Physics – High Energy Physics – High Energy Physics - Experiment
Scientific paper
2011-10-19
Physics
High Energy Physics
High Energy Physics - Experiment
35 pages, 12 figures
Scientific paper
This paper, together with a subsequent paper, questions the so-called 'LSND anomaly': a 3.8 {\sigma} excess of anti-electronneutrino interactions over standard backgrounds, observed by the LSND Collaboration in a beam dump experiment with 800 MeV protons. That excess has been interpreted as evidence for the anti-muonneutrino{\to} anti-electronneutrino oscillation in the {\Delta}m2 range from 0.2 eV2 to 2 eV2. Such a {\Delta}m2 range is incompatible with the widely accepted model of oscillations between three light neutrino species and would require the existence of at least one light 'sterile' neutrino. In this paper, new data on pion production by protons on nuclei are presented, and four decades old data on pion production by neutrons on nuclei are recalled, that together increase significantly the estimates of standard backgrounds in the LSND experiment, and decrease the significance of the 'LSND anomaly' from 3.8 {\sigma} to 2.9 {\sigma}. In a subsequent paper, in addition the LSND Collaboration's data analysis will be questioned, rendering a further reduction of the significance of the 'LSND anomaly'.
Ammosov Vladimir
Bolshakova The HARP-CDP group: A.
Boyko I.
Chelkov Georgy
Dedovitch D.
No associations
LandOfFree
Revisiting the 'LSND anomaly' I: impact of new data does not yet have a rating. At this time, there are no reviews or comments for this scientific paper.
If you have personal experience with Revisiting the 'LSND anomaly' I: impact of new data, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Revisiting the 'LSND anomaly' I: impact of new data will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-597376