Physicists Observe Matter-Antimatter Asymmetry in Charm Particle Decays

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Physicists from the Large Hadron Collider beauty (LHCb) Collaboration at CERN have observed, for the first time, the matter-antimatter asymmetry known as charge-parity (CP) violation in the decays of a D0 meson, a subatomic particle made up of a charm quark and an up antiquark.

The LHCb magnet. Image credit: CERN.

The term CP refers to the transformation that swaps a particle with the mirror image of its antiparticle.

The weak interactions of the Standard Model of particle physics are known to induce a difference in the behavior of some particles and of their CP counterparts, an asymmetry known as CP violation.

This asymmetry is one of the key ingredients required to explain why today’s Universe is only composed of matter particles, with essentially no residual presence of antimatter.


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This article and images were originally posted on [Breaking Science News]. Credit to the original author and Breaking Science News | ESIST.T>G>S Recommended Articles Of The Day

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