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In the context of an atom endowed with nuclear electric dipole moment (EDM),we consider the effects on the Schiff moment of $CPT$-even Lorentz-violating(LV) terms that modify the Coulomb potential. First, we study the modificationson the Schiff moment when the nucleus interacts with the electronic cloud bymeans of a Coulomb potential altered only by the $P$-even LV components. Next,by supposing the existence of an additional intrinsic LV EDM generated by otherLV sources, we assess the corrections to the Schiff moment when the interactionnucleus-electrons runs mediated by a Coulomb potential modified by both the$P$-odd and $P$-even LV components. We then use known estimates and EDMmeasurements to discuss upper bounds on the new Schiff moment components andthe possibility of an intrisic nuclear EDM component ascribed to LV effects.

Lorentz-violating contributions to the nuclear Schiff moment and nuclear EDM