Department of Physics2024-11-0920202470-001010.1103/PhysRevD.102.1240652-s2.0-85099146957https://hdl.handle.net/20.500.14288/791Recently, a toy model was introduced to demonstrate that screening mechanisms in alternative theories of gravitation can hide additional effects. In this model a scalar field is charged under a U(1) symmetry. In sufficiently compact objects the scalar field spontaneously grows, i.e., the object scalarizes, spontaneously breaking the U(1) symmetry. Exactly as in the U(1) Higgs mechanism this leads to the emergence of a mass for the gauge field. The aim of this paper is to provide an example of the physical consequences if we consider this toy model as a prototype of Weak Equivalence Principle (WEP) violations. We model neutron stars with a dipolar magnetic field to compare the magnetic field behavior of stars in Einstein-Maxwell theory on the one hand and in scalar-tensor theory with the, so-called, gravitational Higgs mechanism on the other hand.pdfPhysicsGravitationCosmologyAstrophysicsJournal Article2470-0029https://doi.org/10.1103/PhysRevD.102.124065603255600004N/ANOIR02690