A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
NEMESIS Setup for Indirect Detection of WIMPs (2022)
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
JYU-tekijät tai -toimittajat
Julkaisun tiedot
Julkaisun kaikki tekijät tai toimittajat: Trzaska, Wladyslaw H.; Barzilov, A.; Enqvist, T.; Jedrzejczak, K.; Joutsenvaara, J.; Kasztelan, M.; Kotavaara, O.; Kuusiniemi, P.; Loo, K.K.; Orzechowski, J.; et al.
Lehti tai sarja: Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment
ISSN: 0168-9002
eISSN: 1872-9576
Julkaisuvuosi: 2022
Volyymi: 1040
Artikkelinumero: 167223
Kustantaja: Elsevier BV
Julkaisumaa: Alankomaat
Julkaisun kieli: englanti
DOI: https://doi.org/10.1016/j.nima.2022.167223
Julkaisun avoin saatavuus: Avoimesti saatavilla
Julkaisukanavan avoin saatavuus: Osittain avoin julkaisukanava
Julkaisu on rinnakkaistallennettu (JYX): https://jyx.jyu.fi/handle/123456789/82567
Tiivistelmä
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.
YSO-asiasanat: hiukkasfysiikka; pimeä aine; neutronit
Vapaat asiasanat: dark matter; WIMP; indirect detection; neutron detectors
Liittyvät organisaatiot
OKM-raportointi: Kyllä
Raportointivuosi: 2022
JUFO-taso: 1
