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    • Boson stars and black holes with complex and real scalar hairPeer reviewedOpen access 

      08 avril 2025, Brihaye, Yves; Buisseret, Fabien; Hartmann, Betti; Layfield, Oliver, CeREF Technique
      Article scientifique
      We discuss boson stars and black holes with scalar hair in a model where the complex scalar field forming the boson star and the hair on the black hole, respectively, interacts with a real scalar field via a H´enon-Heiles-type potential. We demonstrate that black holes and boson stars carrying only a real scalar field with cubic self-interaction are possible and that black holes with both real ...

    • Q-balls and charged Q-balls in a two-scalar field theory with generalized Henon-Heiles potentialPeer reviewedOpen access 

      30 avril 2024, Buisseret, Fabien; Brihaye, Yves, CeREF Technique
      Article scientifique
      We construct Q-ball solutions from a model consisting of one massive scalar field ξ and one massive complex scalar field ϕ interacting via the cubic couplings g1ξϕ ϕ þ g2ξ3, typical of Henon-Heiles-like potentials. Although being formally simple, these couplings allow for Q-balls. In one spatial dimension, analytical solutions exist, either with vanishing or nonvanishing ϕ. In three spatial ...