## Physics Faculty Publications

#### Abstract

For a bound state internal wave function respecting parity symmetry, it can be rigorously argued that the mean electric dipole moment must be strictly zero. Thus, both the neutron, viewed as a bound state of three quarks, and the water molecule, viewed as a bound state of ten electrons two protons and an oxygen nucleus, both have zero mean electric dipole moments. Yet, the water molecule is said to have a nonzero dipole moment strength $d=e\Lambda$ with $\Lambda_{H_2O} \approx 0.385\ \dot{A}$. The neutron may also be said to have an electric dipole moment strength with $\Lambda_{neutron} \approx 0.612\ fm$. The neutron analysis can be made experimentally consistent, if one employs a quark-diquark model of neutron structure.

#### Notes

Originally posted at http://arxiv.org/abs/1006.0579v1.

#### Keywords

high energy physics phenomenology, dipole moments, diquark models

#### Subject Categories

Polarizability (Electricity), Quark models, Neutrons

Physics

2010

#### Permanent URL

http://hdl.handle.net/2047/d20000774

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