Short Time Behavior and Zeno Effect in Relativistic Quantum Field Theory

1997 ◽  
pp. 11-16
Author(s):  
Ramón F. Alvarez-Estrada ◽  
José L. Sánchez-Gómez
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Relativistic Quantum ◽  
Time Behavior ◽  
Quantum Field ◽  
Relativistic Quantum Field Theory ◽  
Zeno Effect ◽  
Short Time

scholarly journals DEVIATION FROM THE EXPONENTIAL DECAY LAW IN RELATIVISTIC QUANTUM FIELD THEORY: THE EXAMPLE OF STRONGLY DECAYING PARTICLES

2011 ◽  
Vol 26 (30) ◽  
pp. 2247-2259 ◽  
Author(s):  
FRANCESCO GIACOSA ◽  
GIUSEPPE PAGLIARA
Keyword(s):  
Field Theory ◽  
Quantum Field Theory ◽  
Exponential Decay ◽  
Relativistic Quantum ◽  
Decay Rates ◽  
Quantum Field ◽  
Relativistic Quantum Field Theory ◽  
Zeno Effect ◽  
Order Of Magnitude ◽  
Exponential Decay Law

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 lifetime. As a concrete example, the case of the ρ meson is studied.

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