Revisiting Theoretical Analysis of Electric Dipole Moment of 129^{129}Xe

Linear response approach to the relativistic coupled-cluster (RCC) theory has been extended to estimate contributions from the parity and time-reversal violating pseudoscalar-scalar (Ps-S) and scalar-pseudoscalar (S-Ps) electron-nucleus interactions along with electric dipole moments (EDMs) of electrons ($d_e$) interacting with internal electric and magnetic fields. Random phase approximation (RPA) is also employed to produce results to compare with the earlier reported values and demonstrate importance of the non-RPA contributions arising through the RCC method. It shows that contributions from the S-Ps interactions and $d_e$ arising through the hyperfine-induced effects are very sensitive to the contributions from the high-lying virtual orbitals. Combining atomic results with the nuclear shell-model calculations, we impose constraints on the pion-nucleon coupling coefficients, and EDMs of proton and neutron. These results are further used to constrain EDMs and chromo-EDMs of up- and down-quarks by analyzing particle physics models.Comment: 15 pages including appendix, 8 tables and 1 figur

Electric dipole moment of 199^{199}Hg atom from PP, CPCP-odd electron-nucleon interaction

International audienceWe calculate the effect of the P, CP-odd electron-nucleon interaction on the electric dipole moment of the Hg199 atom by evaluating the nuclear spin matrix elements in terms of the nuclear shell model. It is found that the neutron spin matrix element of the Hg199 nucleus is ⟨Ψ|σnz|Ψ⟩≈-0.4 with a dominant configuration of p1/2 orbital neutron. We also derive constraints on the CP phases of Higgs-doublet models, supersymmetric models, and leptoquark models from the latest experimental limit |dHg|<7.4×10-30  e cm

Ultrahigh-Pressure Preparation and Catalytic Activity of MOF-Derived Cu Nanoparticles

A metal-organic framework (MOF) consisting of Cu-benzenetricarboxylic acid was processed under ultrahigh pressure (5 GPa) and at temperature of up to 500 degrees C. The products were characterized with TEM, FTIR, and XAFS. The decomposition of the MOF started at 200 degrees C at 5 GPa. This temperature was much lower than that in the vacuum. Single-nanometer Cu nanoparticles were obtained in carbon matrix, which was significantly smaller than the Cu particles prepared at ambient pressure. The catalytic activity for Huisgen cycloaddition was examined, and the sample processed at 5 GPa showed a much improved performance compared with that of the MOF-derived Cu nanoparticles prepared without high pressure