[en] Siegert's theorem, in which the amplitude of a one-photon process on a nucleus is expressed in terms of the generalized electric and magnetic dipole moments of the nucleus, is generalized without resorting to the traditional subdivision of the electromagnetic current of the nucleus into a convection current, associated with the motion of the nucleus as a whole, and an internal current

[en] A recently completed neutron beam experiment is described which sets the limit onμsub(E) the neutron electric dipole moment of |μsub(E)/e <3 x 10^-24cm. A new experiment with bottled cold neutrons has been started and should eventually provide a much lower limit. The effectiveness of the bottled neutron technique is demonstrated by the recent success of an independently conceived experiment of this nature by Altarev, et al sup([¹,²]) which sets a new limit on a μsub(E)/e a factor of two below that given above. The original apparatus has recently been used to measure the ratio μsub(n)/μsub(p) of the magnetic moment of the neutron to that of proton with the result μsub(n)/μsub(p)=-0.68497945(17). A new apparatus is being planned to measure the parity violating small rotation of the neutron spin due to the weak interaction when the neutron passes through a material such as Bi or Sn. A still larger rotation may be studied when the molecules of the medium are optically active (cork screw shaped). (author)

[en] In this review we trace the evolution of the three muon (g-2) experiments which have played a considerable role in the history of CERN. In doing so, our discussion of the measurements is by no means comprehensive since full reports have already been published elsewhere. Instead we have endeavoured to place each in its physics context and to point out the technical developments that were necessary to achieve the succeeding steps in precision. (orig.)

[en] A one loop gauged unparticles contribution to the anomalous neutrino magnetic and electric dipole moments is presented and a prescription is proposed

[en] This paper reviews the theoretical predictions for and the experimental measurements of the anomalous magnetic and electric dipole moments of the tau lepton. In particular, recent analyses of the e⁺e^- → τ⁺τ^-γ process from the L3 and OPAL collaborations are described. The most precise results, from L3, for the anomalous magnetic and electric dipole moments respectively are: a_τ = 0.004 ± 0.027 ± 0.023 and d_τ = (0.0 ± 1.5 ± 1.3) x 10^-16e·cm

[en] We establish constraints on a general four-fermion contact interaction from precise measurements of electroweak parameters. We compute the one-loop contribution for the leptonic Z width, anomalous magnetic, weak-magnetic, electric and weak dipole moments of leptons in order to extract bounds on the energy scale of these effective interactions. (author)

[en] The electric and the magnetic moments are discussed for the bound system of a charged fermion and an Abelian dyon with electric charge Z_d< Z_d^c and for total angular momentum j≥|q|+1/2. The non-vanishing electric dipole moment is found. (author)

[en] We show that transverse and normal single-tau polarization of tau pairs produced at e⁺ e^- unpolarized collisions, at the Z peak, are sensitive to weak (magnetic and electric) dipole moments of the tau. We also show how these components of the τ polarization are accessible by measuring appropriate azimuthal asymmetries in the angular distribution of its decay products. Sensitivities of the order of 10^-18 e · cm, for the weak-electric dipole moment, and 10^-4 (10^-3), for the real (imaginary) part of the weak-magnetic dipole moment of τ, may be achieved. Compatible bounds are also presented from spin-spin correlated asymmetries

[en] For several years the quesation was under dicussion of an electric dipole moment acquired by a magnetic dipole moving in a medium. Now it is accepted that for the relation between the magnetic and electric moment in a medium the same relativistic formula as for a magnetic dipole moving in a vacuum can be used. Consideration undertaken in this paper of a closed current loop moving in a vacuum contains and additional argument in favor of the above statement. In the limit case this loop is equivalent to a moving magnetic dipole. The comparison of the obtained results with the known data concerning the electric dipole has shown that in the case of medium there are no reasons whatsoever to change relativistic transformation formulas. 5 refs.; 1 fig

[en] We analyze the neutron electric dipole moment (EDM) in the minimal supersymmetric standard model with explicit R-parity violating terms. The leading contribution to the EDM occurs at the two-loop level and is dominated by the chromoelectric dipole moments of quarks, assuming there is no tree-level mixings between sleptons and Higgs bosons or between leptons and gauginos. Based on the experimental constraint on the neutron EDM, we set limits on the imaginary parts of complex couplings λ_ijk' and λ_ijk due to the virtual b loop or τ loop