Analysis of rare signals at the Baksan underground scintillation telescope

Abstract

Using the large sample of the experimental data (1985–1991 years) which were detected by Baksan underground scintillation telescope in the search for collapse neutrinos an analysis was performed to study rare signals consisting of two single events within one-second interval. Trajectories drawn via these single events show apparently an excess in the direction towards the Sun. Random probability of the effect is ∼ 6.4 σ. Some of the difficulties in the effect explanation are discussed.