Physics – High Energy Physics – High Energy Physics - Phenomenology
Scientific paper
2009-03-26
Physics
High Energy Physics
High Energy Physics - Phenomenology
8 pages
Scientific paper
The SHALON Cherenkov telescope has recorded over 2x10^6 extensive air showers during the past 17 years. The analysis of the signal at different zenith angles (\theta) has included observations from the sub-horizontal direction \theta=97^o. This inclination defines an Earth skimming trajectory with 7 km of air and around 1000 km of rock in front of the telescope. During a period of 324 hours of observation, after a cut of shower-like events that may be caused by chaotic sky flashes or reflections on the snow of vertical showers, we have detected 5 air showers of TeV energies. We argue that these events may be caused by the decay of a long-lived penetrating particle entering the atmosphere from the ground and decaying in front of the telescope. We show that this particle can not be a muon or a tau lepton. As a possible explanation, we discuss two scenarios with an unstable neutrino of mass m\approx 0.5 GeV and c\tau\approx 30 m. Remarkably, one of these models has been recently proposed to explain an excess of electron-like neutrino events at MiniBooNE.
Masip Manuel
Nikolsky S. I.
Sinitsyna V. G.
Sinitsyna Yu. V.
No associations
LandOfFree
Heavy neutrino decay at SHALON 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 Heavy neutrino decay at SHALON, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Heavy neutrino decay at SHALON will most certainly appreciate the feedback.
Profile ID: LFWR-SCP-O-65201