Physics – High Energy Physics
Scientific paper
Jun 2007
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2007aipc..917..116k&link_type=abstract
PARTICLES AND FIELDS: Proceedings of the VI Latin American Symposium on High Energy Physics and the XII Mexican School of Partic
Physics
High Energy Physics
Ordinary Neutrinos (Nuw Bosons, Neutrino Mass And Mixing, Decays Of Charmed Mesons, Decays Of Muons
Scientific paper
We calculate the yield and flavor content of high energy neutrinos produced in astrophysical sources with negligible magnetic fields varying their interaction depth. We take into account the scattering of secondaries on background photons as well as the direct production of neutrinos in decays of charm mesons. If multiple scattering of nucleons becomes important, the neutrino spectra from meson and muon decays are strongly modified with respect to transparent sources. Characteristic for neutrino sources containing photons as scattering targets is a strong energy-dependence of the ratio R0 of νμ and νe fluxes at the sources, ranging from R0 = φμ/φe ~ 0 below threshold to R0 ~ 4 close to the energy where the decay length of charged pions and kaons equals their interaction length on target photons. Above this energy, the neutrino flux is strongly suppressed and depends mainly on charm production.
Kachelrie M.
Tomas Ricard
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