New NEMESIS Results

Abstract
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 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. The expected cross section would be around 10E-42 cm2 for Spin Dependent and 10E-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.
Main Authors
Format
Conferences Conference paper
Published
2021
Series
Subjects
Publication in research information system
Publisher
Sissa
The permanent address of the publication
https://urn.fi/URN:NBN:fi:jyu-202202091470Käytä tätä linkitykseen.
Review status
Non-peer reviewed
ISSN
1824-8039
DOI
https://doi.org/10.22323/1.395.0514
Conference
International Cosmic Ray Conference
Language
English
Published in
POS Proceedings of Science
Is part of publication
ICRC2021 : 37th International Cosmic Ray Conference
Citation
  • Trzaska, W. H., Enqvist, T., Jędrzejczak, K., Joutsenvaara, J., Kasztelan, M., Kotavaara, O., Kuusiniemi, P., Loo, K., Orzechowski, J., Puputti, J., Sobkow, A., Słupecki, M., Szabelski, J., Usoskin, I., & Ward, T. (2021). New NEMESIS Results. In ICRC2021 : 37th International Cosmic Ray Conference (Article 514). Sissa. POS Proceedings of Science, 395. https://doi.org/10.22323/1.395.0514
License
CC BY-NC-ND 4.0Open Access
Additional information about funding
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).
Copyright© Copyright owned by the authors

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