ATMOSPHERIC AND GALACTIC TAU NEUTRINOS

Neutrinos with energy greater than GeV are copiously produced in the p(A,p) interactions occurring in the earth atmosphere and in our galactic plane. A comparison of the tau and mu neutrino flux in the presence of neutrino oscillations from these two astrophysical sites is presented. It is pointed out that the galactic plane tau neutrino flux dominates over the downward going atmospheric tau neutrino flux at much lower energy value than that for the dominance of the mu neutrino flux from these two sites. Future prospects for possible observations of galactic tau neutrino flux are also briefly mentioned.

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WHAT DO WE MEAN BY DETECTING EARTH-SKIMMING NEUTRINOS?

Modern Physics Letters A ◽

10.1142/s021773230401446x ◽

2004 ◽

Vol 19 (13n16) ◽

pp. 1125-1132

Author(s):

GUEY-LIN LIN

Keyword(s):

Neutrino Flux ◽

Tau Lepton ◽

Tau Neutrino ◽

Flavor Oscillations ◽

Tau Neutrinos ◽

Detection Strategy ◽

The Earth ◽

Neutrino Flavor ◽

Neutrino Fluxes

In this talk, we elaborate the strategy for detecting the Earth-skimming tau neutrinos. We first show that there are non-negligible astrophysical tau neutrino fluxes due to neutrino flavor oscillations. We then illustrate the idea of detecting Earth-skimming tau neutrinos. In particular, we point out that the tau-lepton flux resulting from neutrino-nucleon scatterings inside the earth is controlled by the tau-lepton range. We demonstrate this observation by showing the tau-lepton flux induced by the GZK tau-neutrino flux. The question on the energy resolutions of tau neutrinos in this detection strategy is briefly discussed.

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The DsTau Experiment: A Study for Tau-Neutrino Production

Particles ◽

10.3390/particles3010013 ◽

2020 ◽

Vol 3 (1) ◽

pp. 164-168

Author(s):

Mădălina Mihaela Miloi ◽

Keyword(s):

Cross Section ◽

Present Report ◽

Neutrino Flux ◽

Interaction Cross Section ◽

Muon Neutrinos ◽

Tau Neutrino ◽

Neutrino Sector ◽

Neutrino Production ◽

Lepton Universality ◽

Tau Neutrinos

For clarifying the validity of the Lepton Universality hypothesis, one of the fundamental statements of the Standard Model, the interaction cross section for all three flavors of leptons have to be known with high precision. In neutrino sector, for electron and muon neutrinos, the interaction cross section is known fairly well, but for tau neutrino only poor estimations exist. In particular, the most direct measurement by the DONuT experiment was performed with rather poor accuracy due to low statistics and an uncertainty of the tau neutrino flux. The DsTau experiment proposes to study tau-neutrino production process and thus to improve significantly the accuracy of calculations of tau neutrino flux for neutrino accelerator experiments. To study reactions providing most of tau neutrinos, the experiment uses a setup based on high resolution nuclear emulsions, capable to register short lived particle decays created in proton-nucleus interactions. The present report is an overview of the DsTau experiment together with some of the preliminary results from the pilot run.

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ULTRAHIGH ENERGY TAU NEUTRINOS

International Journal of Modern Physics A ◽

10.1142/s0217751x0502834x ◽

2005 ◽

Vol 20 (19) ◽

pp. 4656-4663 ◽

Cited By ~ 1

Author(s):

J. JONES ◽

I. MOCIOIU ◽

I. SARCEVIC ◽

M. H. RENO

Keyword(s):

Energy Loss ◽

Active Galactic Nuclei ◽

Galactic Nuclei ◽

The Other ◽

Ultrahigh Energy ◽

Tau Neutrino ◽

Tau Neutrinos ◽

The Earth ◽

Astrophysical Neutrinos ◽

Neutrino Fluxes

We study ultrahigh energy astrophysical neutrinos and the contribution of tau neutrinos from neutrino oscillations, relative to the contribution of the other flavors. We show the effect of tau neutrino regeneration and tau energy loss as they propagate through the Earth. We consider a variety of neutrino fluxes, such as cosmogenic neutrinos and neutrinos that originate in Active Galactic Nuclei. We discuss signals of tau neutrinos in detectors such as IceCube, RICE and ANITA.

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TRACING VERY HIGH ENERGY TAU NEUTRINOS FROM COSMOLOGICAL SOURCES IN ICE

International Journal of Modern Physics A ◽

10.1142/s0217751x05024092 ◽

2005 ◽

Vol 20 (06) ◽

pp. 1204-1211 ◽

Cited By ~ 3

Author(s):

J. JONES ◽

I. MOCIOIU ◽

I. SARCEVIC ◽

M. H. RENO

Keyword(s):

High Energy ◽

Ultrahigh Energy ◽

Tau Neutrino ◽

Tau Neutrinos ◽

The Earth ◽

Very High Energy ◽

Charged Leptons ◽

Neutrino Fluxes ◽

In Transit ◽

Very High

Astrophysical sources of ultrahigh energy neutrinos yield tau neutrino fluxes due to neutrino oscillations. We study in detail the contribution of tau neutrinos with energies above 106 GeV relative to the contribution of the other flavors. We consider several different initial neutrino fluxes and include tau neutrino regeneration in transit through the Earth and energy loss of charged leptons. We discuss signals of tau neutrinos in detectors such as IceCube, RICE and ANITA.

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CONFRONTING HEAVY TAU NEUTRINOS WITH NEUTRINO OSCILLATIONS

Modern Physics Letters A ◽

10.1142/s0217732301005023 ◽

2001 ◽

Vol 16 (26) ◽

pp. 1699-1702 ◽

Cited By ~ 2

Author(s):

CHUN LIU

Keyword(s):

Neutrino Mass ◽

Neutrino Oscillations ◽

Electron Neutrino ◽

Supersymmetric Model ◽

Tau Neutrino ◽

Tau Neutrinos ◽

Mass Pattern

If the tau neutrino is as heavy as 10 MeV which may have certain astrophysical implications, the neutrino mass pattern is studied so as to accommodate the new oscillation observations. It predicts that the electron neutrino has Marjorana mass around 0.05 eV. A supersymmetric model is described to realize the above scenario.

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