Solutions to the Atmospheric Neutrino Problem

Abstract

In this talk I review the present status of the atmospheric neutrino anomaly and discuss some solutions that have been presented in the literature to solve this problem. In particular I review the "standard" solution in terms of neutrino oscillations as well as alternative scenarios such as the possibility of flavour changing neutrino interactions with the Earth and neutrino decay.

Comments: 11 pages, 5 postscrpt figures. Talk given at the Xth Baksan School "Particles and Cosmology", 19-25 April 1999, Baksan Valley, Kabardino-Balkaria, Russia, and at the 5th International Workshop ``Valencia 99: Particles in Astrophysics and Cosmology'', May 3-8, 1999,Valencia, Spain