Angom Dilip Singh | Searcharxiv

arXiv2002

The Parity Non-Conserving 3P0--1P1 E1 Transition Amplitude of the Atomic Yb

The atomic parity non-conservation(PNC) experiments has reached accuracies which have important implications for physics beyond the standard model. An optical rotation experiment to measure the atomic PNC of the 3P1(6s6p)--1P1(6s6p) in Yb was proposed recently. Our screened electron-electron coulomb potential multi-configuration Dirac-Fock calculation of th PNC induced E1 transition amplitude of this transition E1_PNC = -96.0 x 10^{-11}iea_0(-Q_W/N) of 171Yb is more than two orders of magnitude larger than E1_PNC(6s-7s) = -0.8991 x 10^{-11}iea_0(-Q_W/N) of 133Cs.

physics.atom-ph↗

arXiv2001

Coupled Electron Pair Approximation Calculation of the Electric Dipole Moment of Atomic Yb

The existence of a finite electric dipole moment (EDM) d_a of the closed-shell atom Yb implies parity and time reversal violations involving the nuclear sector. An important effect which can contribute to the Yb EDM is the tensor-pseudotensor electron-nucleus interaction characterized by the coupling constant C_T. Within the Standard Model (SM) of particle physics C_T=0, as this form of interaction is not allowed. If a finite d_a of Yb is observed in experiments, then an estimate of C_T can be obtained by combining with the theoretical calculations. A non-zero C_T implies physics beyond the standard model. In this paper we present the result of our ab initio calculation of the EDM Yb using different many-body methods.

physics.atom-ph↗