Synchrotron radiation and pair creation of massless charges in magnetic field

2016/12/18 by Gal'tsov, D. V.
#FOS: Physical sciences #High Energy Astrophysical Phenomena (astro-ph.HE) #High Energy Physics - Phenomenology (hep-ph) #High Energy Physics - Theory (hep-th)

paper · doi:10.48550/arxiv.1612.05981

Abstract

We study the massless limit in synchrotron radiation and one-photon pair creation in magnetic field. In this limit Schwinger critical field H₀=m²c³/(eℏ) tends to zero, so two characteristic quantum parameters η=H/H₀, χ=ηE/mc² are infinite, and the standard approximations used in analytical calculations fail. Applying Schwinger's proper time methods we derive simple expressions for synchrotron radiation spectra emitted by massless charges of spins s=0, 1/2 and the pair creation probability distribution in the quasiclassical (high Landau levels) regime exhibiting simple scaling properties and possessing universal spectral shapes.

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