CERN Finds Evidence of a One-in-10-Billion Decay

CERN scientists have found evidence of a particle decay predicted to occur just once in every 10 billion cases, using the Large Hadron Collider to study particles produced in proton collisions. The result offers a glimpse of what researchers call the “zeptoverse,” an unexplored scale of the subatomic world. It points to an extraordinarily rare process, not the discovery of new fundamental particles.

A rare process in the collisions

The Large Hadron Collider smashes protons together to produce particles for scientists to study. Researchers focused on beauty particles, short-lived particles created in these collisions. They found evidence that one can transform into other particles through an extremely rare process.

The predicted frequency gives the finding its striking scale: once in every 10 billion cases. That figure describes how rarely the process is expected to occur; it doesn't mean researchers observed a new particle appearing once in every 10 billion collisions. The account identifies evidence of the decay process, but doesn't give further details about the number of events analyzed or how researchers measured the evidence.

Beauty particles are the focus because collisions at the collider create them, and they don't last long. Scientists study the particles produced when they transform. Here, researchers found evidence of a transformation whose predicted rarity offers an unusual route into the subatomic world. The report describes the process; it doesn't claim that the wider search for new fundamental particles has been settled.

What the zeptoverse might reveal

Scientists use “zeptoverse” to describe this incredibly small scale, an unexplored frontier of the subatomic world. Researchers hope exploring it could lead to the discovery of new fundamental particles. That remains a goal, not a result announced in this finding.

The rare decay matters because scientists believe investigating this frontier could also help answer major questions in physics. What are dark matter and dark energy? Together, those two phenomena account for around 95% of the universe, according to the article. The evidence reported at CERN doesn't explain either one; the proposed connection is that further exploration could help address those unanswered questions.

The distinction matters. Researchers have found evidence for a process expected to occur at an extraordinarily low rate. They see the zeptoverse as a place where future work may uncover particles and offer clues about dark matter and dark energy. The report doesn't claim those ambitions have already been achieved. For now, the finding is evidence of a rare decay involving particles produced by the Large Hadron Collider, and another reason scientists are examining this little-explored subatomic scale.