O. P. Sushkov

Nuclear anapole moments

Abstract An approximate analytical expression is obtained for the parity violating electromagnetic, so-called anapole, moment of a spherical nucleus. The result iis confirmed by numerical computation in the Woods-Saxon potential for the nuclei 133 Cs, 203,205 Tl, 207 Pb, 209 Bi. The effective coupling constant of the electromagnetic P -odd electron-nucleus interaction constitutes 0.3–0.4 of the Fermi constant.

Δ-formation in the 1H(3He, 3H)Δ++ reaction at intermediate energies

Abstract Data on the Δ-isobar production in the pp → n Δ ++ reaction have been analyzed, the parameter Λ of the π NN, π N Δ vertex form factors is found to be Λ = 0.63 GeV. The reaction 3 He + p → 3 H + Δ ++ is analyzed using the pp-nΔ ++ amplitude.

Summation of the high orders of perturbation theory for the parity nonconserving E1-amplitude of the 6s–7s transition in the caesium atom

Abstract Three dominating subsequences of diagrams in the correlation correction to amplitude are summed: screening of the electron-electron interaction, particle-hole interaction, and the iterations of the self-energy. The result of the calculations is E 1(6 s –7 s ) = (0.91 ± 0.01) × 10 −11 iea B (− Q w / N ), Q w is the weak charge of the nucleus, N is the number of neutrons. A recent experiment of Noecker et al. and our calculation give the following value of the Weinberg angle: sin 2 θ w =0.226±0.007 ( exp )±0.004 ( theor ).

On the P- and T-nonconserving nuclear moments

Abstract The contribution of virtual excitations of paired nucleons to T-nonconserving nuclear moments caused by T-odd nuclear forces is shown to be comparable to the contribution of the external nucleon. Taking into account the contribution of paired nucleons in the 129Xe nucleus allows one to extract from atomic experiments the best limit on the P- and T-nonconserving nucleon-nucleon interactions. This limit approaches, by its implications, the limit on the neutron dipole moment. In the case of the P-nonconserving, but T-invariant, anapole nuclear moment the external nucleons excitations dominate.

Limit on the constant of T-nonconserving nucleon-nucleon interaction

Abstract T -odd moments of the xenon, mercury and thallium nuclei, due to T -nonconserving nuclear forces, are calculated. From the measurement of the electric dipole moment (EDM) of the 129 Xe atom we extract a limit on the T -noninvariant nucleon-nucleon interaction. This limit approaches in its implications the limit on the neutron EDM.

Novel Approach to Description of Spin-Liquid Phases in Low-Dimensional Quantum Antiferromagnets

We consider quantum spin systems with dimerization, which at strong coupling have singlet ground states. To account for strong correlations, the

Correlation potential method for the calculation of energy levels, hyperfine structure and E1 transition amplitudes in atoms with one unpaired electron

S\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}1

The parity violating rotation of the neutron spin in helium

elementary excitations are described as a dilute Bose gas with infinite on-site repulsion. This approach is applied to the two-layer Heisenberg antiferromagnet at

Radiative corrections and parity nonconservation in heavy atoms.

T\phantom{\rule{0ex}{0ex}}=\phantom{\rule{0ex}{0ex}}0

Conductance anomalies in a one-dimensional quantum contact

with general couplings. Our analytic results for the triplet gap, the excitation spectrum, and the location of the quantum critical point are in excellent agreement with numerical results obtained by dimer series expansions.