Double Spin Asymmetries of Inclusive Hadron Electroproductions from a Transversely Polarized ${}^3\mathrm{He}$ Target

Abstract

We report the measurement of beam-target double-spin asymmetries ($A_{\text{LT}}$) in the inclusive production of identified hadrons, $\vec{e}$+${}^3{\text{He}}^{\uparrow }\to h+X$, using a longitudinally polarized 5.9 GeV electron beam and a transversely polarized ${}^3\mathrm{He}$ target. Hadrons (${\pi }^{\pm }$, $K^{\pm }$ and proton) were detected at 16${}^{\circ }$ with an average momentum $<$$P_h$$>$=2.35 GeV/c and a transverse momentum ($p_T$) coverage from 0.60 to 0.68 GeV/c. Asymmetries from the ${}^3\text{He}$ target were observed to be non-zero for ${\pi }^{\pm }$ production when the target was polarized transversely in the horizontal plane. The ${\pi }^{+}$ and ${\pi }^{-}$ asymmetries have opposite signs, analogous to the behavior of $A_{\text{LT}}$ in semi-inclusive deep-inelastic scattering.

Published in PRC (92.015207), nuclear experiment, high-energy experiment

References in corpus (5)

• Spin Structure of the Nucleon - Status and Recent Results
• Single Spin Asymmetries in Charged Kaon Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized ${}^3\mathrm{He}$ Target
• Neutron single spin asymmetries from semi-inclusive deep inelastic scattering off transversely polarized ${}^3$He
• Longitudinal-transverse double-spin asymmetries in single-inclusive leptoproduction of hadrons
• The G0 Experiment: Apparatus for Parity-Violating Electron Scattering Measurements at Forward and Backward Angles

Cited by in corpus (3)

• Parton Fragmentation Functions
• Transverse spin observables in hard-scattering hadronic processes within collinear factorization
• Spin Orbit Correlations and the Structure of the Nucleon