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Deuteron EDM induced by CP violating couplings of pseudoscalar mesons

Authors :
Zhevlakov, Alexey S.
Lyubovitskij, Valery E.
Source :
Phys. Rev. D 101, 115041 (2020)
Publication Year :
2020

Abstract

We analyze contributions to the electric dipole (EDM) and Schiff (SFM) moments of deuteron induced by the CP-violating three-pseudoscalar meson couplings using phenomenological Lagrangian approach involving nucleons and pseudoscalar mesons $P=\pi, K, \eta, \eta'$. 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 quasi free 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 $\bar\theta$ parameter. We showed that proposed measurements of proton and deuteron EDMs at level of $\sim 10^{-29}$ by the Store Ring EDM and JEDI Collaborations will provide more stringent upper limits on the CP violating parameters.

Details

Database :
arXiv
Journal :
Phys. Rev. D 101, 115041 (2020)
Publication Type :
Report
Accession number :
edsarx.2003.12217
Document Type :
Working Paper
Full Text :
https://doi.org/10.1103/PhysRevD.101.115041