Semi-hadronic charge-parity violation interaction constants in CsAg, FrLi and FrAg molecules
Year: 2025
Type: article
Abstract: We present a systematic study of the nucleon-electron tensor-pseudotensor (Ne-TPT) interaction in the francium-silver (FrAg), cesium-silver (CsAg), and francium-lithium (FrLi) molecules which are candidates for next-generation experimental searches for new sources of charge-parity violation. The considered molecules are all amenable to assembly from laser-cooled atoms, with the FrAg molecule previously shown to be the most sensitive to the Schiff moment interaction in this set. Interelectron correlation effects are treated through relativistic general-excitation-rank configuration interaction theory in the framework of the Dirac–Coulomb Hamiltonian. We find in FrAg the Ne-TPT interaction constant to be $$W_T({\text {Fr}}) = 2.57 \pm 0.21 [\left<\Sigma \right>_A \textrm{kHz}]$$ W T ( Fr ) = 2.57 ± 0.21 [ Σ A kHz ] , considering the Francium atom as target of the measurement. Taking into account nuclear structure in a multi-source interpretation of a measured electric dipole moment, FrAg is found to be an excellent probe of physics beyond the standard model as this system will in addition to its sizeable Ne-TPT interaction constant greatly constrain fundamental parameters such as the semileptonic four-fermion interaction $$C_{\text {lequ}}$$ C lequ from which nuclear and atomic $$\mathcal{{CP}}$$ CP -violating properties arise. GraphicAbstract Nucleon–electron tensorpseudotensor interaction on the Francium target nucleus in the Francium-Silver molecule, where the corresponding Hamiltonian operator is parity- and time-reversal violating. Details of the interaction are explained in the paper body. These interactions give rise to molecular charge-parity violating effects that can be detected by experiments.
Source: The European Physical Journal D
Authors: Aurélien Marc, Timo Fleig
Language: English
Topic: Atomic and Molecular Physics
Subfield: Atomic and Molecular Physics, and Optics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: hybrid
Estimated APC paid: $3,790
Funder: Université de Toulouse
OpenAlex ID: W4408212857