Newtonian Counterparts of Spin 2 Massless Discontinuities

الأصل · EN

Massive spin 2 theories in flat or cosmological (Λ≠ 0) backgrounds are subject to discontinuities as the masses tend to zero. We show and explain physically why their Newtonian limits do not inherit this behaviour. On the other hand, conventional ``Newtonian cosmology'', where Λ is a constant source of the potential, displays discontinuities: e.g. for any finite range, Λ can be totally removed.