Abstract
We report on the simulation studies addressing the possibility of dark matter particle (DMP) decaying into μ + μ − channel. While not much is known about the properties of dark matter particles except through their gravitational effect, it has been recently conjectured that the so-called ‘anomalous Kolar events’ observed some decades ago may be due to the decay of unstable dark matter particles. The aim of this study is to see if this conjecture can be verified at the proposed iron calorimeter (ICAL) detector at INO. We study the possible decay to μ ± mode which may be seen in this detector with some modifications. For the purposes of simulation, we assume that the channel saturates the decay width for the mass ranging from 1 to 50 GeV/c2. The aim is not only to investigate the decay signatures, but also, more generally, to establish lower bounds on the lifetime of DMP even if no such decay takes place.
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Acknowledgements
The authors would like to thank Prof. M V N Murthy for his critical comments and suggestions. The authors also wish to thank Prof. D Indumathi and Prof. G Rajasekaran for their interest in the work reported in this paper. The authors are also grateful to Prof. Pijushpani Bhattacharjee and Prof. Nita Sinha for their valuable comments and suggestions during the preparation of the manuscript. Thanks are also due to the INO collaborators for their invaluable support.
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DASH, N., DATAR, V.M. & MAJUMDER, G. Sensitivity for detection of decay of dark matter particle using ICAL at INO. Pramana - J Phys 86, 927–937 (2016). https://doi.org/10.1007/s12043-015-1094-5
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DOI: https://doi.org/10.1007/s12043-015-1094-5