Searches for Light Dark Matter and Evidence of Coherent Elastic Neutrino-Nucleus Scattering of Solar Neutrinos with the LUX-ZEPLIN (LZ) Experiment We present searches for light dark matter (DM) with masses 3-9 GeV/$c^2$ in the presence of coherent elastic neutrino-nucleus scattering (CE$ν$NS) from $^{8}$B solar neutrinos with the LUX-ZEPLIN experiment. This analysis uses a 5.7 tonne-year exposure with data collected between March 2023 and April 2025. In an energy range spanning 1-6 keV, we report no significant excess of events attributable to dark matter nuclear recoils, but we observe a significant signal from $^{8}$B CE$ν$NS interactions that is consistent with expectation. We set world-leading limits on spin-independent and spin-dependent-neutron DM-nucleon interactions for masses down to 5 GeV/$c^2$. In the no-dark-matter scenario, we observe a signal consistent with $^{8}$B CE$ν$NS events, corresponding to a $4.5σ$ statistical significance. This is the most significant evidence of $^{8}$B CE$ν$NS interactions and is enabled by robust background modeling and mitigation techniques. This demonstrates LZ's ability to detect rare signals at keV-scale energies.

The paper from the #LUXZEPLIN collaboration on their low-mass dark matter search and their observation of boron-8 solar neutrino scattering is available on the arXiv pre-print server:

https://arxiv.org/abs/2512.08065

LZ experiment sets new record in the hunt for dark matter, glimpses neutrinos from the sun’s core With contributions from Brown faculty and students, the LUX-ZEPLIN experiment analyzed the largest dataset ever collected by a dark matter detector, and the results provide the strongest constraints yet on low-mass WIMPs.

A press release from Brown University gives more information about the experiment and what was presented today:

https://www.brown.edu/news/2025-12-08/lz-dark-matter

A paper is forthcoming.

#LUXZEPLIN #darkmatter #LZ #neutrino

A large cylinder, more than 2 persons high, contains the 7 tonnes of liquid xenon used by the LUX-ZEPLIN (LZ) dark matter search experiment.

Very much enjoyed today’s seminar from the #LUXZEPLIN (#LZ) collaboration. With 417 live-days of data, they have expanded their analysis window to low-mass dark matter candidates. No evidence of candidates in their narrow search window (3-9 GeV, or […]

[Original post on mastodon.cooleysekula.net]

✨ Σκοτεινή ύλη: το μεγαλύτερο μυστήριο της φυσικής.
Το LUX-ZEPLIN ανακοίνωσε τα πιο ακριβή αποτελέσματα μέχρι σήμερα, περιορίζοντας τις πιθανότητες για WIMPs.
👉 Όλο το άρθρο εδώ: www.techgear.gr/sto-katofli-...
#DarkMatter #Science #LUXZEPLIN