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Spinning test particles in the spacetime of a global monopole

Morteza Mohseni1,2,* and Saurya Das1,†

  • 1Theoretical Physics Group, Department of Physics and Astronomy and Quantum Horizons Alberta, University of Lethbridge, 4401 University Drive, Lethbridge, Alberta T1K 3M4, Canada
  • 2Physics Department, Payame Noor University, Tehran 19395-3697, Iran

  • *Contact author: morteza.mohseni@uleth.ca, m-mohseni@pnu.ac.ir
  • †Contact author: saurya.das@uleth.ca
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Phys. Rev. D 113, 124037 – Published 12 June, 2026

DOI: https://doi.org/10.1103/8k8z-nbdl

Abstract

We investigate the motion of spinning test particles in the spacetime of a global monopole in the framework of the Mathisson-Papapetrou-Dixon equations. By making use of the symmetries of the spacetime, we obtain a general exact solution to the equations of motion. We show that the particle’s trajectories, momenta, and spin can be expressed in terms of three specific functions of the polar and azimuthal angles. We also show that the system is completely integrable. We obtain the general nongeodesic trajectory of the particle, and also examine the particular cases of radial and planar motion. We compare the nongeodesic trajectories of a spinning particle with a nonspinning particle.

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Outline

Information

Phys. Rev. D 113, 124037– Published 12 June, 2026
  • Received 5 December 2025
  • Accepted 20 May 2026
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