Dynamic generation or removal of a scalar hair

A bstract We study dynamic processes through which the scalar hair of black holes is generated or detached in a theory with field non-minimally coupled to Gauss-Bonnet and Ricci invariants. concentrate on nonlinear temporal evolution far-from-equilibrium gravitational system. In our simulations, we choose initial spacetime be either bald Schwarzschild scalarized spherically symmetric hole. Succeeding continuous accretion onto original hole, final fate system displays intriguing features, depend configurations, strengths perturbation, specific metric parameters. addition scalarization process hole addresses hair, observe dynamical descalarization, removes from an hairy after accretion. examine field, metrics, Misner-Sharp mass exhibit rich phase structures processes.