Dilatonic dyon-like black hole solutions in the model with two Abelian gauge fields

• Published in: The European physical journal. C, Particles and fields Particles and fields, 2017-03, Vol.77 (3), p.1-10, Article 180
• Main Authors: Abishev, M. E., Boshkayev, K. A., Ivashchuk, V. D.
• Format: Article
• Language: English
• Subjects: Astronomy; Astrophysics and Cosmology; Black holes; Couplings; Elementary Particles; Gravitation; Hadrons; Heavy Ions; Mathematical models; Measurement Science and Instrumentation; Nuclear Energy; Nuclear Physics; Physical properties; Physics; Physics and Astronomy; Quantum Field Theories; Quantum Field Theory; Regular Article - Theoretical Physics; String Theory
• ISSN: 1434-6044; 1434-6052
• DOI: 10.1140/epjc/s10052-017-4749-1

Dilatonic black hole dyon-like solutions in the gravitational 4 d model with a scalar field, two 2-forms, two dilatonic coupling constants λ i ≠ 0 , i = 1 , 2 , obeying λ 1 ≠ - λ 2 and the sign parameter ε = ± 1 for scalar field kinetic term are considered. Here ε = - 1 corresponds to a ghost scalar field. These solutions are defined up to solutions of two master equations for two moduli functions, when λ i 2 ≠ 1 / 2 for ε = - 1 . Some physical parameters of the solutions are obtained: gravitational mass, scalar charge, Hawking temperature, black hole area entropy and parametrized post-Newtonian (PPN) parameters β and γ . The PPN parameters do not depend on the couplings λ i and ε . A set of bounds on the gravitational mass and scalar charge are found by using a certain conjecture on the parameters of solutions, when 1 + 2 λ i 2 ε > 0 , i = 1 , 2 .