254 research outputs found
Ultrahigh Energy Tau Neutrinos
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.Comment: Invited talk given at the ``8th Workshop on Non-Perturbative Quantum
Chromodynamics", June 7-11, 2004, Paris, France; 10 pages, 6 figure
Jets and Jet Multiplicities in High Energy Photon-Nucleon Inetraction:
We discuss the theory of jet events in high-energy photon-proton interactions
using a model which gives a good description of the data available on total
inelastic cross sections up to =210 GeV. We show how to
calculate the jet cross sections and jet multiplicities and give predictions
for these quantities for energies appropriate for experiments at the HERA
collider and for very high energy cosmic ray observations.Comment: 12 pages + 4 figs, MAD/TH/92-8, submitted to Phys. Rev. D(Rapid
Communications), figs. available on request from [email protected]
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