Anomalous Lifetime of Ball Lightning Explained by Langevin Dynamics in a Metastable Magnetic Potential

The phenomenon of Ball Lightning (BL) presents a longstanding paradox in plasma physics: a self-confined plasma structure that persists for seconds or minutes, orders of magnitude longer than the millisecond timescales predicted by virial theorem and resistive decay in atmospheric conditions. Existing theories, ranging from burning silicon nanospheres to microwave cavities, often struggle to unify the formation, stability, and eventual explosive termination of BL within a single framework. In this work, we apply the Unified Statistical Reconnection Model (USRM) to describe BL as a "Natural Spheromak" trapped in a metastable magnetic potential well. By modeling the topological evolution using Generalized Langevin Dynamics, we show that the BL lifetime is governed by the Kramers escape rate, where stability is maintained by a high magnetic tension barrier relative to the atmospheric turbulence noise. We detail the mechanism of "Stochastic Capture," where the rapid decay of turbulence following a lightning strike traps the plasmoid in a stable state. Furthermore, we demonstrate via numerical simulation that the "Silent" phase corresponds to the system residing in the potential well (x ≈ −1), sustained by internal toroidal currents estimated at 10-50 kA. The eventual "Explosion" is modeled as a noise-induced phase transition triggered by external perturbations. Finally, we propose a laboratory experiment to verify this model using controlled RF noise injection.