2018/05/31 by Nerling, Frank
#FOS: Physical sciences #High Energy Physics - Experiment (hep-ex)
paper · doi:10.48550/arxiv.1805.12450
The BESIII experiment at BEPCII at IHEP in Beijing/China has collected the world largest data sets in the τ-charm region and it is well suited to cover a rich hadron physics programme, including charmonium and open-charm spectroscopy, R-scan or electromagnetic form factor measurements, and many more. In particular, the unique data sets between 3.8 and 4.6 GeV allow for discoveries and precision measurements of the interesting charmonium-like (exotic) `XYZ' states. The recently published precision cross-section measurement for Y states is discussed as well as the first observation of the X(3872) in radiative decays, also the completion of the two observed isospin triplets Z\rm c(3900) and Z\rm c(4020) is briefly summarised.