Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
1999-06-25
AIP Conf.Proc.490:80-124,1999
Physics
High Energy Physics
High Energy Physics - Phenomenology
45 pages, 12 figures, Latex file, to be published in in The Proceedings of the VIII Escuela Mexicana de Particulas y Campos
Scientific paper
10.1063/1.1301383
These lectures describe some aspects of the physics of massive neutrinos. After a brief introduction of neutrinos in the Standard Model, I discuss possible patterns for their masses. In particular, I show how the presence of a large Majorana mass term for the right-handed neutrinos can engender tiny neutrino masses for the observed neutrinos. If neutrinos have mass, different flavors of neutrinos can oscillate into one another. To analyze this phenomena, I develop the relevant formalism for neutrino oscillations, both in vacuum and in matter. After reviewing the existing (negative) evidence for neutrino masses coming from direct searches, I discuss evidence for, and hints of, neutrino oscillations in the atmosphere, the sun, and at accelerators. Some of the theoretical implications of these results are emphasized. I close these lectures by briefly outlining future experiments which will shed further light on atmospheric, accelerator and solar neutrino oscillations. A pedagogical discussion of Dirac and Majorana masses is contained in an appendix.
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