Tau neutrinos from active galactic nuclei
نویسنده
چکیده
We study the appearance of ντ from active galactic nuclei (AGN) through neutrino spin-flip. We consider two situations: i) Spin (flavour)-precession in a reasonable strength of magnetic field in AGN, BAGN ii) Adiabatically resonant conversions caused by an interplay of BAGN and the violation of equivalence principle. Observational consequences for both situations are discussed.
منابع مشابه
High Energy Cosmic Tau Neutrinos
In this contribution i discuss the possibility of production of high energy cosmic tau neutrinos (E ≥ 10 GeV) in cores of Active Galactic Nuclei (AGN) originating from proton acceleration. The effects of three flavour neutrino mixing on this high energy cosmic tau neutrino flux and the prospects for its observations through double shower events [1]. In addition to AGNs, high energy cosmic tau n...
متن کاملNeutrino probe of cosmic ray astrophysics and new physics at sub-fermi distances
We show that if the evolution of cosmic ray sources follows that of active galactic nuclei, the upper limit on the diffuse flux of tau neutrinos from the Pierre Auger Observatory marginally constrains the proton fraction at the end of the energy spectrum. We also discuss prospects to uncover new physics leptophobic interactions using future Auger data.
متن کاملTau Neutrino Appearance with a 1000 Megaparsec Baseline
A high-energy neutrino telescope, such as the operating AMANDA detector, may detect neutrinos produced in sources, possibly active galactic nuclei or gamma-ray bursts, distant by a thousand megaparsecs. These sources produce mostly νe or νμ neutrinos. Above 1 PeV, νe and νμ are absorbed by charged-current interactions in the Earth before reaching the opposite surface. However, the Earth never b...
متن کاملMomentum-dependent contributions to the gravitational coupling of neutrinos in a medium
When neutrinos travel through a normal matter medium, the electron neutrinos couple differently to gravity compared to the other neutrinos, due to the presence of electrons in the medium and the absence of the other charged leptons. We calculate the momentum-dependent part of the matter-induced gravitational couplings of the neutrinos under such conditions, which arise at order g/M W , and dete...
متن کاملNeutrino Conversions in Active Galactic Nuclei
I discuss the possibility of production of high energy cosmic neutrinos (E ≥ 10 GeV) in cores of active galactic nuclei and study some of the effects of neutrino mixing on their subsequent propagation. I also discuss the prospects for observations of these high energy cosmic neutrinos in new km surface area underwater/ice neutrino telescopes.
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 1998