Components of polarization-transfer to a bound proton in a deuteron measured by quasi-elastic electron scattering

Abstract

We report the first measurements of the transverse ($P_x$ and $P_y$) and longitudinal ($P_z$) components of the polarization transfer to a bound proton in the deuteron via the ${}^2\mathrm{H}(\vec{e},e^{\prime }\vec{p})$ reaction, over a wide range of missing momentum. A precise determination of the electron beam polarization reduces the systematic uncertainties on the individual components, to a level that enables a detailed comparison to a state-of-the-art calculation of the deuteron that uses free-proton electromagnetic form factors. We observe very good agreement between the measured and the calculated $P_x/P_z$ ratios, but deviations of the individual components. Our results cannot be explained by medium modified electromagnetic form factors. They point to an incomplete description of the nuclear reaction mechanism in the calculation.

References in corpus (5)

• Nucleon Electromagnetic Form Factors
• Polarization Transfer in the 4He(e,e'p)3H Reaction at Q^2 = 0.8 and 1.3 (GeV/c)^2
• Measurement of polarization-transfer to bound protons in carbon and its virtuality dependence
• Components of polarization-transfer to a bound proton in a deuteron measured by quasi-elastic electron scattering
• Polar polarization: a new method for polarimetry analysis

Cited by in corpus (9)

• Measurement of polarization-transfer to bound protons in carbon and its virtuality dependence
• Components of polarization-transfer to a bound proton in a deuteron measured by quasi-elastic electron scattering
• Polarization transfer to bound protons measured by quasi-elastic electron scattering on ${}^{12}$C
• Quasi-elastic polarization-transfer measurements on the deuteron in anti-parallel kinematics
• Comparison of recoil polarization in the ${}^{12}\mathrm{C}(\vec{e},e^{\prime }\vec{p})$ process for protons extracted from $s$ and $p$ shell
• The influence of Fermi motion on the comparison of the polarization transfer to a proton in elastic $\vec{e}p$ and quasi-elastic $\vec{e}A$ scattering
• Measurement of polarization transfer in the quasi-elastic ${}^{40}\mathrm{Ca}(\vec{e},e^{\prime }\vec{p})$ process
• Measurements of the induced polarization in the quasi-elastic $A(e,e^{\prime }\vec{p})$ process in non-coplanar kinematics
• Measurements of the electron-helicity asymmetry in the quasi-elastic $\mathrm{A}(\vec{e},e^{\prime }p)$ process