[ExI] Major Antimatter Discovery May Help Solve Mystery of Existence

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Breaking: Major Antimatter Discovery May Help Solve Mystery of Existence
17 July 2025   By Michael Irving

<https://www.sciencealert.com/breaking-major-antimatter-discovery-may-help-solve-mystery-of-existence>
Quote:
In theory, the Big Bang shouldn't have favored one over the other,
creating both matter and antimatter in equal amounts. And if that was
the case, the entire contents of the Universe should have blasted
itself into oblivion in the first few moments of existence, leaving
the cosmos a profoundly empty place.

Since that obviously didn't happen, it seems some unknown factor
intervened so that slightly more matter was created than antimatter.
Everything that exists today – from galaxies to grains of sand – are
made of that tiny fraction that survived early annihilation.

Known as a charge-parity (CP) violation, the effect has only
previously been detected in another class of particles, called mesons.
But experimental evidence in baryons, which make up the bulk of the
Universe's matter, is something physicists have been long hunting for.

"It shows that the subtle differences between matter and antimatter
exist in a wider range of particles, indicating that the fundamental
laws of physics treat baryons and antibaryons differently," Xueting
Yang, CERN physicist and first author of the study, told ScienceAlert.
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