Analysis of P- and T-violation effects in Experiment with Polarized Neutron Propagation through Two Polarized Targets

The NOPTREX collaboration is developing several experimental schemes to measure P- and T-violating effects in propagation of polarized neutron beam through a polarized target. As it was shown in [1], P- and T-violating effects are enhanced in a vicinity of a p-resonance by 5 -- 6 orders of magnitude. We analyze an experimental scheme with a polarized $^{\mathrm{139}}$La target split along the beam direction, polarized in opposite directions along the x-axis, with a magnetic field precession coil in between to precess the neutron polarization by 180$^{\mathrm{o}}$. Using technique introduced in [2], we analyze the peak value of the asymmetry and its dependence on neutron energy. To compare this separated-target experimental scheme to other possible ways to measure P- and T-violation proposed in [3], [4], we estimate relative error of the measured experimental effect and several systematic errors. \begin{enumerate} \item V. Bunakov V. Gudkov, Z. Phys. A, v.308, 1982, p. 363. \item R. Golub, S.K. Lamoreaux, Phys. Rev. D, 50, 9, 1994. \item V.R. Skoy, Phys. Rev. D, 53, 7, 1996 \item A.P. Serebrov, JETP Lett., 58, 14, 1993 \end{enumerate}