It was the scientists in the Large Hadron Collider who may have now discovered a new particle, with a different behavior when viewed in its antiparticle. It is the first time that this phenomenon is observed, if these data are confirmed, they can explain why the matter created at the birth of the Universe was not annihilated by the antimatter created simultaneously.
That is, according to the Big Bang Theory, the Universe was born from the expansion of a very hot and dense point almost 14 billion years ago, so the amount of matter created at that time should equal the amount of antimatter. But since matter and antimatter, in contact, annihilate, then, something must have allowed for a part of matter to survive and to give rise to what we are now. Scientists have never understood what interfered with the annihilation between matter and antimatter, but the answer may be in violation of a law of physics called “CP symmetry”.
This law, CP symmetry, is a notion that the behavior of a particle of matter is equal to the behavior of antimatter equivalent antimatter, so, if the whole material world were replaced by the antiparticles corresponding to each thing, the Universe remained Precisely the same.
But there are some exceptions, some particles violate CP symmetry and their antiparticles do not mimic their behavior. It is, for example, the case of a family of subatomic particles called mesons, composed of a quark and an antiquark, such as pons and kons. These particles were studied in 1980 and in 2008 by two scientists who won the Nobel Prize in physics for having discovered that this discrepancy explains in part the survival of more matter than antimatter.
In search of more conclusive answers, LHC scientists between 2011 and 2012 have decided to study baryons, which are a family of subatomic particles composed of three quarks of which neutrons and protons are part. And they discovered that there is a difference between the decay of the baryons and the decay of the antibiotics, which has three antiquarks. As these behave differently, then it means that we are facing a violation of CP symmetry, plus one piece in the mystery of the missing antimatter and the surplus matter. However, further testing is needed to arrive at more enlightening and definitive conclusions.