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arXiv · 1005.4817

Deviation from the exponential decay law in relativistic quantum field theory: the example of strongly decaying particles

Francesco Giacosa·Giuseppe Pagliara
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Abstract

We show that a short-time regime, in which a deviation from the exponential decay law occurs, exists also in the framework of a superrenormalizable relativistic quantum field theory. This, in turn, implies the possibility of a quantum Zeno effect also for elementary decays. The attention is then focused on the typical order of magnitude of strong decay rates of mesons: for these particles, strong deviations from the exponential decay law are present during a period of time comparable with their mean life time. As a concrete example, the case of the $ρ$ meson is studied.

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Francesco Giacosa, Giuseppe Pagliara. 2011-10-12. Deviation from the exponential decay law in relativistic quantum field theory: the example of strongly decaying particles. https://doi.org/10.1142/s021773231103670x

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