-Production
• Positivity Constraints for Spin-Dependent Parton Distributions
• Single spin asymmetry for $p^{\uparrow }p\to \pi X$ in perturbative QCD
• Nucleon Parton Distributions at Low Normalization Point in the Large N_c Limit
• Single-spin Azimuthal Asymmetries in Electroproduction of Neutral Pions in Semi-inclusive Deep-inelastic Scattering
• Unpolarized and polarized quark distributions in the large-Nc limit
• Hadronic matrix elements of gluon operators in the instanton vacuum
• Measurement of Beam-Spin Asymmetries for Deep Inelastic ${\pi }^{+}$ Electroproduction
• What exactly is a parton density?
• Measurement of single-spin azimuthal asymmetries in semi-inclusive electroproduction of pions and kaons on a longitudinally polarised deuterium target
• Novel Transversity Properties in Semi-Inclusive Deep Inelastic Scattering
• Transverse Spin Distribution Function of Nucleon in Chiral Theory
• Azimuthal asymmetries at CLAS: Extraction of e^a(x) and prediction of A_{UL}
• Sudakov suppression in azimuthal spin asymmetries
• Estimate of the Collins fragmentation function in a chiral invariant approach
• Azimuthal asymmetry in electro-production of neutral pions in SIDIS
• Single-spin Azimuthal Asymmetries in the ``Reduced Twist-3 Approximation''
• Sivers vs. Collins effect in azimuthal single spin asymmetries in pion production in SIDIS
• Predictions for azimuthal asymmetries in pion and kaon production in SIDIS off a longitudinally polarized deuterium target at HERMES
• Reanalysis of Azimuthal Spin Asymmetries of Meson Electroproduction
• Sum rules for the T-odd fragmentation functions
• On the azimuthal asymmetries in DIS
• Transversity Distribution and Polarized Fragmentation Function from Semi-inclusive Pion Electroproduction
• Study of T-odd Quark Fragmentation Function in $Z^0\to 2$-jet Decay
• Spin effects in the fragmentation of a transversely polarized quark
• On the twist-3 contribution to h_L in the instanton vacuum
• Single Hadronic-Spin Asymmetries in Weak Interaction Processes
• Nucleons as chiral solitons
• On the T-Odd Quark Fragmentation Function and on Transversal Handedness
• T-odd quark distributions: QCD versus chiral models
• Chiral-Odd Structure Function h_1^D(x) and Tensor Charge of the Deuteron
• Self-consistent calculation of parton distributions at low normalization point in the chiral quark-soliton model

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• Single-spin asymmetries in semi-inclusive deep-inelastic scattering on a transversely polarized hydrogen target
• First Measurement of the Transverse Spin Asymmetries of the Deuteron in Semi-Inclusive Deep Inelastic Scattering
• Parameterization of the quark-quark correlator of a spin-1/2 hadron
• Azimuthal spin asymmetries in light-cone constituent quark models
• Sivers and Boer-Mulders functions in Light-Cone Quark Models
• Collins effect in semi-inclusive deeply inelastic scattering and in electron positron annihilation
• Transverse momentum dependent distribution functions in a covariant parton model approach with quark orbital motion
• Pretzelosity distribution function h_1T^perp and the single spin asymmetry A_UT^sin(3phi-phi_S)
• New observables in longitudinal single-spin asymmetries in semi-inclusive DIS
• Subleading-twist effects in single-spin asymmetries in semi-inclusive deep-inelastic scattering on a longitudinally polarized hydrogen target
• Are there approximate relations among transverse momentum dependent distribution functions?
• Azimuthal single spin asymmetries in SIDIS in the light of chiral symmetry breaking
• Single-spin asymmetries in electroproduction of pions on the longitudinally polarized nucleon targets
• Transversity distribution in spin asymmetries in semi-inclusive DIS and in the Drell-Yan process
• Spin Orbit Correlations and the Structure of the Nucleon
• Nuclear dependences of azimuthal asymmetries in the Drell-Yan process
• Q^2 dependence of azimuthal asymmetries in semi-inclusive deep inelastic scattering and in Drell-Yan
• Recent developments in nucleon spin structure with focus on h_{1L}^{\perp} and pretzelosity h_{1T}^\perp