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arXiv 0804.3815nucl-thnucl-ex
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~ 3 He的核电偶极矩

Nuclear Electric Dipole Moment of 3He

I. Stetcu, C. -P. Liu, J. L. Friar, A. C. Hayes, P. Navratil

摘要:

物理系统的永久电偶极矩(EDM)需要时间反演(T)和宇称(P)破坏。目前,实验计划正在推动原子、原子核和中子中的EDM限制达到基本理论兴趣的范围。在这里,我们计算的PT违反EDM的3 He和预期的敏感性,这样的测量的基本PT违反相互作用的幅度。假设耦合常数是相当的大小为π,ρ,ω交换,我们发现,π交换的贡献占主导地位。我们的研究结果表明,测量的3 He EDM是补充计划中的中子和氘核实验,并可以提供一个强大的约束的理论模型的π-核子PT破坏相互作用。

英文摘要:

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 PT-violating EDM of 3He and the expected sensitivity of such a measurement to the underlying PT-violating interactions. Assuming that the coupling constants are of comparable magnitude for pi-, rho-, and omega-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 PT-violating interaction.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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