Physicists with the BESIII Collaboration have observed an anomalous line shape around ppbar mass threshold in the J/ψ→γ3(π+π-) decay, which indicates...
The neutron is a bound system of three valence quarks and a neutral sea consisting of gluons and quark-antiquark pairs. Although the proton was discovered...
Physicists from the Beijing Spectrometer (BESIII) Collaboration at the Beijing Electron Positron Collider in China have detected the first candidate for...
