Evidence for neutrino oscillations from muon decay at rest
May, 199657 pages
Published in:
- Phys.Rev.C 54 (1996) 2685-2708
e-Print:
- nucl-ex/9605001 [nucl-ex]
PDG: for sin = 1 ( )
Report number:
- LA-UR-96-1326
Experiments:
Citations per year
Abstract:
A search for nu_bar_mu to nu_bar_e oscillations has been conducted at the Los Alamos Meson Physics Facility using nu_bar_mu from mu+ decay at rest. The nu_bar_e are detected via the reaction (nu_bar_e,p) -> (e+,n), correlated with the 2.2 MeV gamma from (n,p) -> (d,gamma). The use of tight cuts to identify e+ events with correlated gamma rays yields 22 events with e+ energy between 36 and 60 MeV and only 4.6 (+/- 0.6) background events. The probability that this excess is due entirely to a statistical fluctuation is 4.1E-08. A chi~2 fit to the entire e+ sample results in a total excess of 51.8 (+18.7) (-16.9) (+/- 8.0) events with e+ energy between 20 and 60 MeV. If attributed to nu_bar_mu -> nu_bar_e oscillations, this corresponds to an oscillation probability (averaged over the experimental energy and spatial acceptance) of 0.0031 (+0.0011) (-0.0010) (+/- 0.0005).Note:
- 57 pages, 34 figures, documentstyle[preprint,aps]{revtex}, additional information available at http://nu1.lampf.lanl.gov/lsnd/ Report-no: LA-UR-96-1326
- muon+: leptonic decay
- leptonic decay: muon+
- at rest
- neutrino: oscillation
- antineutrino/mu
- antineutrino/e
- antineutrino p: interaction
- interaction: antineutrino p
- charged current
- p n: radiative capture
References(40)
Figures(0)