Electron-Positron Pair Production

Because processes forbidden in vacuum become possible in external fields in modern physics the problem of particle interaction with external electromagnetic fields is of considerable interest. One example of such a process is production of electron-positron pair with neutrinos which though impossible in vacuum happens in high intensity laser field. The event would make sense if the process is carried out with astronomical and cosmological sources of neutrinos and fields. Because in astronomical phenomena where the magnetic field strengths can reach very high magnitudes there exists the possibility of significant stimulation of this interaction.