Phys. Rev. Lett. 113, 232505 (2014) We present a precise measurement of double-polarization asymmetries in the
$^3\vec{\mathrm{He}}(\vec{\mathrm{e}},\mathrm{e}'\mathrm{d})$ reaction. This
particular ...process is a uniquely sensitive probe of hadron dynamics in
$^3\mathrm{He}$ and the structure of the underlying electromagnetic currents.
The measurements have been performed in and around quasi-elastic kinematics at
$Q^2 = 0.25\,(\mathrm{GeV}/c)^2$ for missing momenta up to
$270\,\mathrm{MeV}/c$. The asymmetries are in fair agreement with the
state-of-the-art calculations in terms of their functional dependencies on
$p_\mathrm{m}$ and $\omega$, but are systematically offset. Beyond the region
of the quasi-elastic peak, the discrepancies become even more pronounced. Thus,
our measurements have been able to reveal deficiencies in the most
sophisticated calculations of the three-body nuclear system, and indicate that
further refinement in the treatment of their two- and/or three-body dynamics is
required.
We report on a precise measurement of double-polarization asymmetries in electron-induced breakup of \(^3\mathrm{He}\) proceeding to \(\mathrm{pd}\) and \(\mathrm{ppn}\) final states, performed in ...quasi-elastic kinematics at \(Q^2 = 0.25\,(\mathrm{GeV}/c)^2\) for missing momenta up to \(250\,\mathrm{MeV}/c\). These observables represent highly sensitive tools to investigate the electromagnetic and spin structure of \(^3\mathrm{He}\) and the relative importance of two- and three-body effects involved in the breakup reaction dynamics. The measured asymmetries cannot be satisfactorily reproduced by state-of-the-art calculations of \(^3\mathrm{He}\) unless their three-body segment is adjusted, indicating that the spin-dependent part of the nuclear interaction governing the three-body breakup process is much smaller than previously thought.
We present a precise measurement of double-polarization asymmetries in the \(^3\vec{\mathrm{He}}(\vec{\mathrm{e}},\mathrm{e}'\mathrm{d})\) reaction. This particular process is a uniquely sensitive ...probe of hadron dynamics in \(^3\mathrm{He}\) and the structure of the underlying electromagnetic currents. The measurements have been performed in and around quasi-elastic kinematics at \(Q^2 = 0.25\,(\mathrm{GeV}/c)^2\) for missing momenta up to \(270\,\mathrm{MeV}/c\). The asymmetries are in fair agreement with the state-of-the-art calculations in terms of their functional dependencies on \(p_\mathrm{m}\) and \(\omega\), but are systematically offset. Beyond the region of the quasi-elastic peak, the discrepancies become even more pronounced. Thus, our measurements have been able to reveal deficiencies in the most sophisticated calculations of the three-body nuclear system, and indicate that further refinement in the treatment of their two- and/or three-body dynamics is required.
