Polarized structure function ${\ensuremath{\sigma}}_{L{T}^{\ensuremath{'}}}$ from ${\ensuremath{\pi}}^{0}p$ electroproduction data in the resonance region at $0.4\phantom{\rule{0.16em}{0ex}}{\mathrm{GeV}}^{2}&lt;{Q}^{2}&lt;1.0\phantom{\rule{0.16em}{0ex}}{\mathrm{GeV}}^{2}$

Letter

Polarized structure function $σ_{L T^{'}}$ from $π^{0} p$ electroproduction data in the resonance region at $0.4 {GeV}^{2} < Q^{2} < 1.0 {GeV}^{2}$

E. L. Isupov et al. (CLAS Collaboration)

Phys. Rev. C 105, L022201 – Published 18 February 2022

Abstract

The first results on the $σ_{L T^{'}}$ structure function in exclusive $π^{0} p$ electroproduction at invariant masses of the final state of $1.5 GeV < W < 1.8 GeV$ and in the range of photon virtualities $0.4 {GeV}^{2} < Q^{2} < 1.0 {GeV}^{2}$ were obtained from data on beam spin asymmetries and differential cross sections measured with the CLAS detector at Jefferson Lab. The Legendre moments determined from the $σ_{L T^{'}}$ structure function have demonstrated sensitivity to the contributions from the nucleon resonances in the second and third resonance regions. These new data on the beam spin asymmetries in $π^{0} p$ electroproduction extend the opportunities for the extraction of the nucleon resonance electro-excitation amplitudes in the mass range above 1.6 GeV.