1999/07/19 by Tetsuya Shiromizu · 1 citation
Physics and Astronomy · #Axion #Black Holes and Theoretical Physics #Classical mechanics #Cosmology and Gravitation Theories #Dilaton #Gravitation #Mathematical physics #Particle physics #Physics #Quantum Electrodynamics and Casimir Effect #Spin (aerodynamics) #Spinning #String (physics) #Test particle #astro-ph #gr-qc #hep-th
paper · pdf · doi:10.1103/physrevd.60.104046
published as Phys.Rev. D60 (1999) 104046 · 8 pages, references added, comments added, Phys. Rev. D accepted
arxiv created 1999/07/19 · openalex publication_date 1999/10/27 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05
We directly derive the classical equation of motion, which governs the center of mass of a test string, from the string action. In a certain case, the equation is basically the same as the one derived by Papapetrou, Dixon, and Wald for a test extended body. We also discuss the force balance using a stringy probe particle for an exact spinning multisoliton solution of Einstein-Maxwell-dilaton-axion theory. It is well known that the force balance condition yields the saturation of the Bogomol'nyi type bound in the lowest order. In the present formulation the gyromagnetic ratio of the stringy probe particle is automatically determined to be g=2, which is the same value as the background soliton. As a result we can confirm the force balance via the gravitational spin-spin interaction.