Another DM experiment goes bust …

[BeAChooser]

https://phys.org/news/2021-12-amplifier-dark.html

Despite astrophysical evidence for the existence of dark matter, direct detection of its interaction with particles and fields of the standard model has not been achieved. … snip ..

Ultralight axion-like particles (ALP) and dark photons are well-motivated dark matter candidates introduced by theories beyond the standard model of particle physics. … snip …

In a study published in Nature Physics, the research team led by Prof. PENG Xinhua from University of Science and Technology of China (USTC) of the Chinese Academy of Sciences, collaborating with Prof. Dmitry Budker from Helmholtz Institution, first demonstrated a new quantum technique called "spin-based amplifier" that amplified the ALP signal by at least two orders of magnitude.

… snip …

Based on the ultra-sensitive spin-based amplifier, the researchers conducted experimental searches for axion-like particles and dark photons. They found no evidence of the existence of dark matter in the search area, and probed the axion–nucleus coupling down to values below the established astrophysical constraints.

Oh ... too bad.