Hadronic electric dipole moments in R-parity violating supersymmetry

Amand Faessler, Thomas Gutsche, Sergey Kovalenko, Valery E. Lyubovitskij

Resultado de la investigación: Contribución a una revistaArtículo

13 Citas (Scopus)

Resumen

We calculate the electric dipole moments (EDM) of the neutral Hg199 atom, neutron and deuteron within a generic R-parity violating SUSY model (R p SUSY) on the basis of a one-pion-exchange model with CP-odd pion-nucleon interactions. We consider two types of the R p SUSY contributions to the above hadronic EDMs: via the quark chromoelectric dipole moments (CEDM) and CP-violating 4-quark interactions. We demonstrate that the former contributes to all the three studied EDMs while the latter appears only in the nuclear EDMs via the CP-odd nuclear forces. We find that the R p SUSY induced 4-quark interactions arise at tree level through the sneutrino exchange and involve only s and b quarks. Therefore, their effect in hadronic EDMs is determined by the strange and bottom-quark sea of the nucleon. From the null experimental results on the hadronic EDMs we derive the limits on the imaginary parts of certain products Im(λ′λ′*) of the trilinear R p-couplings and show that the currently best limits come from the Hg199 EDM experiments. We demonstrate that some of these limits are better than those existing in the literature. We argue that future storage ring experiments on the deuteron EDM are able to improve these limits by several orders of magnitude. © 2006 The American Physical Society.

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