Nuclear electric dipole moment of He |
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| Authors: | I Stetcu C-P Liu JL Friar AC Hayes P Navrátil |
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| Institution: | 1. Theoretical Division, Los Alamos National Laboratory, Los Alamos, NM 87545, USA;2. Department of Physics, University of Wisconsin-Madison, Madison, WI 53706, USA;3. Physics Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831, USA;4. Lawrence Livermore National Laboratory, PO Box 808, L-414, CA 94551, USA |
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| Abstract: | A permanent electric dipole moment (EDM) of a physical system requires time-reversal (T) and parity (P) violation. Experimental programs are currently pushing the limits on EDMs in atoms, nuclei, and the neutron to regimes of fundamental theoretical interest. Here we calculate the magnitude of the P-, T-violating EDM of 3He and the expected sensitivity of such a measurement to the underlying P-, T-violating interactions. Assuming that the coupling constants are of comparable magnitude for π-, ρ-, and ω-exchanges, we find that the pion-exchange contribution dominates. Our results suggest that a measurement of the 3He EDM is complementary to the planned neutron and deuteron experiments, and could provide a powerful constraint for the theoretical models of the pion–nucleon P-, T-violating interaction. |
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| Keywords: | 11 30 Er 21 10 Ky 21 60 De 21 60 Cs |
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