NEMESIS Setup for Indirect Detection of WIMPs
Trzaska, W. H., Barzilov, A., Enqvist, T., Jedrzejczak, K., Joutsenvaara, J., Kasztelan, M., Kotavaara, O., Kuusiniemi, P., Loo, K.K., Orzechowski, J., Puputti, J., Slupecki, M., Szabelski, J., Usoskin, I., & Ward, E. (2022). NEMESIS Setup for Indirect Detection of WIMPs. Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, 1040, Article 167223. https://doi.org/10.1016/j.nima.2022.167223
Julkaistu sarjassa
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated EquipmentTekijät
Päivämäärä
2022Tekijänoikeudet
© 2022 The Author(s). Published by Elsevier B.V.
We summarize the evidence for DM-like anomalies in neutron multiplicity spectra collected underground with Pb targets by three independent experiments: NEMESIS (at 210 m.w.e.) NMDS (at 583 m.w.e.), and ZEPLIN-II (at 2850 m.w.e.). A new analysis shows small but persistent anomalies at high neutron multiplicities. Adjusted for differences in detection efficiencies, the positions of the anomalies are consistent between the three systems. Also, the intensities match when corrected for the acquisition time and estimated detection efficiency. While the three measurements are inconclusive when analyzed separately, together, they exclude a statistical fluke to better than one in a million. To prove the existence of the anomalies above the 5-sigma discovery threshold, we propose to upgrade the current NEMESIS setup. The upgrade concept and the critical components of the new experiment are described. The upgraded setup would already acquire the needed data sample during the first year of operation. Additional information, vital for the physics interpretation of the analysis, will be obtained with a Cu target.
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Elsevier BVISSN Hae Julkaisufoorumista
0168-9002Asiasanat
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https://converis.jyu.fi/converis/portal/detail/Publication/150950488
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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). Assistance from A. Sobkow from the Lodz University of Technology is gratefully acknowledged.Lisenssi
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