Measurement of neutron and proton analyzing powers on $C$, $CH$, $C{H}_2$ and $Cu$ targets in the momentum region 3-4.2 GeV/c

Abstract

The analyzing powers for proton elastic scattering ($\vec{p}A\to pX$) and neutron charge exchange ($\vec{n}A\to pX$) reactions on nuclei have been measured on $C$, $CH$, $C{H}_2$ and $Cu$ targets at incident neutron momenta 3.0 - 4.2 GeV/c by detecting one charged particle in forward direction. The polarized neutron measurements are the first of their kind. The experiment was performed using the Nuclotron accelerator in JINR Dubna, where polarized neutrons and protons were obtained from breakup of a polarized deuteron beam which has a maximum momentum of 13 GeV/c. The polarimeter ALPOM2 was used to obtain the analyzing power dependence on the transverse momentum of the final-state nucleon. These data have been used to estimate the figure of merit of a proposed experiment at Jefferson Laboratory to measure the recoiling neutron polarization in the quasi-elastic ${}^{2}H(\vec{e},e^{\prime }\vec{n})$ reaction, which yields information on the charge and magnetic elastic form factors of the neutron.

arXiv comment14 pages and 19 figures

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• Search for effects beyond the Born approximation in polarization transfer observables in $\vec{e}p$ elastic scattering
• Measurements of the neutron electric to magnetic form factor ratio GEn/GMn via the ^2H(\vec{e},e'\vec{n})^1H reaction to Q^2 = 1.45 (GeV/c)^2
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Cited by in corpus (3)

• Diquark Correlations in Hadron Physics: Origin, Impact and Evidence
• Polarization transfer in ${\vec{e}}^{+}p\to e^{+}\vec{p}$ scattering using the Super BigBite Spectrometer
• Spin Physics Detector at NICA