scholarly journals TRACING VERY HIGH ENERGY TAU NEUTRINOS FROM COSMOLOGICAL SOURCES IN ICE

2005 ◽  
Vol 20 (06) ◽  
pp. 1204-1211 ◽  
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.

scholarly journals ULTRAHIGH ENERGY TAU NEUTRINOS

2005 ◽  
Vol 20 (19) ◽  
pp. 4656-4663 ◽  
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.

scholarly journals Earth-Skimming Ultrahigh Energy Tau Neutrinos Simulated with Monte Carlo Method and CONEX Code

2021 ◽  
Vol 2021 ◽  
pp. 1-7
Author(s):  
Bouzid Boussaha ◽  
Tariq Bitam
Keyword(s):  
Monte Carlo ◽  
Cosmic Ray ◽  
High Energy ◽  
Tau Lepton ◽  
Ultrahigh Energy ◽  
Air Shower ◽  
Mountain Valley ◽  
Tau Neutrinos ◽  
Very High Energy ◽  
Very High

This paper is aimed at studying the feasibility of building an Earth-skimming cosmic tau neutrinos detector, with the aim of eventually identifying the ideal dimensions of a natural site mountain-valley for the detection of very high energy neutrinos tau range from 1 0 16 eV to 1 0 20 eV , as well as possibly locate one such site in Algeria. First, a Monte Carlo simulation of the neutrino-[mountain] matter interaction as well as the resulting decay of the tau lepton is conducted to determine the optimal dimensions of the mountain as well as the location of the tau decay in the valley. Second, a CORSIKA (COsmic Ray Simulation for KAscade) simulation with the CONEX option is conducted to track the evolution of the almost horizontal air shower initiated by the tau lepton. Many particles are produced, which are part of the shower components: electrons, muons, gammas, pions, etc. The study of the spatial distribution of these particles enables the discovery of the optimal width of the valley, and consequently, the distance at which to lay the detection network.

SEARCHING FOR SUPERSYMMETRY AT e+e− SUPERCOLLIDERS

1989 ◽  
Vol 04 (16) ◽  
pp. 4111-4163 ◽  
Author(s):  
HOWARD BAER ◽  
A. BARTL ◽  
DEBRA KARATAS ◽  
W. MAJEROTTO ◽  
XERXES TATA
Keyword(s):  
Large Angle ◽  
High Energy ◽  
Supersymmetric Particle ◽  
Model Parameters ◽  
Ultrahigh Energy ◽  
Mixing Angles ◽  
Missing Transverse Momentum ◽  
Very High Energy ◽  
The Masses ◽  
Very High

We study the signals resulting from the production and subsequent decays of heavy sleptons, sneutrinos and all the charginos [Formula: see text] and neutralinos [Formula: see text] at ultrahigh energy e+e− colliders. In contrast to existing studies that assume that supersymmetric particles directly decay to the lightest supersymmetric particle (taken here to be the lightest neutralino, [Formula: see text]) which then escapes detection, we incorporate realistic decay patterns using the minimal supersymmetry model as a guide for the masses and mixing angles in the gaugino-Higgsino sector. We show that very heavy sleptons and sneutrinos often decay into heavier charginos and neutralinos which themselves often decay into real W and Z0 bosons and lighter [Formula: see text]'s and [Formula: see text]'s. This results in a considerably softer missing transverse momentum [Formula: see text] spectrum than would be expected if sparticles decayed directly to the [Formula: see text] so that [Formula: see text] is not necessarily a viable signature for very heavy sparticles. We show that the optimal signature for supersymmetry in very high energy e+e− collisions depends on the model parameters. Whereas [Formula: see text] is a viable signature for lighter sleptons and sneutrinos (m ~ 0.3 TeV ), the production of very heavy sparticles is signalled by events with two or more large angle W and Z0 bosons and often a very hard electron. We discuss strategies for extracting the SUSY signal and argue that it can be separated from standard model backgrounds over the whole of parameter space.

WHAT DO WE MEAN BY DETECTING EARTH-SKIMMING NEUTRINOS?

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.

scholarly journals Atmospheric muon and neutrino fluxes at very high energy

2011 ◽  
Vol 34 (9) ◽  
pp. 663-673 ◽  
Author(s):  
José I. Illana ◽  
Paolo Lipari ◽  
Manuel Masip ◽  
Davide Meloni
Keyword(s):  
High Energy ◽  
Very High Energy ◽  
Atmospheric Muon ◽  
Neutrino Fluxes ◽  
Very High
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