October 23, 2021

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‘Doubly charming’ tetraquark is the longest-lived exotic-matter particle ever found

5 min read

Scientists at the world’s largest atom smasher have discovered the longest-lived exotic-matter particle ever observed, and it has twice the charm of anything discovered to date.

Physicists have yet to delve into the enigmatic nature of this newfound particle — called a double-charm tetraquark — but it’s a truly weird mix, containing an unusual combination of two matter particles and two antimatter particles. And the doubly charming particle is so weird that we don’t even know how its parts stick together.

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