Strangely, all three of these neutrino flavors are left-handed (referring to the direction of its spin relative to its motion). There are three known neutrino flavors: the electron-neutrino, muon-neutrino and tau-neutrino. Second, a CPT-respecting universe would add some additional neutrinos to the mix. It's so fuzzy that there is plenty of room for proposals of viable alternatives. While there's a lot of evidence that an event like inflation occurred, the theoretical picture of that event is incredibly fuzzy. The study researchers next asked what the consequences of such a universe would be.įor one, a CPT-respecting universe naturally expands and fills itself with particles, without the need for a long-theorized period of rapid expansion known as inflation. Taken together, the two universes obey CPT symmetry. This cosmos would have all opposite charges than we have, be flipped in the mirror, and run backward in time. To preserve the CPT symmetry throughout the cosmos, there must be a mirror-image cosmos that balances out our own. If we extend the concept of CPT symmetry to our entire cosmos, then our view of the universe can't be the entire picture. This universe is filled with lots of particles doing lots of interesting things, and the evolution of the universe moves forward in time. In other words, this idea extends this symmetry from applying to just the "actors" of the universe (forces and fields) to the "stage" itself, the entire physical object of the universe. But perhaps, if this is such an incredibly important symmetry, it applies to the whole entire universe itself. Usually this symmetry only applies to interactions - the forces and fields that make up the physics of the cosmos. In a new paper (opens in new tab) recently accepted for publication in the journal Annals of Physics, scientists propose extending this combined symmetry. This fundamental symmetry is given a name: CPT symmetry, for charge (C), parity (P) and time (T). If you take every single interaction observed in nature and flip the charges, take the mirror image, and run it backward in time, those interactions behave exactly the same. But physicists have never observed a violation of a combination of all three symmetries at the same time. Physical interactions obey most of these symmetries most of the time, which means that there are sometimes violations.
0 kommentar(er)
