Elsevier

Physics Letters B

Volume 665, Issue 4, 24 July 2008, Pages 168-172
Physics Letters B

Nuclear electric dipole moment of 3He

https://doi.org/10.1016/j.physletb.2008.06.019Get rights and content
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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.

PACS

11.30.Er
21.10.Ky
21.60.De
21.60.Cs

Keywords

Time-reversal and parity violation
Nucleon–nucleon interactions
Electric dipole moments

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