2014/01/06 by Takashi Tamaki, Nobuyuki Sakai, Tamaki, Takashi +1
Physics and Astronomy · #Black Holes and Theoretical Physics #Cosmology and Gravitation Theories #FOS: Physical sciences #General Relativity and Quantum Cosmology (gr-qc) #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th) #Pulsars and Gravitational Waves Research
paper · pdf · doi:10.48550/arxiv.1401.0996
openalex publication_date 2014/01/06 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
We consider gauged Q-balls in the gravity-mediation-type model in the Affleck-Dine mechanism, which is described by the potential V\rm grav.(ϕ):=(m\rm grav.2/2)ϕ2[1+Kln(ϕ/M)2] with K<0. In many models of gauged Q-balls, which were studied in the literature, there are upper limits for charge and size of Q-balls due to repulsive Coulomb force. In the present model, by contrast, our numerical calculation strongly suggests that stable solutions with any amount of charge and size exist. As the electric charge Q increases, the field configuration of the scalar field becomes shell-like; because the charge is concentrated on the surface, the Coulomb force does not destroy the Q-ball configuration. These properties are analogous to those in the V-shaped model, which was studied by Arodź and Lis. We also find that for each K there is another sequence of unstable solutions, which is separated from the other sequence of the stable solutions. As |K| increases, the two sequences approach; eventually at some point in -1.07