A critical appraisal of the LSND anomaly

Details A critical appraisal of the LSND anomaly A critical appraisal of the LSND anomaly

2008-10-08

arxiv.org/abs/0810.1398v1

Physics

High Energy Physics

High Energy Physics - Experiment

Proceedings of the 34th International Conference on High Energy Physics

Scientific paper

The so-called 'LSND anomaly', a 3.8 sigma excess of anti-nu_e events interpreted as originating from anti-nu_mu -> anti-nu_e oscillation, gave rise to many theoretical speculations. The MiniBooNE Collaboration reported inconsistency of this interpretation with the findings from their search for nu_mu -> nu_e oscillations. Yet the origin of the LSND anomaly was never clarified. A critical issue is the prediction of the background anti-nu_e flux that was used in the analysis of the LSND experiment. For this, decisive input comes from pion spectra measured with the HARP large-angle spectrometer under conditions that closely resemble the LSND situation: a proton beam with 800 MeV kinetic energy hitting a water target.

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