The Double Spin Asymmetry of Nitrogen in Elastic and Quasielastic Kinematics from a Solid Ammonia Dynamically Polarized Target

Abstract

Solid ammonia (NH${}_3$) is commonly used as a dynamically polarized proton target for electron and muon scattering cross-section asymmetry measurements. As spin 1${}^{+}$ particles, the ${}^{14}$N nuclei in the target are also polarized and contribute a non-trivial asymmetry background that should be addressed. We describe here a method to extract the nitrogen contribution to the asymmetry, and report the cross-section asymmetries of electron-nitrogen scattering at beam energies of $E=1.7$ GeV and $E=2.2$ GeV, and momentum transfer of $Q^2=0.023-0.080$ GeV${}^2$.

References in corpus (9)

• Measurement of the Neutron Spin Structure Function $g_1^n$ with a Polarized ^3He Target
• The Deuteron Spin-dependent Structure Function g1d and its First Moment
• Measurements of the $Q^2$-Dependence of the Proton and Neutron Spin Structure Functions g1p and g1n
• Single Spin Asymmetries in Charged Pion Production from Semi-Inclusive Deep Inelastic Scattering on a Transversely Polarized ${}^3$He Target
• Measurement of the Electric Form Factor of the Neutron at Q^2=0.5 and 1.0 (GeV/c)^2
• Implications of the discrepancy between proton form factor measurements
• First electron beam polarization measurements with a Compton polarimeter at Jefferson Laboratory
• Empirical Fit to electron-nucleus scattering
• Dynamically polarized target for the g2p and GEp experiments at Jefferson Lab