In physics sometimes verifying the obvious is more difficult than proving the difficult. The obvious, in this case, is why the universe is made of “Matter”. From your loud neighbor to the outermost galaxy everything is made of matter, but the laws of physics are balanced so there should be just as much antimatter. So why is not there?
We have not got a full image yet, but an international team of scientists might have discovered very significant evidence. They discovered that some atomic nuclei are not symmetric, but are in fact pear-shaped.
The shape of 224RA assumed from the CERN measurements, ISOLDE/CERN
In a paper printed in Physical Review Letters, scientists experimented that the isotope Barium-144 is not sphere shaped or oval shaped. In this short-lived atom, protons and neutrons end up scattered in an irregular shape, with more mass at one end of the nucleus than another. This discovery is in conflict with some nuclear theories, and it could even prove that time travel is unmanageable or even impossible. The pear-shaped scattering of particles break up the so-called CP-symmetry (CP stands for charge and parity). In C-symmetry, if you change every particle for its anti-particle, they are expected to act in the same way. Anti-hydrogen will act like hydrogen, for instance. The P-symmetry is about space: A system can be reversed, like in a mirror, and the physics should still be unchanged. CP-symmetry recommends that for every particle rotating anti-clockwise and decaying in a certain direction, there is an anti-particle rotating clockwise and decaying in the different direction. Violation of C and CP symmetry are suggested and expected to clarify the absence of anti-matter in the universe, but so far only a one or two examples have been discovered.
This is the 2nd atom discovered with an asymmetric-shape and is another signal that there is more physics beyond what is now expected by the Standard Model of particle physics. As far as we know, the whole universe is symmetric under
CPT (charge, parity, and time), which adds a time reversal situation. This indicates that if CP is violated, then also the T symmetry essentially be violated so things do not occur forward and backward in time. This is another example of a noticeable thing at our level (cracked eggs do not jump back together) but not in ultimate physics. This discovery strongly specifies that time is actually broken and it has a definite direction. Co-author Dr Marcus Scheck told the BBC, "We have found these nuclei exactly point towards a direction in space. This relates to a direction in time, proving there is a well-defined direction in time and we will permanently travel from past to present".
The research will now be repeated at CERN at its Isotope Separator On Line Detector (ISOLDE) facility in Switzerland, which can create Barium-144 in huge amounts, in the hope of glimpsing what anticipates us further than the horizon of current physics.