Improved limits on the hadronic and semihadronic CP violating parameters and role of a dark force carrier in the electric dipole moment of $^{199}$Hg
Abstract
Combining the recently reported electric dipole moment (EDM) of $^{199}$Hg atom due to breaking of parity and timereversal symmetries with the improved relativistic atomic calculations, precise limits on the tensorpseudotensor (TPT) electronnucleus (eN) coupling coefficient and the nuclear Schiff moment (NSM) interactions are determined. Using these limits with the nuclear calculations, we infer limits on the EDMs of neutron and proton as $d_n < 2.2 \times 10^{26} e \rm{cm}$ and $d_p < 2.1 \times 10^{25} e \rm{cm}$, respectively, and on the quantum chromodynamics (QCD) parameter and the combined up and down quark chromoEDMs as $\bar{\theta} < 1.1 \times 10^{10}$ and $\tilde{d}_u  \tilde{d}_d < 5.5 \times 10^{27} e\rm{cm}$, respectively. These are the best limits till date to probe new sources of CP violation beyond the standard model (SM) from a diamagnetic atom. Role of considering a capable manybody method to account the electron correlation effects to all orders for inferring the above limits has been highlighted. From this analysis, constraints on the TPT eN coupling coefficient with a large range of mass of a possible dark matter carrier $\chi$ between the atomic electrons and nucleus are given.
 Publication:

arXiv eprints
 Pub Date:
 December 2016
 arXiv:
 arXiv:1612.09371
 Bibcode:
 2016arXiv161209371S
 Keywords:

 High Energy Physics  Phenomenology;
 Nuclear Theory;
 Physics  Atomic Physics
 EPrint:
 2 tables and 4 figures