TeV NEUTRINOS IN A DENSE MEDIUM
نویسنده
چکیده
The dispersion relation of energetic (few TeV) neutrinos traversing a medium is studied. We use the real time formalism of thermal field theory and we include the effects from the propagator of the W gauge boson. We consider then the MSW oscillations for cosmic neutrinos traversing the Earth, adopting for the neutrino parameters values suggested by the LSND results. It is found that the νμ flux, for neutrinos passing through the center of the Earth, will appear reduced by 15% for energies around 10 TeV. 1 e-mail addresses : [email protected], [email protected], [email protected]
منابع مشابه
Hidden Cosmic-Ray Accelerators as an Origin of TeV-PeV Cosmic Neutrinos.
The latest IceCube data suggest that the all-flavor cosmic neutrino flux may be as large as 10^{-7} GeV cm^{-2} s^{-1} sr^{-1} around 30 TeV. We show that, if sources of the TeV-PeV neutrinos are transparent to γ rays with respect to two-photon annihilation, strong tensions with the isotropic diffuse γ-ray background measured by Fermi are unavoidable, independently of the production mechanism....
متن کاملTeV Neutrinos from SuperNova Remnants embedded in Giant Molecular Clouds
The recent detection of γ-rays with energy up to 10 TeV from dense regions surrounding some Supernova Remnants (SNR) provides strong, though still not conclusive, evidence that the nucleonic component of galactic Cosmic Rays is accelerated in the supernova outflows. Neutrino telescopes could further support the validity of such scenario by detecting neutrinos coming from the same regions. We re...
متن کاملSearching for galactic cosmic ray pevatrons with multi–TeV gamma rays and neutrinos
The recent HESS detections of supernova remnant shells in TeV γ-rays confirm the theoretical predictions that supernova remnants can operate as powerful cosmic ray accelerators. If these objects are responsible for the bulk of galactic cosmic rays, then they should accelerate protons and nuclei to 10eV and beyond, i.e. act as cosmic PeVatrons. The model of diffusive shock acceleration allows, u...
متن کاملCoherent Neutrino Interactions in a Dense Medium
Motivated by the effect of matter on neutrino oscillations (the MSW effect) we study in more detail the propagation of neutrinos in a dense medium. The dispersion relation for massive neutrinos in a medium is known to have a minimum at nonzero momentum p ∼ GF ρ/ √ 2. We study in detail the origin and consequences of this dispersion relation for both Dirac and Majorana neutrinos both in a toy mo...
متن کاملHigh-energy neutrino emission from X-ray binaries
We show that high-energy neutrinos can be efficiently produced in X-ray binaries with relativistic jets and high-mass primary stars. We consider a system where the star presents a dense equatorial wind and the jet has a small content of relativistic protons. In this scenario, neutrinos and correlated gamma-rays result from pp interactions and the subsequent pion decays. As a particular example ...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
عنوان ژورنال:
دوره شماره
صفحات -
تاریخ انتشار 1999