Dynamics of spinning particles around a charged black-bounce spacetime

Abstract We investigate the dynamics of neutral spinning test particles in the charged black-bounce spacetime described by the Reissner–Nordström–Simpson–Visser metric, which interpolates between a Reissner–Nordström black hole and a traversable wormhole via the Simpson–Visser parameter l . Utilizing the Mathisson–Papapetrou–Dixon equations with the Tulczyjew spin-supplementary condition, we derive the equations of motion, effective potential, and conserved quantities for particles in the equatorial plane. The spin-curvature coupling introduces significant deviations from geodesic motion, affecting stable circular orbits and the innermost stable circular orbit. We analyze the superluminal bound, ensuring physically valid timelike trajectories, and find that the spin parameter s , electric charge Q , and l critically influence orbital stability and dynamics. Additionally, we study particle collisions, computing the critical angular momentum and center-of-mass energy, which reveal conditions for high-energy astrophysical processes, particularly in the black hole regime. Numerical results highlight the interplay between spin, electromagnetic effects, and the black-bounce geometry, with implications for accretion disks and gravitational wave signatures.