Exotic-atom measurement of the magnetic dipole moment of the<mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" display="inline"><mml:mrow><mml:msup><mml:mrow><mml:mi>Σ</mml:mi></mml:mrow><mml:mrow><mml:mi mathvariant="normal">−</mml:mi></mml:mrow></mml:msup></mml:mrow></mml:math>hyperon

Dw, Hertzog; Eckhause, M.; Pp, Guss; Joyce, D.; kane,; Wc, Phillips; Wf, Vulcan; Welsh, R. E.; Rj, Whyley; Rg, Winter; Austin, E.J.; Jp, Miller; O'Brien, F.; Bl, Roberts; Gw, Dodson; Rj, Powers; Rb, Sutton; Ar, Kunselman

doi:10.1103/physrevd.37.1142

Cited by 12 publications

(22 citation statements)

References 35 publications

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“…(3.13) to order 1/A. This accuracy is sufficient for extracting the Σ − magnetic moment from the spin-orbit splitting of the high-Z exotic atoms Pb-Σ − and W-Σ − [2]. In low-Z atoms such asp-3 He or K − -p the 1/A 2 corrections are important.…”

Section: Isotope Effect In Spin-orbit Interactionsmentioning

confidence: 96%

“…EC corrections to the charge density operator and therefore to the quadrupole moments and the neutron charge radius are of the order (v/c) 3 . In the framework 2 A subclass of Z-diagrams shown on Fig. 2(d) of Ref.…”

Section: Configuration Mixing Vs Two-body Exchange Currentsmentioning

confidence: 99%

“…The multipole moments of Ω − : μ = −2.02 n.m. [3,4], Q = −2.8 × 10 −2 fm 2 [23]. U [2] max is the maximum value over F of the root mean square of eigenvalues of the matrix elements F J |U [2] |F J , U [4] max is defined similarly. For 1 H, the strong decay width is given by Eq.…”

Section: Quadrupole-spin Contact P -Wave Interactionsmentioning

confidence: 99%

“…In Ref. [2], the Σ − magnetic moment has been measured from fine structure in Σ − exotic atoms. In exotic atoms, the isotope effect becomes important.…”

Section: Isotope Effect In Spin-orbit Interactionsmentioning

confidence: 99%

“…Such method has been successful in extracting experimentally the magnetic moment of the Σ − -hyperon from fine splitting in Σ − exotic atoms [2]. The Ω − magnetic moment has been measured with high precision, however, by other techniques [3,4].…”

Section: Introductionmentioning

confidence: 98%

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Decays, contact P-wave interactions and hyperfine structure in exotic atoms

Krivoruchenko

Faessler

2008

Nuclear Physics A

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Contact P -wave interactions connected to the Larmor interaction of a magnetic dipole and Thomas spin precession in the filed of an electric quadrupole are described and their implications for spectroscopy of exotic Ω − -atoms are studied. In order to evaluate the magnitude of the contact P -wave interactions as compared to the conventional long-range interactions and the sensitivity of spectroscopic data to the Ω − -hyperon quadrupole moment, we consider 2P states of Ω − atoms formed with light stable nuclei with spins I 1/2 and atomic numbers Z 10. The energy level splitting caused by the contact interactions is 2-5 orders of magnitude smaller than the conventional long-range interactions. Strong decay widths of pΩ − atoms due to reactions pΩ − → ΛΞ 0 and pΩ − → ΣΞ , induced by t-channel kaon exchanges, are calculated. Ω − atoms formed with the light nuclei have strong widths 5-6 orders of magnitude higher than splitting caused by the contact interactions. The low-L pattern in the energy spectra of intermediate-and high-Z Ω − atoms thus cannot be observed. The Ω − quadrupole moment can be measured by observing X-rays from circular transitions between high-L levels in Ω − exotic atoms. The effect of strong interactions in 208 PbΩ − atoms is negligible starting from L ∼ 10. The contact P -wave interactions exist in ordinary atoms and μ-meson atoms.

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Section: Isotope Effect In Spin-orbit Interactionsmentioning

confidence: 96%

Section: Configuration Mixing Vs Two-body Exchange Currentsmentioning

confidence: 99%

Section: Quadrupole-spin Contact P -Wave Interactionsmentioning

confidence: 99%

“…In Ref. [2], the Σ − magnetic moment has been measured from fine structure in Σ − exotic atoms. In exotic atoms, the isotope effect becomes important.…”

Section: Isotope Effect In Spin-orbit Interactionsmentioning

confidence: 99%