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wolram
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Why did matter dominate the universe ? if i read the BB corectly matter and
anti matter were (produced) in equal amounts.
anti matter were (produced) in equal amounts.
AlphaNumeric said:One reason (though not the full story if I remember my lectures correctly) is that there is something known as CP violation in the Weak interaction. There is an inherent bias in the Weak interaction which favours certain types of decay. Some theories talk about 'WIMPs' (Weaking Interacting Massive Particles) being very common in the early time of the universe and given their mechanism of decay being the Weak interaction they output slightly more of one type of matter than another, being what we now call 'matter'.
It's not enough to match up with some observations of the universe though if I remember correctly and other theories are brought into try to explain what we see in observations.
wolram said:Why did matter dominate the universe ? if i read the BB corectly matter and
anti matter were (produced) in equal amounts.
That's the thing, there are cases where things aren't equal, some quantum processes have an asymmetry. I can't really point you to any papers, I'm not one for reading papers unless someone points me to them for a specific thing.wolram said:This is where i get lost, all things being equal and opposite the BB should have been a net pure energy event
Can you put a link for your sources.I have herd about parrel universes but never anything about there being antimatter you one of them.white holes said:Let's imagine that thery are made in equal amounts. They would be converted to photons on contact but there is such things as parallel universe. There might be an anti-matter you. But please if you ever meet him don't shake hands! So means there would be another universe that is mainly anti-matter. It just take matter to be produce slightly more than anti-matter to create a matter universe. Justttt a little more would have a great difference as our universe is that big.
Let's ask the question from another viewpoint. Quantum theory tells us that the vacuum is teeming with virtual particle/antiparticle pairs - over 120 OOM more than we can detect via the expansive pressure or gravitational equivalence of the pairs. I believe that this is true, and that the expansive pressure and gravitational attraction are everywhere in dynamical balance in our universe. In this light, the overdensity of "real" matter in our universe is more of a minor statistical glitch than "domination".wolram said:Why did matter dominate the universe ? if i read the BB corectly matter and anti matter were (produced) in equal amounts.
turbo-1 said:Let's ask the question from another viewpoint. Quantum theory tells us that the vacuum is teeming with virtual particle/antiparticle pairs - over 120 OOM more than we can detect via the expansive pressure or gravitational equivalence of the pairs. I believe that this is true, and that the expansive pressure and gravitational attraction are everywhere in dynamical balance in our universe. In this light, the overdensity of "real" matter in our universe is more of a minor statistical glitch than "domination".
That's an astute question - I'll be banned for promoting a private theory if I answer you honestly, though.ray b said:so do all these virtual particles count as dark matter/energy while virtual
or as the nomal matter that is 5% of everything
As it began to cool, at around 10^-43 seconds after creation, there existed an almost equal yet asymmetrical amount of matter and antimatter. As these two materials are created together, they collide and destroy one another creating pure energy. Fortunately for us, there was an asymmetry in favor of matter. As a direct result of an excess of about one part per billion, the universe was able to mature in a way favorable for matter to persist. As the universe first began to expand, this discrepancy grew larger. The particles which began to dominate were those of matter. They were created and they decayed without the accompaniment of an equal creation or decay of an antiparticle.
Labguy said:Here is a bit about CP and the "matter-antimatter triangle".
http://www.fnal.gov/pub/inquiring/questions/cp_violations.html
http://www.fnal.gov/pub/ferminews/Ferminews00-08-25.pdf
http://www.umich.edu/~gs265/bigbang.htm
Apparently the new CP violation data is adding to the mystery of the matter-anti-matter imbalance of the visible universe, not solving the problem.ZapperZ said:New results from CDF producing even more convincing CP violation.
http://physicsweb.org/articles/news/10/4/6/1
Zz.
SpaceTiger said:In astronomy, pulsar J0437-4715 has a period measurement of:
P = 5.757451831071979(8) ms,
giving a precision of 0.000000000000014%. I think we got this one to an order of magnitude.
aguy2 said:Apparently the new CP violation data is adding to the mystery of the matter-anti-matter imbalance of the visible universe, not solving the problem.
If someone were to give me decent odds, I would still bet on an anti-matter sister universe.
aguy2
wolram said:Can you enlarge, aguy2 ?
Matter and anti-matter are two forms of physical substances that have opposite properties. Matter is made up of particles with positive charge, such as protons, neutrons, and electrons. On the other hand, anti-matter is made up of particles with negative charge, such as anti-protons, anti-neutrons, and positrons.
Scientists believe that in the early stages of the universe, both matter and anti-matter existed in equal amounts. However, through a process known as baryogenesis, a small asymmetry was created between the two, resulting in a slight excess of matter. This small excess allowed matter to dominate and form the structures we see in the universe today.
Anti-matter can be created through high-energy collisions, such as in particle accelerators, or through natural processes, such as radioactive decay. When matter and anti-matter collide, they annihilate each other and release a tremendous amount of energy.
Theoretically, anti-matter can be used as a powerful source of energy. However, it is currently not feasible due to the difficulty in producing and containing anti-matter. It also requires a significant amount of energy to create anti-matter, making it an inefficient source of energy at this time.
The dominance of matter in the universe has allowed for the formation of galaxies, stars, and planets. It also plays a crucial role in the existence of life, as the chemical reactions necessary for life to occur rely on the properties of matter. Understanding the reasons behind matter's dominance can also provide insights into the fundamental laws of physics and the origins of the universe.