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.
Keywords
high energy physics phenomenology, dipole moments, diquark models
Subject Categories
Polarizability (Electricity), Quark models, Neutrons
Disciplines
Physics
Publication Date
2010
Permanent URL
Recommended Citation
Srivastava, Y. N.; Widom, A.; Swain, J.; and Panella, O., "Electric dipole moments and polarizability in the quark-diquark model of the neutron" (2010). Physics Faculty Publications. Paper 163. http://hdl.handle.net/2047/d20000774
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Notes
Originally posted at http://arxiv.org/abs/1006.0579v1.