Search for T-invariance violation in pd-scattering

Abstract

Abstract. Scattering of protons with transversal polarization P p y on deuterons with tensor polarization P xz provides a null-test signal for time reversal invariance violating but Pparity conserving effects. The dedicated experiment will be done at COSY facility at proton beam energy 135 MeV using internal deuteron target. I give a brief review of results of theoretical calculations of the null-test observable within the spin-dependent Glauber theory at beam energies 100-1000 MeV considering phenomenological T-violating Pconserving NN-interactions.

Low-energy spin-physics experiments with polarized beams and targets at the COSY storage ring

“…The measurement of such a p d total cross section in a transmission experiment with an external beam is much less efficient with respect to a storage ring, given the loss in statistics in a single pass configuration. In addition, in a storage ring, one can measure the total cross section simply by measuring the lifetime of the beam as it passes through the target [20][21][22].…”

Standard model contribution to the electric dipole moment of the deuteron, 3H, and 3He nuclei

“…Recently, the measurement of Tviolating neutron scattering using the spallation neutron source is being prepared at Oak Ridge National Laboratory Laboratory and at J-PARC. Quantitative theoretical studies of the CP violating neutron scattering off nuclear target have also begun, starting from the simplest neutron-deuteron system [201][202][203]. Here the SM contribution will also be an important systematics which have to be controlled.…”

Search for time-reversal-invariance violation in double polarized antiproton-deuteron scattering

“…It provides a null-test signal for TVPC effects [4] and it will be measured in pd scattering at 135 MeV [3]. Theoretical studies of the energy dependence of the expected signal were performed at energies of the planned experiment [5][6][7][8][9][10][11][12] on the basis of the spin-dependent Glauber theory and demonstrate several unexpected effects. Among them are (i) the absense of the contribution from the lowest-mass meson-exchange (ρ meson) in the TVPC NN interaction, caused by its specific isospin, spin and momentum dependence; (ii) a strong impact of the deuteron D-wave on the null-test signal due to a destructive interference between the S -and D-wave contributions, even for zero transferred 3momentum; (iii) oscillating behaviour of the null-test signal as a function of the beam energy, i.e.…”