Daily briefing: New evidence of the mysterious ‘glueballs’

TL;DR - Nature’s daily briefing highlights new evidence for elusive “glueballs,” particles composed entirely of force-carrying gluons. If confirmed, they would provide an important test of theories describing the strong nuclear force.

• Physicists report evidence of a particle made solely from gluons.
• The briefing does not provide experimental methods, confidence levels, or confirmation status.
• It also covers changes to US childhood-vaccine recommendations and efforts to improve chocolate.