P , T -odd effects in YbCu, YbAg, and YbAu

In this work, the molecular enhancement factors of the P,T-odd interactions involving the electron electric dipole moment (Wd) and the scalar-pseudoscalar nucleon-electron couplings (Ws) are computed for the ground state of the bimetallic molecules YbCu, YbAg, and YbAu. These systems offer a promising avenue for creating cold molecules by associating laser-cooled atoms. The relativistic coupled-cluster approach is used in the calculations, and a thorough uncertainty analysis is performed to give accurate and reliable uncertainties to the obtained values. Furthermore, an in-depth investigation of the different electronic structure effects that determine the magnitude of the calculated enhancement factors is carried out, and two different schemes for computing Wd are compared. The final values for the enhancement factors are (13.32±0.13)×1024hHzecm, (12.19±0.12)×1024hHzecm, and (2.36±0.48)×1024hHzecm for Wd and (-48.63 ± 0.53) h kHz, (-45.68 ± 0.60) h kHz, and (3.81 ± 2.58) h kHz for Ws, for YbCu, YbAg, and YbAu, respectively.