pdgLive

(C) Other neutrino mixing results

The LSND collaboration reported in AGUILAR 2001 a signal which is consistent with

{\overset{―}{ν}}_{μ}

\to

{\overset{―}{ν}}_{e}

oscillations. In a three neutrino framework, this would be a measurement of

θ_{12}

and

Δ m_{21}^{2}

. This does not appear to be consistent with most of the other neutrino data. The following listings include results from

ν_{μ}

\to

ν_{e}

,

{\overset{―}{ν}}_{μ}

\to

{\overset{―}{ν}}_{e}

appearance and

ν_{μ}

,

{\overset{―}{ν}}_{μ}

,

ν_{e}

, and

{\overset{―}{ν}}_{e}

disappearance experiments, and searches for

C P T

violation.

sin $^{2} (2 θ)$ for ``Large'' $Δ m^{2}$ ( ${\overset{―}{ν}}_{μ}$ $\to$ ${\overset{―}{ν}}_{e}$ )

VALUE (

10^{- 3}

)

CL%

DOCUMENT ID

TECN

COMMENT

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

< 6.4 \times 10^{2}

90

ICAR

{\overset{―}{ν}}_{e}

appearance

< 150

90

MBNE

MiniBooNE/SciBooNE

0.4 - 9.0

99

AGUILAR-AREVA..

MBNE

E

_{ν} >

475 MeV

0.4 - 9.0

99

AGUILAR-AREVA..

MBNE

E

_{ν} >

200 MeV

< 3.3

90

AGUILAR-AREVA..

MBNE

MiniBooNE

< 1.7

90

KAR2

Liquid Sci. calor.

< 1.1

90

NTEV

NUTEV FNAL

5.3

\pm 1.3

\pm 9.0

LSND

LAMPF

6.2

\pm 2.4

\pm 1.0

ATHANASSOPOUL..

LSND

LAMPF

3 - 12

80

ATHANASSOPOUL..

< 6

90

¹	ANTONELLO 2013A obtained the limit by assuming ${\overset{―}{ν}}_{μ}$ $\to$ ${\overset{―}{ν}}_{e}$ oscillation from the $\sim 2 %$ of ${\overset{―}{ν}}_{μ}$ evnets contamination in the CNGS beam.

²	CHENG 2012 is a combined fit of MiniBooNE and SciBooNE antineutrino data.

³

This value is for a two neutrino oscillation analysis for excess antineutrino events with E

_{ν} >

475 MeV. At 90

%

CL there is no solution at high

Δ m^{2}

. The best fit is at maximal mixing. The allowed region is consistent with LSND reported by AGUILAR 2001. Supercedes AGUILAR-AREVALO 2009B.

⁴

This value is for a two neutrino oscillation analysis for excess antineutrino events with E

_{ν} >

200 MeV with subtraction of the expected 12 events low energy excess seen in the neutrino component of the beam. At 90

%

CL there is no solution at high

Δ m^{2}

. The best fit value is 0.007 for

Δ m^{2}

= 4.4 eV

^{2}

.

⁵	This result is inconclusive with respect to small amplitude mixing suggested by LSND.

⁶	ARMBRUSTER 2002 is the final analysis of the KARMEN2 data. See footnote in the preceding table for further details, and the paper for the exclusion plot.

⁷

AGUILAR 2001 is the final analysis of the LSND full data set. The deduced oscillation probability is

0.264

\pm 0.067

\pm 0.045 %

; the value of sin

^{2} 2 θ

for large

Δ m^{2}

is twice this probability (although these values are excluded by other constraints). See footnote in preceding table for further details, and the paper for a plot showing allowed regions. Supersedes ATHANASSOPOULOS 1995, ATHANASSOPOULOS 1996, and ATHANASSOPOULOS 1998.

⁸	ATHANASSOPOULOS 1996 reports ( $0.31$ $\pm 0.12$ $\pm 0.05) %$ for the oscillation probability; the value of sin $^{2} 2 θ$ for large $Δ m^{2}$ should be twice this probability. See footnote in preceding table for further details, and see the paper for a plot showing allowed regions.

⁹	ATHANASSOPOULOS 1995 error corresponds to the $1.6 σ$ band in the plot. The expected background is $2.7$ $\pm 0.4$ events. Corresponds to an oscillation probability of ( $0.34$ $_{- 0.18}^{+ 0.20}$ $\pm 0.07) %$ . For a different interpretation, see HILL 1995. Replaced by ATHANASSOPOULOS 1996.

¹⁰

HILL 1995 is a report by one member of the LSND Collaboration, reporting a different conclusion from the analysis of the data of this experiment (see ATHANASSOPOULOS 1995). Contrary to the rest of the LSND Collaboration, Hill finds no evidence for the neutrino oscillation

{\overset{―}{ν}}_{μ}

\to

{\overset{―}{ν}}_{e}

and obtains only upper limits.

EPJ C73 2599

Search for Anomalies in the

ν_{e}

Appearance from a

ν_{μ}

Beam

PR D86 052009

Dual Baseline Search for Muon Antineutrino Disappearance at 0.1 eV

^{2}

<

Δ

m

^{2}

<

100 eV

^{2}

AGUILAR-AREVALO

PRL 105 181801

Event Excess in the MiniBooNE Search for

{\overset{―}{ν}}_{μ} \leftrightarrow {\overset{―}{ν}}_{e}

Oscillations

AGUILAR-AREVALO

PRL 103 111801

A Search for Electron Antineutrino Appearance at the

Δ m^{2}

\sim

1

eV

^{2}

Scale

PR D65 112001

Upper Limits for Neutrino Oscillations

{\overset{―}{ν}}_{μ} - {\overset{―}{ν}}_{e}

from Muon Decay at Rest

PRL 89 011804

A Search for

ν_{μ} - ν_{e}

and

{\overset{―}{ν}}_{μ} - {\overset{―}{ν}}_{e}

Oscillations at NUTeV

PR D64 112007

Evidence for Neutrino Oscillations from the Observation of

{\overset{―}{ν}}_{e}

Appearance in a

{\overset{―}{ν}}_{μ}

Beam

ATHANASSOPOULOS

PR C54 2685

Evidence for Neutrino Oscillations from Muon Decay at Rest

ATHANASSOPOULOS

PRL 75 2650

Candidate Events in a Search for

{\overset{―}{ν}}_{μ}

\leftrightarrow

{\overset{―}{ν}}_{e}

Oscillations

PRL 75 2654

Alternative Analysis of the LSND Neutrino Oscillation Search Data on

{\overset{―}{ν}}_{μ}

\leftrightarrow

{\overset{―}{ν}}_{e}

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