Seminarium "Teoria cząstek elementarnych i kosmologia"

In the SM, CP violation (CPV) is insufficient for baryogenesis and near-term future measurements of electric dipole moments (EDMs). We examine whether chromo-electric dipole moments (CEDMs) of gluons and light quarks can be distinguished from the QCD θ-term using EDMs of nucleons and diamagnetic nuclei. We analyze scenarios with and without the Peccei-Quinn (PQ) mechanism explaining the strong CP problem. Without PQ, nucleon EDMs show distinctive patterns when induced by light quark CEDMs. With PQ, nucleon EDMs are similar regardless of the source, but some diamagnetic nuclei EDMs may reveal characteristic patterns depending on the dominant source. On the other hand, distinguishing gluon CEDM from θ-term requires additional knowledge of low energy hadronic parameters, which limit the analysis at present. Our results suggest that EDMs may reveal unambiguous sign of BSM CPV possibly also identifying the origin of the axion vacuum expectation value.