Renormalized Pair Interactions and Three-Body Polarization Forces in Solid Hydrogen

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Abstract
We find that the inclusion of the pseudo-three-body forces between all neighbors does not remove the difficulty of obtaining a consistent analysis of the microwave spectrum of solid hydrogen observed by Hardy and Berlinsky. We propose a novel anisotropic interaction, due to the deviation from axial symmetry of the pair distribution function of neighboring molecules, leading to a satisfactory interpretation, and yielding new information about lattice dynamics.
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