A New Era of Particle Accelerators: The Absolute Cost of Time

Modern particle accelerators are no longer limited solely by beam energy, stability, or RF system performance, but increasingly by time-critical real-time decision processes: event triggering, machine protection, and beam stabilization. These processes operate under extreme information fluxes, strict latency constraints, and are inherently irreversible—each decision implies the loss of alternatives and therefore information, which is tied to energy dissipation. This work formulates a physical framework linking the energetic cost of decisions, the volume of processed information, and the finite time in which decisions must occur. It is shown that in regimes of extreme experimental metrology (e.g., LHC/HL-LHC), time becomes a fundamentally limited resource. The central objective is to demonstrate that future accelerator optimization must be driven by minimizing decision overhead and explicitly accounting for the energy–information–time balance. The framework provides measurable tools for analyzing detector architectures and trigger systems, offering a new perspective on the physical limits of experimental facilities.