A semi-empirical ratio method for the calculation of parity non-conservation in caesium

Hartley, A C; Sandars, P. G. H.

doi:10.1088/0953-4075/23/15/029

Cited by 6 publications

(3 citation statements)

References 9 publications

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“…This type of calculation has been performed by several groups (e.g. Mirtensson-Pendrill 1985a, Johnson et a1 1986, Dzuba et a1 1987a, b, Hartley 1989, Hartley and Sandars 1990a giving consistent results. We see that the final result is dominated by the zero-order value but that important contributions arise, in particular from the PNC H F contributions (illustrated by figure l(b)).…”

Section: Dzuba Er Al (1989a)mentioning

confidence: 68%

Parity non-conservation and electric dipole moments in caesium and thallium

Hartley

Lindroth

Pendrill

1990

J. Phys. B: At. Mol. Opt. Phys.

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This work presents calculations of the parity non-conserving (PNC) electric dipole transitions 6s + 7s in Cs and of the 6p,,, + 7p,,, and 6p,,, + 6p,,, transitions in T1, made possible by the weak interaction between electrons and nucleons. In addition to effects that can be accounted for in an independent-particle description, we have calculated those second-order correlation effects that can be described as modifications of the valence orbitals to approximate Brueckner orbitals, including terms where the PNC correction occurs on intermediate orbitals, as well as on external orbitals. Similar calculations were performed for the electric dipole moment ( EDM) of the ground states of Cs and TI, expressed in terms of a possible electron EDM, which, if found, implies simultaneous violation of symmetry under parity and time reversal.

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Section: Dzuba Er Al (1989a)mentioning

confidence: 68%

Parity non-conservation and electric dipole moments in caesium and thallium

Hartley

Lindroth

Pendrill

1990

J. Phys. B: At. Mol. Opt. Phys.

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“…We can write E pv 1 as the product of (Q W / − N) by a purely atomic quantity, (a,b) Paris 82-83 −0.908 ± 0.010 (f) Novosibirsk 89 −0.867 ± 0.069 (c) Boulder 85 −0.905 ± 0.009 (g) Notre Dame 90 −0.828 ± 0.020 (d) Boulder 88 −0.837 ± 0.003 exp ± 0.006 (e) theory Boulder 97 Semi-empirical * βa 3 0 from S.E. evaluations −0.935 ± 0.02 ± 0.03 (j) Paris 86 27.19 ± 0.4 (h) −0.904 ± 0.02 (k) Oxford 90 27.17 ± 0.35 (i) −0.895 ± 0.02 (l) Paris 91 βa 3 0 from first principles 27.00 ± 0.20 (m) A/B ⇒ Q exp W = −72.1 ± 0.3 exp ± 0.9 theory (a) Bouchiat et al (1982); (b) Bouchiat et al (1984); (c) Gilbert et al (1985); (d) Noecker et al (1988); (e) Wood et al (1997); (f) Dzuba et al (1989b); (g) Blundell et al (1990); (h) Bouchiat and Piketty (1983); (i) Bouchiat and Guéna (1988); (j) Bouchiat and Piketty (1986); (k) Hartley and Sandars (1990); (l) Bouchiat (1991); (m) Blundell et al (1992).…”

Section: Atomic Physics Calculations and The Present Status Of The Re...mentioning

confidence: 95%

“…Atomic physics calculations are necessary to extract the weak charge from the experimental data. We can write E pv 1 as the product of (Q W / − N) by a purely atomic quantity, (1983); (i) Bouchiat and Guéna (1988); (j) Bouchiat and Piketty (1986); (k) Hartley and Sandars (1990); (l) Bouchiat (1991); (m) Blundell et al (1992).…”

Section: Atomic Physics Calculations and The Present Status Of The Rementioning

confidence: 99%

Parity violation in atoms

1997

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Optical experiments have demonstrated cases in which mirror symmetry in stable atoms is broken during the absorption or emission of light. Such results, which are in conflict with quantum electrodynamics, support the theory of unification of the electromagnetic and weak interactions. The interpretation of the experimental results is based on exchanges of weak neutral Z 0 bosons between the electrons and the nucleus of the atom. A concise review of these phenomena in atomic physics is presented. The role of precise caesium parity-violation experiments, as a source of valuable information about electroweak physics, is illustrated by examples pertaining to experimental conditions which, in some cases, are not accessible to accelerator experiments. We give the basic principles of experiments, some under way and others completed, where a quantitative determination of the nuclear weak charge, Q W , which plays for the Z 0 exchange the same role as the electric charge for the Coulomb interaction is to be, or has been achieved. In the most recent and most precise experiment the accuracy on Q W is limited to 1% by the uncertainty due to atomic physics calculations. Such a result challenges specialists in atomic theory and nuclear structure, since a more accurate determination of Q W would mean more stringent constraints upon possible extensions of the standard model. Moreover, clear evidence has recently been obtained for the existence of the nuclear anapole moment, which describes the valence electron interaction with a chiral nuclear-magnetization component induced by the parity-violating nuclear forces. In writing this review, our hope was to make clear that any improvement in atomic parity-violation measurements will allow the exploration of new areas of electroweak physics.

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Violations of fundamental symmetries in atoms and tests of unification theories of elementary particles

2004

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High-precision measurements of violations of fundamental symmetries in atoms are a very effective means of testing the standard model of elementary particles and searching for new physics beyond it. Such studies complement measurements at high energies. We review the recent progress in atomic parity nonconservation and atomic electric dipole moments (time reversal symmetry violation), with a particular focus on the atomic theory required to interpret the measurements.

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A semi-empirical ratio method for the calculation of parity non-conservation in caesium

Cited by 6 publications

References 9 publications

Parity non-conservation and electric dipole moments in caesium and thallium

Parity non-conservation and electric dipole moments in caesium and thallium

Parity violation in atoms

Violations of fundamental symmetries in atoms and tests of unification theories of elementary particles

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