  In this paper we calculate pair production from bremsstrahlung as a classical
effect in Stueckelberg-Horwitz-Piron electrodynamics. In this framework,
worldlines are traced out dynamically through the evolution of events
$x^\mu(\tau)$ parameterized by a chronological time $\tau$ that is independent
of the spacetime coordinates. These events, defined in an unconstrained 8D
phase space, interact through five $\tau$-dependent gauge fields induced by the
event evolution. The resulting theory differs in its underlying mechanics from
conventional electromagnetism, but coincides with Maxwell theory in an
equilibrium limit. In particular, the total mass-energy-momentum of particles
and fields is conserved, but the mass-shell constraint is lifted from
individual interacting events, so that the standard Feynman-Stueckelberg
interpretation of pair creation/annihilation is implemented in classical
mechanics.
