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Limits on Coupling of ${{\mathit \mu}}$ to ${{\mathit \nu}_{{x}}}$ as Function of ${\mathit m}_{{{\mathit \nu}_{{x}}}}$

Limits on $\vert \mathit U_{1\mathit j}{\times }\mathit U_{2\mathit j}\vert $ as Function of ${\mathit m}_{{{\mathit \nu}_{{j}}}}$

VALUE

CL%

DOCUMENT ID

TECN

COMMENT

• • We do not use the following data for averages, fits, limits, etc. • •

$<3 \times 10^{-5}$

90

${\mathit m}_{{{\mathit \nu}_{{j}}}}$= 80 MeV

$<3 \times 10^{-6}$

90

${\mathit m}_{{{\mathit \nu}_{{j}}}}$= 160 MeV

$<6 \times 10^{-7}$

90

${\mathit m}_{{{\mathit \nu}_{{j}}}}$= 240 MeV

$<2 \times 10^{-7}$

90

${\mathit m}_{{{\mathit \nu}_{{j}}}}$= 320 MeV

$<9 \times 10^{-5}$

90

CNTR

${\mathit m}_{{{\mathit \nu}_{{j}}}}$=25 MeV

$<3.6 \times 10^{-7}$

90

CNTR

${\mathit m}_{{{\mathit \nu}_{{j}}}}$=100 MeV

$<3 \times 10^{-8}$

90

CNTR

${\mathit m}_{{{\mathit \nu}_{{j}}}}$=200 MeV

$<6 \times 10^{-9}$

90

CNTR

${\mathit m}_{{{\mathit \nu}_{{j}}}}$=350 MeV

$<0.01$

90

CNTR

${\mathit m}_{{{\mathit \nu}_{{j}}}}$=10 MeV

$<1 \times 10^{-5}$

90

CNTR

${\mathit m}_{{{\mathit \nu}_{{j}}}}$=140 MeV

$<7 \times 10^{-7}$

90

CNTR

${\mathit m}_{{{\mathit \nu}_{{j}}}}$=370 MeV

¹	BARANOV 1993 is a search for neutrino decays into ${{\mathit e}^{+}}{{\mathit e}^{-}}{{\mathit \nu}_{{e}}}$ using a beam dump experiment at the 70 GeV Serpukhov proton synchrotron.

References:

PL B302 336

Search for Heavy Neutrinos at the IHEP-JINR Neutrino Detector

PL 166B 479

Search for Neutrino Decay

PL 128B 361

A Search for Decays of Heavy Neutrinos

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