The method of events separation with overlapping signals
https://doi.org/10.29235/1561-2430-2021-57-4-470-478
Abstract
In this paper, we propose a method for the rejection of the background from the superposition of signals from different, almost simultaneously occurring events in the calorimeter for the COMET experiment. The basic idea is to use the chi-squared distribution obtained from fitting the recorded shape of the signal with an average waveform. The elaborated method is applied for the reconstruction of events with overlapping signals from the electron and radiative capture of neutrons by the 175Lu nucleus, as well as overlapping signals from two electrons born as a result of the decay of muons in the bound state with an aluminum nucleus with impulses causing a “false” signal of the μ – e conversion. The method showed a good ability to separate events, meanwhile, the separation time is significantly less than the FWHM of the pulse shape.
About the Authors
D. V. Shoukavy
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus
Belarus
Belarus
Dzmitry V. Shoukavy – Ph. D. (Physics and Mathematics), Leading Researcher
68-2, Nezavisimosti Ave., 220072, Minsk
D. N. Grigoriev
Budker Institute of Nuclear Physics of Siberian Branch Russian Academy of Sciences; Novosibirsk State Technical University; Novosibirsk State University
Russian Federation
Russian Federation
Dmitry N. Grigoriev – Ph. D. (Physics and Mathematics), Head of the Laboratory;Head of the Laboratory; Associate Professor
2, Pirogova Str., 630090, Novosibirsk; 11, akademika Lavrentieva Ave., 630090, Novosibirsk; 20, K. Marksa Ave., 630073, Novosibirsk
D. S. Vasileuskaya
B. I. Stepanov Institute of Physics of the National Academy of Sciences of Belarus
Belarus
Belarus
Darya. S. Vasileuskaya – Junior Researcher
68-2, Nezavisimosti Ave., 220072, Minsk
References
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