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Published December 1, 1984 | public
Journal Article Open

Low-energy neutrino physics and neutrino mass


Among the principal concerns in neutrino physics today are the questions of whether neutrinos are massive and, if so, whether the neutrinos emitted in a weak decay are pure or mixed quantum states. The concept of mixed neutrinos has been with us for more than 20 years, having first been introduced by Maki et al (1) and by Pontecorvo (2) following demonstration in 1962 that more than one type (flavor) of neutrino existed. After having been dormant for some time, the interest in these issues was reborn in recent years with the advent of grand unified theories, which predict nonvanishing neutrino mass and which can accommodate eutrino mixing, in a natural way. Controversial experiments also refueled the excitment (and consternation) of researchers in this endeavor.

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"Reprinted, with permission, from the Annual Review of Nuclear and Particle Science, Volume 34 copyright 1984 by Annual Reviews, www.annualreviews.org" This review was initiated at the Aspen Center for Physics; its hospitality and stimulating atmosphere are appreciated. Enlightening discussions with V. L. Telegdi are gratefully acknowledged. The work was supported by the US Department of Energy under Contract DEAT-03-81ER40002.


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