Measurement of Single and Double Spin Asymmetries in Deep Inelastic Pion Electroproduction with a Longitudinally Polarized Target

Abstract

We report the first measurement of the transverse momentum dependence of double spin asymmetries in semi-inclusive production of pions in deep inelastic scattering off the longitudinally polarized proton. Data have been obtained using a polarized electron beam of 5.7 GeV with the CLAS detector at the Thomas Jefferson National Accelerator Facility (JLab). A significant non-zero $\sin 2\varphi$ single spin asymmetry was also observed for the first time indicating strong spin-orbit correlations for transversely polarized quarks in the longitudinally polarized proton. The azimuthal modulations of single spin asymmetries have been measured over a wide kinematic range.

References in corpus (9)

• Transverse Quark Spin Effects and the Flavor Dependence of the Boer-Mulders Function
• Azimuthal spin asymmetries in light-cone constituent quark models
• Transverse momentum dependent distribution functions in a covariant parton model approach with quark orbital motion
• Collins effect in semi-inclusive deeply inelastic scattering and in electron positron annihilation
• Effect of Orbital Angular Momentum on Valence-Quark Helicity Distributions
• Transverse momentum dependence of semi-inclusive pion production
• Are there approximate relations among transverse momentum dependent distribution functions?
• Transverse momentum dependence of the quark helicity distributions and the Cahn effect in double-spin asymmetry $A_{LL}$ in Semi Inclusive DIS
• Measurement of azimuthal asymmetries of the unpolarized cross section at HERMES

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