What is a glueball? Chinese-led team finds rare particle made entirely of force

In a historic breakthrough, a Chinese-led international team of scientists has confirmed the existence of the glueball – a rare form of matter made entirely of force. The finding was announced by a Chinese research team on Thursday at the International Conference on High Energy Physics in Natal, Brazil. Held every two years, the event features some of the most significant advancements in the field. After 15 years of research, the team finally gathered definitive evidence of glueballs using the...