The LSND Collaboration reported a 3.8 σ excess of ν¯e over background, in an experiment that dumped 800 MeV protons into a water target. They interpreted this excess as evidence for ν¯µ → ν¯e oscillations, which led to the suggestion of 'sterile' neutrinos. LSND's claim was not confirmed by the MiniBooNE Collaboration, yet the origins of the LSND result were never clarified. The data from the HARP-CDP group on pion production by 800 MeV protons are used in an independent calculation of LSND's ν¯e background, also taking into account pion production by neutrons which had been ignored in LSND's calculations. We conclude that LSND's claim of a 3.8 σ excess cannot be upheld.
Is there any “LSND anomaly”?
De Min A.;
2010-01-01
Abstract
The LSND Collaboration reported a 3.8 σ excess of ν¯e over background, in an experiment that dumped 800 MeV protons into a water target. They interpreted this excess as evidence for ν¯µ → ν¯e oscillations, which led to the suggestion of 'sterile' neutrinos. LSND's claim was not confirmed by the MiniBooNE Collaboration, yet the origins of the LSND result were never clarified. The data from the HARP-CDP group on pion production by 800 MeV protons are used in an independent calculation of LSND's ν¯e background, also taking into account pion production by neutrons which had been ignored in LSND's calculations. We conclude that LSND's claim of a 3.8 σ excess cannot be upheld.I documenti in IRIS sono protetti da copyright e tutti i diritti sono riservati, salvo diversa indicazione.
