Electric Dipole Moments and Polarizability in the Quark-Diquark Model of the Neutron

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 ${\Lambda }_{H_{2}O}\approx 0.385\dot{A}$. The neutron may also be said to have an electric dipole moment strength with ${\Lambda }_{neutron}\approx 0.612fm$. The neutron analysis can be made experimentally consistent, if one employs a quark-diquark model of neutron structure.

arXiv commentfour pages, two figures

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Cited by in corpus (1)

• Diquarks in the nilpotency expansion of QCD and their role at finite chemical potential