Deuteron EDM induced by -violating couplings of pseudoscalar mesons
| Autor: | Valery E. Lyubovitskij, Alexey S. Zhevlakov |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2020 |
| Předmět: |
Physics
Particle physics Proton Meson 010308 nuclear & particles physics Hadron High Energy Physics::Phenomenology Nuclear Theory FOS: Physical sciences 01 natural sciences Computer Science::Digital Libraries Pseudoscalar Electric dipole moment High Energy Physics - Phenomenology High Energy Physics - Phenomenology (hep-ph) 0103 physical sciences Bound state Neutron High Energy Physics::Experiment Physics::Atomic Physics 010306 general physics Nucleon Nuclear Experiment |
| Zdroj: | Physical Review |
| Popis: | We analyze contributions to the electric dipole moment (EDM) and Schiff moment of deuteron induced by the CP-violating three-pseudoscalar meson couplings using phenomenological Lagrangian approach involving nucleons and pseudoscalar mesons P=π,K,η,η′. Deuteron is considered as a proton-neutron bound state and its properties are defined by one- and two-body forces. One-body forces correspond to a picture there; proton and neutron are quasifree constituents of deuteron and their contribution to the deuteron EDM (dEDM) is simply the sum of proton and neutron EDMs. Two-body forces in deuteron are induced by one-meson exchange between nucleons. They produce a contribution to the dEDM, which is estimated using corresponding potential approach. From numerical analysis of nucleon and deuteron EDMs, we derive stringent limits on CP-violating hadronic couplings and θ¯ parameter. We showed that proposed measurements of proton and deuteron EDMs at level of ∼10−29 by the Store Ring EDM and JEDI Collaborations will provide more stringent upper limits on the CP-violating parameters. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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