First WIMP Search Results from the XENONnT

2023-03-23

Scientists from the international XENON collaboration, an international experimental group including Prof. Yoshitaka Itow, Dr. Masatoshi Kobayashi, Division for Cosmic Ray Research, ISEE, and Prof. Shingo Kazama, Kobayashi-Maskawa Institute for the Origin of Particles and the Universe (KMI), Nagoya University; the Institute for Space-Earth Environmental Research (ISEE), Nagoya University; the Kavli Institute for the Physics and Mathematics of the Universe (Kavli IPMU), The University of Tokyo; the Institute for Cosmic Ray Research (ICRR), The University of Tokyo; and the Graduate School of Science, Kobe University, announced today the first WIMP dark matter search results from XENONnT, the latest detector of the XENON Dark Matter program. The XENON collaboration reported that new limits on interaction of WIMPs with ordinary matter, which is significantly improved the previous limits reported by the predecessor experiment, the XENON1T, in 2018. This result was presented at the special colloquium at Special Issue of L’Aqiula Joint Astroparticle Collloquia, on 22:30 2023/3/22 Japan Standard Time.

For more detail, please visit press release by XENON Collaboration:
https://xenonexperiment.org/
Press release by KMI (in Japanese)
https://www.kmi.nagoya-u.ac.jp/eng/blog/2023/03/23/2757

The XENON collaboration is an international experimental group including Nagoya University, the University of Tokyo, and Kobe University from Japan.
Japanese groups are contributing for the gadolinium loaded water cerenkov based neutron veto system initially developed by Super-Kamiokande group; the liquid xenon purification system with the experience from the XMASS experiment; and data analysis as one of analysis coordinators.
*Our research related to XENON1T and XENONnT experiments are supported by: JSPS Kakenhi (18H03697, 18KK0082, 19H05802, 19H05805, 19H00675, 19H01920, 21H05455, 21H04466, 22H00127) , JSPS Core-to-Core program (JPJSCCA20200002), and JST FOREST JPMJFR212Q.

Paper details
Title: First Dark Matter Search with Nuclear Recoils from the XENONnT Experiment
Author: XENON Collaboration
Preprint: xenonexperiment.org

(Submitted to Physical Review Letters, will appear in arxiv.org shortly)