Collision Of Ultra-relativistic Proton With Strong Magnetic Field:Production Of Ultra-high Energy Neutrinos And Photons&Applications

Ultra-high energy neutrino,means neutrinos with energies above TeV,the IceCube Neutrino Observatory which locates in Antarctica detects 80 neutrinos with energies be-tween 100 TeV and 10 PeV Proton-proton interaction and photo-hadronic interaction in cosmic accelerators are the two main channels for the production of cosmic ultra-high energy photons and neutrinos.In this dissertation,we use FWW approach to obtain the production of cosmic ultra-high energy photons and neutrinos from the collision be-tween UHE proton with magnetic field which could be considered as the virtual photon in the rest frame of UHE proton.We name this as pB process.The threshold for the occurrence of the pB process is that the combination of the Lorentz factor of proton and the strength of the magnetic field is about ?pB(?)5×1018 Gauss.Beyond this threshold,the rate of energy loss of proton due to the pB process is about three orders higher than that due to the synchrotron radiation of proton in the same magnetic field.We present the calculation method of the product neutrino and photon number spectrum of the pB process,and discuss its possible applications in the astrophysics environment,such as the white dwarf atmosphere,neutron star or stellar mass black hole,etc.Moreover,we extend the FWW approximation method to the photo-disintegration of heavy nuclei yields a similar effect "magneto-disintegration".At the same time,we focus on the application of the pB process in the stellar black hole binary merger.In the environment of a newly formed black hole,small amounts of plasma can support a strong magnetic field up to 1011 Gauss in a short time,and protons could be accelerated to?1017 eV which is limited by the curvature radiation.In the most optimistic estimation which consider no curvature cooling during the acceleration of protons,the maximum proton energy might be up to?1020 eV.After acceleration,in such extreme environment,the dominated energy loss process of proton is the pB process.The maximum energy of neutrino produced due to the pB process can reach to?10 EeV.In the case of GW 150914 detected by Advanced LIGO,the neutrino flux is estimated to be below the detection limit of IceCube.Neutrinos associating with the merging of nearby black hole binary with distance(?)5 Mpc could be detected by the current IceCube detector,and the diffuse neutrino background resulting from black hole mergers could be detected by the future IceCube-Gen2.