On the possibility to measure the imaginary part of the spin-dependent amplitude of zero-angle coherent elastic scattering in a spin-filter experiment with an unpolarized proton beam interacting with a polarized deuterium target

”Optical” spin rotation phenomenon and spin-filtering of antiproton beams in a nuclear pseudomagnetic field

“…Several types of experiments for the investigation of deuteron spin dichroism (imaginary part of the spin dependent amplitude) were considered briefly. One of them is measurement of dichroism in a spin-filtering experiment by changing the tensor polarization of the deuterium target [2], [3]. According to our estimate, this type of experiment can be carried out at COSY and at GSI.…”

“…by measuring the lifetime of the unpolarized beam passing through a polarized internal target [2]. Direct measurement of the tensor part of the deuteron-proton interaction can be performed by measuring the lifetime of the unpolarized proton beam passing through a tensor polarized deuterium target [3]. The influence of high-frequency (g-2) spin precession in a ring is one of the problems that we encounter in spin rotation measurements in a storage ring.…”

"Optical" Spin Rotation Phenomenon and Spin Filtering of Antiproton (Proton, Deuteron) Beams in a Pseudomagnetic Field of a Polarized Target: the Possibility of Measuring the Real Part of the Coherent Zero-angle Scattering Amplitude

“…In view of (20), the absorption of unpolarized ( P 0 = 0) antiprotons (protons) rotating in the ring (absorption of particle transmitted through the target) will be different for different orientations of the quadrupolarization tensor of the deuteron target, i.e., the lifetime of a nonpolarized beam in the ring depends on the orientation of the quadrupolarization tensor of the target [38]. As a result, measuring the beam lifetime in this case, one can determine ImA 3 , i.e., a spin-dependent part of the total cross-section of proton (antiproton) scattering by a polarized deuteron, which is proportional to Q zz .…”