The basic concepts of neutrino physics are presented at a level appropriate for integration into elementary courses on quantum mechanics and/or modern physics.

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Often quoted is Rabi’s remark about the discovery of the muon—“Who ordered that?”
9.
Of course, decay of the π+ to an electron and neutrino is also possible but is highly suppressed for helicity reasons, as we shall subsequently discuss.
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J. D. Bjorken and S. D. Drell, Relativistic Quantum Mechanics (McGraw–Hill, New York, 1965).
13.
In principle there could be right-handed neutrinos present, but they could not interact and hence we would not be aware of their presence.
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M.
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,
L.
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, and
A.
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Phys. Rev. D
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, “
Double Beta Decay
,”
Prog. Part. Nucl. Phys.
12
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(
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).
17.
See, for example, talks by H. V. Klapdor-Kleingrothaus and A. Morales, Neutrino ’98, Takayama, Japan, June, 1998.
18.
C. S. Wu, “The Experimental Determination of the Beta-Interaction—(B) the Rest Mass of the Electron,” in Alpha-, Beta- and Gamma-Ray Spectroscopy, edited by K. Siegbahn (North-Holland, Amsterdam, 1965), Vol. 2, pp. 1391–1396.
19.
K.-E.
Bergkvist
, “
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V. A.
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E. G.
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V. Z.
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E. F.
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V. S.
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Phys. Lett.
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21.
The constant in front of the neutrino expression differs from the corresponding photon number because of the use of Fermi rather than Bose statistics
22.
R. G. H.
Robertson
et al., “
Limit on Electron Antineutrino Mass from Observation of the β-Decay of Molecular Tritium
,”
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24.
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The Highly Collapsed Configurations of Stellar Mass
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L. D.
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On the Theory of Stars
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originally published in
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26.
B.
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Neutrino Experiments and the Problem of Conservation of Leptonic Charge
,”
Sov. Phys. JETP
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,
984
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(
1968
).
27.
The ν̄e’s come from both the fraction of μ’s that decay via μ→e+ν̄eμ and from the small percentage of negatively charged pions that decay via π→e+ν̄e.
28.
C.
Athanassopoulos
et al., “
Candidate Events in a Search forν̄μ→ν̄e Oscillations
,”
Phys. Rev. Lett.
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2650
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(
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C.
Athanassopoulos
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,”
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29.
Y.
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,”
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30.
M. Gell-Mann, P. Ramond, and R. Slansky, in Supergravity, edited by P. van Hiewenhuizen and D. Z. Freedman (North-Holland, Amsterdam, 1979), p. 315;
T. Tanagida, in “Proceedings of the Workshop on the Unified Theory and Baryon Number in the Universe,” edited by O. Sawada and A. Sugamoto (unpublished), p. 95.
31.
F. Wilczek, talk presented at Neutrino ’98, Takayama, Japan, June, 1998.
32.
J. N.
Bahcall
,
S.
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, and
M. H.
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A. S.
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S.
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, and
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,”
Ap. J.
506
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(
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33.
R.
Davis
,Jr.
,
D. S.
Harmer
, and
K. C.
Hoffman
, “
Search for Neutrinos from the Sun
,”
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20
,
1205
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R.
Davis
, Jr.
,
D. S.
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K. C.
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, “
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,”
Prog. Part. Nucl. Phys.
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34.
Y.
Fukuda
et al., “
Solar Neutrino Data Covering Solar Cycle 22
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35.
R.
Anselmann
et al., “
GALLEX Results from the First 30 Solar Neutrino Runs
,”
Phys. Lett. B
327
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385
(
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R.
Anselmann
et al., “
First Results from theCr51 Neutrino Source Experiment with the GALLEX Detector
,”
Phys. Lett. B
342
,
440
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(
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J. N.
Abdurashitov
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Results from SAGE
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Phys. Lett. B
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36.
V.
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,
K.
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, and
R. J. N.
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, “
Realistic Calculations of Solar-Neutrino Oscillations
,”
Phys. Rev. D
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,
538
541
(
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);
S. L.
Glashow
and
L. M.
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, “
Just So Oscillations
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37.
S. P.
Mikheyev
and
A. Yu.
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, “
Resonance Enhancement of Oscillations in Matter and Solar Neutrino Spectroscopy
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Sov. J. Nucl. Phys.
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S. P.
Mikheyev
and
A. Yu.
Smirnov
, “
Resonant Amplification of ν Oscillation in Matter and Solar Neutrino Spectroscopy
,”
Nuovo Cimento C
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38.
L.
Wolfenstein
, “
Neutrino Oscillations in Matter
,”
Phys. Rev. D
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39.
H.
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,”
Phys. Rev. Lett.
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40.
W. C.
Haxton
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S. J.
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G. T.
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