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The momentum conservation sum rule for deep inelastic scattering (DIS) fromcomposite particles is investigated using the general theory of relativity. Fortwo 1+1 dimensional examples, it shown that covariant theories automaticallysatisy the DIS momentum conservation sum rule provided the bound state iscovariantilly normalized. Therefore, in these cases the two DIS sum rules forbaryon conservation and momentum conservation are equivalent

Gravitational coupling to two-particle bound states and momentum conservation in deep inelastic scattering