# Revisiting the Eichten - Feinberg - Gromes Q \\bar{Q} Spin-Orbit Interaction

Source: [Revisiting the Eichten - Feinberg - Gromes Q \\bar{Q} Spin-Orbit Interaction](<https://www.sota2.com/research/paper/68fa21577a2b558e293369c2>)

Collection index: [llms.txt](<https://www.sota2.com/research/llms.txt>)

Data updated: 2025-10-24T00:56:50.514Z

Authors: K.Williams

Published: 1996-07-01T20:05:31.000Z

## Abstract

Invariant and covariant forms of the quark-antiquark interaction derived by the method of Eichten and Feinberg are considered. Relations between the various terms imposed by Lorentz transformation constraints, here called Gromes relations, are found to exist in neither case. Details of the Gromes relation proper are reconsidered and inconsistencies found that lead to a violation of covariance.

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## Original sources and implementation

[Original paper](<https://arxiv.org/abs/hep-ph/9607211>)

[PDF](<https://arxiv.org/pdf/hep-ph/9607211.pdf>)