Energy Loss of Ultrahigh Energy Protons in Strong Magnetic Fields
نویسندگان
چکیده
Ultrahigh energy protons in magnetic fields produce pions and thus lose energy. The mean free path of such a process is worked out for Gaussian random fields. Two cases are considered: an isotropic and a cylindrically symmetric distribution. The energy loss is proportional to E3〈B2〉; it becomes significant for protons of energies > ∼ 10 19eV and magnetic fields B > ∼ 10 9Gauss. For energies and magnetic fields of this magnitude, a proton injected into the magnetic field loses a substantial fraction of its initial energy due to pion production. PACS: 13.85.Tp, 98.70.Sa, 98.70Rz
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