(A) Neutrino fluxes and event ratios

Events (observed/expected) from accelerator ${{\mathit \nu}_{{{\mu}}}}$ experiments.

INSPIRE   PDGID:
S067AER
Some neutrino oscillation experiments compare the flux in two or more detectors. This is usually quoted as the ratio of the event rate in the far detector to the expected rate based on an extrapolation from the near detector in the absence of oscillations.

VALUE DOCUMENT ID TECN  COMMENT
• • We do not use the following data for averages, fits, limits, etc. • •
$1.01$ $\pm0.10$ 1
ABE
2014B
 T2K ${{\mathit \nu}_{{{e}}}}$ rate in T2K near detect.
$0.71$ $\pm0.08$ 2
AHN
2006A
 K2K K2K to Super-K
$0.64$ $\pm0.05$ 3
MICHAEL
2006
MINS All charged current events
$0.71$ ${}^{+0.08}_{-0.09}$ 4
ALIU
2005
K2K KEK to Super-K
$0.70$ ${}^{+0.10}_{-0.11}$ 5
AHN
2003
K2K KEK to Super-K
1  The rate of ${{\mathit \nu}_{{{e}}}}$ from ${{\mathit \mu}}$ decay was measured to be $0.68$ $\pm0.30$ compared to the predicted flux. From ${{\mathit K}}$ decay $1.10$ $\pm0.14$ compared to the predicted flux.
2  Based on the observation of 112 events when $158.1$ ${}^{+9.2}_{-8.6}$ were expected without oscillations. Including not only the number of events but also the shape of the energy distribution, the evidence for oscillation is at the level of about 4.3 $\sigma $. Supersedes ALIU 2005.
3  This ratio is based on the observation of 215 events compared to an expectation of $336$ $\pm14$ without oscillations. See also ADAMSON 2008.
4  This ratio is based on the observation of 107 events at the far detector 250 km away from KEK, and an expectation of $151$ ${}^{+12}_{-10}$.
5  This ratio is based on the observation of 56 events with an expectation of $80.1$ ${}^{+6.2}_{-5.4}$.
References