Saturday, September 10, 2005

Why does the universe exist?

I am posing my own question here to see what people think about the subject. In all physical laws there's an idea of symmetry. A simple example is Newton's well known law "every action has an equal and opposite reaction". The same thing goes for particles when they pop into existence. There is a normal particle and an antimatter equivalent. These particles are exact opposites of each other in almost every possible way and when they collide they completely annihilate each other. Now the conundrum: why is it that antimatter is so rare in our universe? At the creation of the universe matter and antimatter were created in equal quantities to have a net result of zero. Where did all the antimatter go? It couldn't have collided with matter since normal matter is still around in such massive quantities.
The best explanation physicists have come up with are small quantum fluctuations that cause antimatter to decay slightly more quickly than normal matter but these models can't account for the huge difference in the amounts of each present in the universe. If it weren't for this discrepancy we wouldn't exist today. So why exactly is it that the universe exists at all?


Blogger Hawaii said...

I had the understanding that scientists currently assume that slightly more matter than anti-matter was originally created at the beginning of the universe. They haven't actually explained this, but it is the current model (I think). It was a very tiny extra matter atom for every billion matter/anti-matter pairs (this is off of a strange website...but it's a number). for the info. It's on there somewhere.

1:42 PM  
Blogger frankd23 said...

God...haha. The problem with being religious and "a man of science" so to speak is that there is always that clash. I guess my response to this question would have to be God decided to do whatever he did. Anyone else have problems like mine?

1:26 PM  
Blogger stet200 said...

I have to agree with the idea that hawaii brought up, because it is one of the most plausible ideas that are presented. That more matter exist than antimatter. That would be the only way that matter could exist today for the reason that, as the original post says, if there were equal amount of mattter as antimatter they would cancel each other out. As respects to the argument that that there is extra antimatter that exist, i dont think that is very plausible. I think anti matter was sort of a limiting "reactant" and when it was used up the matter that we see today is what was left. If there was antimatter left over today we would have to notice some distinct changes in the universe that we have not seen to date.

11:37 AM  
Blogger stet200 said...

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11:37 AM  

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