Experimental particle physics

The hunt for new particles helps to complete our understanding of hadronic matter. The LHCb Collaboration now reports the surprising observation of a doubly charmed tetraquark.

Two recent studies report more stringent constraints on dark matter from experiments with atoms and ions that make use of techniques and devices developed for quantum technologies.

Quantum machine learning may provide powerful tools for data analysis in high-energy physics. Sau Lan Wu and Shinjae Yoo describe how the potential of these tools is starting to be tested and what has been understood thus far.

Although the mass of the electron antineutrino is still eluding direct measurement, the KATRIN experiment with its huge spectrometer has pushed the sensitivity below a billionth of the proton mass.

Two recent studies look for magnetic monopoles in very different, and rather exotic, places: in heavy ion collisions at the Large Hadron Collider and the IceCube neutrino detector in Antarctica.