Anomalous Bremsstrahlung and the Structure of Cosmic-Ray Electron–Positron Fluxes at the GeV–TeV Energy Range

Abstract

Abstract We reveal that the energy spectra of electrons–positrons in primary cosmic rays measured at atmosphere tops have double structures: an excess component around , which originates from a strong e + e −-source. and the distorted background . We supposed that the difference between AMS-CALET and Fermi-LAT-DAMPE data originates from the energy loss of the fluxes due to the anomalous bremsstrahlung effect at a special window. The evolution of spectra under the anomalous bremsstrahlung effect satisfies an improved electromagnetic cascade equation. The above spectra are parameterized and they can be used for further physics studies. We suggest checking previous applications of the Bethe–Heitler formula when studying the propagation of high-energy electrons and photons.