Role of negative-energy states and Breit interaction in calculation of atomic parity-nonconserving amplitudes

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dc.creatorDerevianko, A.
dc.date2000-01-21
dc.date.accessioned2026-07-07T05:43:43Z
dc.date.available2026-07-07T05:43:43Z
dc.descriptionIt is demonstrated that Breit and negative-energy state contributions reduce the 2.5 sigma deviation [S.C. Bennett and C.E. Wieman, Phys. Rev. Lett. 82, 2484 (1999)] in the value of the weak charge of 133Cs from the Standard Model prediction to 1.7sigma. The corrections are obtained in the relativistic many-body perturbation theory by combining all-order Coulomb and second-order Breit contributions. The corrections to parity-nonconserving amplitudes amount to 0.6% in 133Cs and 1.1% in 223Fr. The relevant magnetic-dipole hyperfine structure constants are modified at the level of 0.3% in Cs, and 0.6% in Fr. Electric-dipole matrix elements are affected at 0.1% level in Cs and a few 0.1% in Fr.
dc.descriptionsubmitted to PRL
dc.identifierhttps://arxiv.org/abs/physics/0001046
dc.identifierhttp://arxiv.org/abs/physics/0001046
dc.identifier.urihttp://salesiana.dossiersoluciones.com/handle/123456789/83362
dc.subjectAtomic Physics
dc.subjectHigh Energy Physics - Phenomenology
dc.titleRole of negative-energy states and Breit interaction in calculation of atomic parity-nonconserving amplitudes
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