Researchers explore why matter is more than antimatter in the Universe

March 29th, 2008 - 12:10 pm ICT by admin  

Canberra, March 29 (ANI): A new research has tried to explain the reason behind the presence of more matter than antimatter in the Universe.

With contributions from physicists at the University of Melbourne, the findings from this research ahs been published in the journal Nature.

According to the research paper, investigation into the process of B-meson decays has given insight into why there is more matter than antimatter in the universe.

B-mesons are a new frontier of investigation for us and have proved very exciting in the formation of new thought in the field of particle physics. said Associate Professor Martin Sevior of the Universitys School of Physics who led the research.

Sevior said that B-mesons contain heavy quarks that can only be created in very high-energy particle accelerators. Their decays provide a powerful means of probing the exotic conditions that occurred in the first fraction of a second after the Big Bang created the Universe.

According to Sevior, Our universe is made up almost completely of matter. While were entirely used to this idea, this does not agree with our ideas of how mass and energy interact. According to these theories, there should not be enough mass to enable the formation of stars and hence life.

In our standard model of particle physics, matter and antimatter are almost identical. Accordingly, as they mix in the early universe, they annihilate one another leaving very little to form stars and galaxies. The model does not come close to explaining the difference between matter and antimatter we see in the nature. The imbalance is a trillion times bigger than the model predicts, he added.

Sevior said that this inconsistency between the model and the universe implies there is a new principle of physics that has not been discovered.

For the research, Sevior, along with his colleagues in the Belle experiment, based at KEK in Japan, produced vast numbers of B mesons with the worlds most intense particle collider.

We then looked at how the B-mesons decay as opposed to how the anti-B-mesons decay. What we find is that there are small differences in these processes, said Sevior.

While most of our measurements confirm predictions of the Standard Model of Particle Physics, this new result appears to be in disagreement, he added.

It is a very exciting discovery because our paper provides a hint as to what the new principle of physics is that led to our Universe being able to support life, said Sevior. (ANI)

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