Upper limit on the magnetic moment of the neutrino
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Date
1982
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Abstract
We have recalculated the processes
e
ν
→
e
ν
and
e
+
e
−
→
ν
¯
ν
due to an assumed magnetic moment
κ
of the neutrino (correcting some errors in the previous calculations). Comparing the results with the Fermi and electroweak models we set a suggestive limit
κ
≲
(
gm
e
M
Z
)
2
μ
0
, where
m
is the electron mass and
μ
0
=
e
2
m
. A very sensitive method to set a good upper limit would be to measure the angular distribution of
e
ν
→
e
ν
near the forward direction.