Abstract
A nuclear structure campaign has been initiated to investigate the isotopes of mercury near A = 199. Currently 199 Hg provides the most stringent limit on an atomic electric dipole moment (EDM). The observation of a permanent EDM would represent a clear signal of CP violation from new physics beyond the Standard Model. Theoretical calculations for 199 Hg are very di cult and give varied predictions for the excited-state spectrum. Understanding the E2 and E3 strengths in the neighbouring even-even iso- topes of mercury will make it possible to develop a nuclear structure model for the Schi strength based on these matrix elements, and thereby constrain present model predictions of the contribution of octupole collectivity to the Schi moment of the nucleus.
Highlights
A particle electric dipole moment (EDM) is odd under both the P and T transformations, a permanent EDM for an elementary particle or atom can only arise from parity and time-reversal violating fundamental interactions
EPJ Web of Conferences sources of conjugation and parity symmetry (CP) violation are required and provide a strong motivation to search for new CP violating physics beyond the Standard Model
The intrinsic Schiff moment, the lowest order time-reversal odd moment of a nucleus that is measurable in a neutral atom [5], is a measure of the difference between the charge and dipole distributions of the nucleus
Summary
A particle EDM is odd under both the P and T transformations, a permanent EDM for an elementary particle or atom can only arise from parity and time-reversal violating fundamental interactions. EPJ Web of Conferences sources of CP violation are required and provide a strong motivation to search for new CP violating physics beyond the Standard Model.
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