| Autor: |
Karol Jedrzejczak, Ilya Usoskin, Julia Puputti, Jerzy Orzechowski, Anita Sobkow, Kai Loo, Marcin Kasztelan, Wladyslaw Henryk Trzaska, Jari Joutsenvaara, Maciej Slupecki, Thomas Ward, Pasi Kuusiniemi, Jacek Szabelski, Timo Enqvist, Ossi Kotavaara |
| Přispěvatelé: |
Helsinki Institute of Physics |
| Rok vydání: |
2021 |
| Předmět: |
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| Zdroj: |
Proceedings of 37th International Cosmic Ray Conference — PoS(ICRC2021). |
| DOI: |
10.22323/1.395.0514 |
| Popis: |
Funding Information: This work has been supported in part by the EU INTERREG for the Baltic Sea programme within the BSUIN project, and by the Polish Ministry of Science and Higher Education (Grant no. Funding Information: This work has been supported in part by the EU INTERREG for the Baltic Sea programme within the BSUIN project, and by the Polish Ministry of Science and Higher Education (Grant no. 3988/INTERREG BSR/2018/2). Publisher Copyright: © Copyright owned by the author(s) under the terms of the Creative Commons. Preliminary results from a 349-day run (live time) with a 565 kg Pb target and a 166-day background measurement are presented. Three minor anomalies were detected in muon-suppressed neutron multiplicity spectra. The multiplicities of these small excesses match the outcome of an earlier, similar but independent measurement. The nature of the anomalies remains unclear, but, in principle, they may be a signature of self-annihilation of a Weakly Interacting Massive Particle (WIMP) with a mass around 10 GeV/c2. If our interpretation is correct, the expected cross section would be of the order of 10-42 cm2 for Spin Dependent and 10-46 cm2 for Spin Independent interactions. Analysis of the event rate, based on the statistical uncertainty, indicates that cross-section limits for Dark Matter (DM) mass range of approximately 3-40 GeV/c2 can be investigated with an upgraded NEMESIS setup. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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