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Accurate determination of the enhancement factor X for the nuclear Schiff moment in 205TlF molecule based on the four-component relativistic coupled-cluster theory

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posted on 2020-05-23, 17:52 authored by Minori Abe, Takashi Tsutsui, Jörgen Ekman, Masahiko Hada, Bhanu Das

Studies of parity (P) and time-reversal (T) symmetry violations using molecules are important and attractive because they are complementary to the high-energy tests of physics beyond the Standard Model of elementary particles. The focus of our present work is to surpass the current accuracies of the quantity X, an enhancement factor for the nuclear Schiff moment (Q), and the nucleon electric dipole moments for the 205TlF molecule. We obtain X = 6856 a.u. using a relativistic coupled-cluster singles and doubles and perturbative triples (CCSD(T)) approach. This new value of X improves the upper limits for Q and the proton EDM by about ten percent over the previous ones.

Funding

This work was supported by JSPS [Japan Society for the Promotion of Science] KAKENHI Grant Number 17H03011, and 17H02881.

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