A Search for Very High Energy Neutrinos from Active Galactic Nuclei
J. W. Bolesta, H. Bradner, U. Camerini, J. Clem, S. T. Dye, J. George, P. W. Gorham, P. K. F. Grieder, J. Hauptman, T. Hayashino, M. Jaworski, T. Kitamura, S. Kondo, J. G. Learned, R. March, T. Matsumoto, S. Matsuno, K. Mauritz, P. Minkowski, T. Narita, D. J. O'Connor, Y. Ohashi, A. Okada, V. Peterson, V. J. Stenger, S. Uehara, M. Webster, R. J. Wilkes, K. K. Young, A. Yamaguchi
Abstract
We report the results of a search for neutrino-induced particle cascades using a deep ocean water Cherenkov detector. The effective mass of the detector, a string of seven 40 cm diameter photomultipliers at 5.2 m spacing, is found through simulation analysis to be surprisingly large: greater than 1 megaton of water at incident neutrino energies of 1 PeV. We find no evidence for neutrino-induced cascades in 18.6 hours of observation. Although the limit implied by this observation is the strongest yet for predictions of active galatic nuclei (AGN) neutrinos at energies above 100 TeV, perhaps the more intriguing result is that the power of these techniques can be exploited to test these AGN models in a relatively short time.
Create a lesson
Related papers
On binary pulsars and the force of gravity
Davor Palle
Tidal torques. A critical review of some techniques
Michael Efroimsky, James G. Williams
Dynamics of a Spherical Accretion Shock with Neutrino Heating and Alpha-Particle Recombination
Rodrigo Fernández, Christopher Thompson
Asymptotically FRW black holes
J. T. Firouzjaee, Reza Mansouri
Reaction of Accretion Disks to Abrupt Mass Loss During Binary Black Hole Merger
Sean M. O'Neill, M. Coleman Miller, Tamara Bogdanovic et al.
A Gamma-Ray Burst/Pulsar for Cosmic-Ray Positrons with a Dark Matter-like Spectrum
Kunihito Ioka