Why matter is dominant

[Daecon]

There has been lots of confusion as to why matter is dominant over anti-matter, but either I'm missing something - or the answer is pretty obvious...

 

If one takes into account that anti-matter exhibits the same characteristics of matter that is going backwards in time, we can safely assume that this is because anti-matter IS matter than is going backwards through time (as proposed by someone who's name I forget) - because the Universe only has one time dimension, almost all matter is propelled forward through time, and therefore most matter is NOT going backwards through time, and is therefore NOT anti-matter.

 

If there were two time dimensions then of course matter and anti matter would be present in the Universe in equal amounts, because there would be an equal amount going forward and backwards - but we only have one arrow of time, and therefore most matter is going forward through time and is "matter".

[bascule]

The answer I've always heard was that the overwhelming majority of matter in the universe was annihilated in the big bang, and there was an infintessimal amount more matter than antimatter, and because of that the majority of what was left over from that explosion is matter.

[Daecon]

But why was there this discrepancy to start with?

 

Perhaps at the very early stages of the Universe, duing the same primal conditions as when the Weak, Strong and EM forces were all equal - intense heat, pressure and size of space, there were 2 time dimensions.

 

This could account for the accelerated period of inflation (as there was extra time for the universe to expand all at once) and also mean matter and anti-matter were in equal amounts.

 

When the Universe grew in size and cooled sufficiently for the 3 forces to diverge, perhaps the two time dimensions diverged as well, with the 2nd time dimension no longer affecting us or having any influence at all. Maybe the 2nd time dimension also shrunk, instead of expanding like the 3 spacial dimensions... and curled up on itself, like the other numerous dimensions proposed by String theory.

 

This is all conjecture of course, but could it be possible?

[bascule]

But why was there this discrepancy to start with?

 

While you're at it, you should also be asking why the CMB is non-uniform. I've heard several explanations:

 

- Qunatum fluctuations

- Spontaneously broken symmetries

- Nonuniformities from an earlier universe from which ours descends

 

However, IANAP. Get someone with a clue to chime in on this.

[aguy2]

Maybe the 2nd time dimension also shrunk, instead of expanding like the 3 spacial dimensions...

 

Could time/space be a conserved system like matter/energy, where the sum of time/space remains a constant?

 

aguy2

[5614]

There was a thread on this a while ago and someone answered (approx) "how do you know antimatter didn't prevail?". What if what we call matter is actually antimatter? It's kinda of a pointless point, the point is that there were two types of matter which cannot really coexist in close proximity and so one dominated the other.

[swansont]

There was a thread on this a while ago and someone answered (approx) "how do you know antimatter didn't prevail?". What if what we call matter is actually antimatter? It's kinda of a pointless point, the point is that there were two types of matter which cannot really coexist in close proximity and so one dominated the other.

 

Or you just get photons, as the annihilations keep giving you lower energy photons until they are below the threshold to undergo pair production. (But obviously that didn't happen)

 

Perhaps they will find that the CP violation is stronger at higher energies when they get bigger and more powerful accelerators running. Or something else — if we already knew the answer it wouldn't be called research.

[Daecon]

While you're at it' date=' you should also be asking why the CMB is non-uniform. I've heard several explanations:

 

- Qunatum fluctuations

- Spontaneously broken symmetries

- Nonuniformities from an earlier universe from which ours descends

 

However, IANAP. Get someone with a clue to chime in on this.[/quote']

Gah... my brain's turned to mush. I forget what CMB and IANAP mean.

 

[EDIT: What about cumulative lensing and bending effects from the gravitational influences all the stars and galaxies in the Universe, disrupting the paths of Microwaves and making them appear non-uniform, has anyone been able to take into account gravity from all the rest of the matter in the Universe and it's effect on the paths of EM radiation through space?]

 

There was a thread on this a while ago and someone answered (approx) "how do you know antimatter didn't prevail?". What if what we call matter is actually antimatter? It's kinda of a pointless point, the point is that there were two types of matter which cannot really coexist in close proximity and so one dominated the other.

Because the terms "matter" and it's opposite are merely references to which direction it's travelling through time in?

 

Using entropy as a reference, we can say we're going "forward" through time, and matter that is also going through time in the same dierction as us is what we call "matter".