International School of Cosmic Ray Astrophysics
14th Course: "Neutrinos and Explosive Events in the Universe"
A NATO Advanced Study Institute
2-13 July 2004
Ettore Majorana Centre
Erice, Sicily, Italy
Topic: Introduction to High Energy Neutrino Astronomy
Lecturer: Emilio Migneco
Many indications suggest that the observed Ultra High Energy Cosmic Rays (E >1018 eV) could be produced in astrophysical sources, namely GRBs and AGNs, where Fermi acceleration mechanism of charged particles takes place. Accelerated nuclei undergo photomeson production with the ambient photon field, or hadronic interactions with ambient gas, producing high energy neutrinos. Differently from charged particles and >TeV gamma rays, neutrinos can reach the Earth travelling in straight line, from sources at cosmological distances.
The construction of large volume (km3 scale) neutrino detectors, capable to reconstruct the particle direction, will open the way to high energy neutrino astronomy and will shed new light in the solution of puzzling questions such as the identification of UHECR sources.
Galactic SNRs and, more recently, microquasars have been proposed as intense sources of TeV neutrinos; their detection could provide strong constraints of sources physics models.
High energy neutrino production mechanisms. Proposed astrophysical sources and the expected neutrino fluxes. Atmospheric muons and neutrinos background.
T.K.Gaisser, F.Halzen and T.Stanev,
Phys. Rep. 58 (1995) 173.
J.G. Learned and K.Mannheim, Ann. Rev. of Nuc. and Part. Science, 50 (2000) 679.
E. Waxman, Nucl. Phys. Proc.Suppl. 118 (2003) 353 and astro-ph/0211358.
F. Halzen, astro-ph/0402083
T. Montaruli astro-ph/0312558
On the web:
John Learned home page:
John Bahcall home page: http://www.sns.ias.edu/~jnb/
Francis Halzen home page: http://pheno.physics.wisc.edu/~halzen/
Smoot group page: http://aether.lbl.gov/www/projects/neutrino/