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Flavor conversion of cosmic neutrinos from hidden jets

  • Soebur Razzaque
  • A. Yu. Smirnov
Article

Abstract

High energy cosmic neutrino fluxes can be produced inside relativistic jets under the envelopes of collapsing stars. In the energy range E ∼ (0.3 − 105)GeV, flavor conversion of these neutrinos is modified by various matter effects inside the star and the Earth. We present a comprehensive (both analytic and numerical) description of the flavor conversion of these neutrinos which includes:
  1. (i)

    oscillations inside jets,

     
  2. (ii)

    flavor-to-mass state transitions in an envelope,

     
  3. (iii)

    loss of coherence on the way to observer, and

     
  4. (iv)

    oscillations of the mass states inside the Earth.

     

We show that conversion has several new features which are not realized in other objects, in particular interference effects (“L- and H- wiggles”) induced by the adiabaticity violation. The ν − ν scattering inside jet and inelastic neutrino interactions in the envelope may produce some additional features at E ≳ 104 GeV.We study dependence of the probabilities and flavor ratios in the matter-affected region on angles θ 13 and θ 23, on the CP-phase δ, as well as on the initial flavor content and density profile of the star. We show that measurements of the energy dependence of the flavor ratios will, in principle, allow to determine independently the neutrino and astrophysical parameters.

Keywords

Neutrino Physics Electromagnetic Processes and Properties 

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Copyright information

© SISSA, Trieste, Italy 2010

Authors and Affiliations

  1. 1.Space Science DivisionU.S. Naval Research LaboratoryWashingtonU.S.A.
  2. 2.The Abdus Salam International Centre for Theoretical PhysicsTriesteItaly
  3. 3.Institute for Nuclear Research of Russian Academy of SciencesMoscowRussia

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