Particle seen switching between matter and antimatter at CERN

A subatomic particle has been found to switch between matter and antimatter, according to Oxford physicists analyzing data from the Large Hadron Collider. Antimatter is kind of the "Evil twin" of normal matter, but it's surprisingly similar - in fact, the only real difference is that antimatter has the opposite charge. Others have even been seen to exist as a weird mixture of both states at the same time, thanks to the quantum quirk of superposition That means that these particles actually oscillate between being matter and antimatter. Now, a new particle has joined that exclusive club - the charm meson. This subatomic particle is normally made up of a charm quark and an up antiquark, while its antimatter equivalent consists of a charm antiquark and an up quark. According to the Standard Model of particle physics, the Big Bang should have produced matter and antimatter in equal amounts, and over time that all would have collided and annihilated, leaving the cosmos a very empty place. One hypothesis that the new discovery raises is that particles like the charm meson will transition from antimatter to matter more often than they turn from matter to antimatter.