(C) Other neutrino mixing results

The LSND collaboration reported in AGUILAR 2001 a signal which is consistent with ${{\overline{\mathit \nu}}_{{{\mu}}}}$ $\rightarrow$ ${{\overline{\mathit \nu}}_{{{e}}}}$ oscillations. In a three neutrino framework, this would be a measurement of $\theta _{12}$ and $\Delta \mathit m{}^{2}_{21}$. This does not appear to be consistent with most of the other neutrino data. The following listings include results from ${{\mathit \nu}_{{{\mu}}}}$ $\rightarrow$ ${{\mathit \nu}_{{{e}}}}$, ${{\overline{\mathit \nu}}_{{{\mu}}}}$ $\rightarrow$ ${{\overline{\mathit \nu}}_{{{e}}}}$ appearance and ${{\mathit \nu}_{{{\mu}}}}$, ${{\overline{\mathit \nu}}_{{{\mu}}}}$, ${{\mathit \nu}_{{{e}}}}$, and ${{\overline{\mathit \nu}}_{{{e}}}}$ disappearance experiments, and searches for $\mathit CPT$ violation.

sin$^2(2{}\theta )$ for ``Large'' $\Delta \mathit m{}^{2}$ (${{\mathit \nu}_{{{\mu}}}}$ ( ${{\overline{\mathit \nu}}_{{{\mu}}}}$ ) $\rightarrow$ ${{\mathit \nu}_{{{e}}}}$ ( ${{\overline{\mathit \nu}}_{{{e}}}}$ ))

INSPIRE   JSON  (beta) PDGID:
S067S13
VALUE ($ 10^{-3} $) CL% DOCUMENT ID TECN  COMMENT
$\bf{<1.8}$ 90 1
ROMOSAN
1997
CCFR FNAL
• • We do not use the following data for averages, fits, limits, etc. • •
$<3.8$ 90 2
MCFARLAND
1995
CCFR FNAL
$<3$ 90
BORODOVSKY
1992
CNTR BNL E776
1  ROMOSAN 1997 uses wideband beam with a $0.5~$km decay region.
2  MCFARLAND 1995 state that ``This result is the most stringent to date for 250$<\Delta \mathit m{}^{2}<$450 eV${}^{2}$ and also excludes at 90$\%$CL much of the high $\Delta \mathit m{}^{2}$ region favored by the recent LSND observation.'' See ATHANASSOPOULOS 1995 and ATHANASSOPOULOS 1996.
References