Limits on $\vert \mathit U_{{{\mathit e}}\mathit x}\vert ^2$ as Function of ${\mathit m}_{{{\mathit \nu}_{{{x}}}}}$

Peak and kink search tests

INSPIRE   JSON  (beta) PDGID:
S077U1A
Limits on $\vert \mathit U_{{{\mathit e}}\mathit x}\vert ^2$ as function of ${\mathit m}_{{{\mathit \nu}_{{{j}}}}}$
VALUE CL% DOCUMENT ID TECN  COMMENT
$\bf{<1 \times 10^{-7}}$ 90 1
BRITTON
1992B
 CNTR 50 MeV $<$ ${\mathit m}_{{{\mathit \nu}_{{{x}}}}}<$ 130 MeV
• • We do not use the following data for averages, fits, limits, etc. • •
$<5 \times 10^{-6}$ 90
DELEENER-ROSI..
1991
${\mathit m}_{{{\mathit \nu}_{{{x}}}}}$=20 MeV
$<5 \times 10^{-7}$ 90
DELEENER-ROSI..
1991
${\mathit m}_{{{\mathit \nu}_{{{x}}}}}$=40 MeV
$<3 \times 10^{-7}$ 90
DELEENER-ROSI..
1991
${\mathit m}_{{{\mathit \nu}_{{{x}}}}}$=60 MeV
$<1 \times 10^{-6}$ 90
DELEENER-ROSI..
1991
${\mathit m}_{{{\mathit \nu}_{{{x}}}}}$=80 MeV
$<1 \times 10^{-6}$ 90
DELEENER-ROSI..
1991
${\mathit m}_{{{\mathit \nu}_{{{x}}}}}$=100 MeV
$<5 \times 10^{-7}$ 90
AZUELOS
1986
CNTR ${\mathit m}_{{{\mathit \nu}_{{{x}}}}}$=60 MeV
$<2 \times 10^{-7}$ 90
AZUELOS
1986
CNTR ${\mathit m}_{{{\mathit \nu}_{{{x}}}}}$=80 MeV
$<3 \times 10^{-7}$ 90
AZUELOS
1986
CNTR ${\mathit m}_{{{\mathit \nu}_{{{x}}}}}$=100 MeV
$<1 \times 10^{-6}$ 90
AZUELOS
1986
CNTR ${\mathit m}_{{{\mathit \nu}_{{{x}}}}}$=120 MeV
$<2 \times 10^{-7}$ 90
AZUELOS
1986
CNTR ${\mathit m}_{{{\mathit \nu}_{{{x}}}}}$=130 MeV
$<1 \times 10^{-4}$ 90 2
BRYMAN
1983B
 CNTR ${\mathit m}_{{{\mathit \nu}_{{{x}}}}}$=5 MeV
$<1.5 \times 10^{-6}$ 90
BRYMAN
1983B
 CNTR ${\mathit m}_{{{\mathit \nu}_{{{x}}}}}$=53 MeV
$<1 \times 10^{-5}$ 90
BRYMAN
1983B
 CNTR ${\mathit m}_{{{\mathit \nu}_{{{x}}}}}$=70 MeV
$<1 \times 10^{-4}$ 90
BRYMAN
1983B
 CNTR ${\mathit m}_{{{\mathit \nu}_{{{x}}}}}$=130 MeV
$<1 \times 10^{-4}$ 68 3
SHROCK
1981
THEO ${\mathit m}_{{{\mathit \nu}_{{{x}}}}}$=10 MeV
$<5 \times 10^{-6}$ 68 3
SHROCK
1981
THEO ${\mathit m}_{{{\mathit \nu}_{{{x}}}}}$=60 MeV
$<1 \times 10^{-5}$ 68 4
SHROCK
1980
THEO ${\mathit m}_{{{\mathit \nu}_{{{x}}}}}$=80 MeV
$<3 \times 10^{-6}$ 68 4
SHROCK
1980
THEO ${\mathit m}_{{{\mathit \nu}_{{{x}}}}}$=160 MeV
1  BRITTON 1992B is from a search for additional peaks in the ${{\mathit e}^{+}}$ spectrum from ${{\mathit \pi}^{+}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit \nu}_{{{e}}}}$ decay at TRIUMF. See also BRITTON 1992.
2  BRYMAN 1983B obtain upper limits from both direct peak search and analysis of B(${{\mathit \pi}}$ $\rightarrow$ ${{\mathit e}}{{\mathit \nu}})/B({{\mathit \pi}}$ $\rightarrow$ ${{\mathit \mu}}{{\mathit \nu}}$). Latter limits are not listed, except for this entry (i.e. $-$ we list the most stringent limits for given mass).
3  Analysis of (${{\mathit \pi}^{+}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit \nu}_{{{e}}}})/({{\mathit \pi}^{+}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \nu}_{{{\mu}}}}$) and (${{\mathit K}^{+}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit \nu}_{{{e}}}})/({{\mathit K}^{+}}$ $\rightarrow$ ${{\mathit \mu}^{+}}{{\mathit \nu}_{{{\mu}}}}$) decay ratios.
4  Analysis of (${{\mathit K}^{+}}$ $\rightarrow$ ${{\mathit e}^{+}}{{\mathit \nu}_{{{e}}}}$) spectrum.
References