Effect of scalar field mass on gravitating charged scalar solitons and   black holes in a cavity
  We study soliton and black hole solutions of Einstein charged scalar field theory in cavity. We examine the effect of introducing a scalar field mass on static, spherically symmetric solutions of the field equations. We focus particularly on the spaces of soliton and black hole solutions, as well as studying their stability under linear, spherically symmetric perturbations of the metric, electromagnetic field, and scalar field. 
Supakchai Ponglertsakul and Elizabeth Winstanley
gr-qc hep-th