Emission of Cosmic Radio-waves, $X$- or $\gamma$-rays by Moving Unstable Particles at Late Times

TL;DR

This paper describes a quantum effect where unstable particles at late times can emit electromagnetic radiation, including X- or gamma-rays, due to their nonclassical behavior and large instantaneous energies, with potential astrophysical observational implications.

Contribution

It introduces a novel quantum mechanism for late-time electromagnetic emission from unstable particles, linking quantum decay behavior to astrophysical radiation phenomena.

Findings

Unstable particles can emit electromagnetic radiation at late times due to quantum effects.

The instantaneous energy of unstable particles can become very large during transition times.

This mechanism may explain some astrophysical X- or gamma-ray emissions.

Abstract

A new quantum effect connected with the late time behavior of decaying states is described and its possible observational consequences are analyzed: It is shown that charged unstable particles as well as neutral unstable particles with non--zero magnetic moment which live sufficiently long may emit electromagnetic radiation. This mechanism is due to the nonclassical behavior of unstable particles at late times (at the post exponential time region). Analyzing the transition times region between exponential and non-exponential form of the survival amplitude it is found that the instantaneous energy of the unstable particle can take very large values, much larger than the energy of this state at times from the exponential time region. Based on the results obtained for the model considered, it is shown that this new purely quantum mechanical effect may be responsible for causing unstable particles produced by astrophysical sources and moving with relativistic velocities to emit electromagnetic--, $X$-- or $\gamma$--rays at some time intervals from the transition time regions.