Remnants of the Big Bang

[rov1200]

Now that experiments have shown that anti-matter exists what process from the Big Bang allows anti-matter to be produced?

[DTCwordfan]

there was also an allusion to new energy as well.....

Could Warp factors travel materialise....

I think what they are doing in Geneva (and the US) is fascinating as it may well see a step change in science, material management and energy.....

[heathfield]

It is theorised that matter and anti-matter should have been produced in equal quantities by the Big Bang. If this was the case, then just why matter should have won over anti-matter isn't clear, and they're presently still trying to figure out the reason for it.

[Clanad]

Particle physicists recognize some processes that generate slightly more matter than antimatter. "...In technical terms, those processes violate a symmetry known as "CP–symmetry". In a nutshell, a process obeys CP–symmetry if its results are identical after changing all particle positions to a mirror image and changing all particles to their antiparticles. CP–symmetry–violating processes can produce an excess of matter because they treat particles and antiparticles differently.

Cosmologists can explain the lack of antimatter in the universe if enough CP–symmetry violation occurred shortly after the big bang, resulting in more matter than antimatter. After the excess was produced and the universe cooled more, all the antimatter would have been annihilated with the normal matter, leaving a residue of matter and energy. Calculations show that it would take roughly one extra matter particle for every billion matter/antimatter pairs to generate the matter density of our universe.

One aspect of this explanation that troubles physicists is that the nature of the CP–symmetry violation seems unusual. In other words, its value differs from the theoretically expected value. If the symmetry–breaking were more in line with the expected value, the universe would contain too little matter for life to arise. This indicates fine–tuning in the amount of CP–symmetry violation..." (Source: "A Teacher's Guide to the Nuclear Science Wall Chart")

[jake-the-peg]

You're a bit behind - Antimatter was shown to exist in 1932 it won the 1936 Nobel prize.

CERN's recent achievement was to create and capture anti-matter atoms which is hard because they are electrically neutral.

matter and anti matter are routinely created all the time in equal and opposite amounts the Big question that Clanad refers to is whyy there seems to have been so much matter left over.

Of course galaxies that we see might be made of antimatter it would be impossible to tell unless we could see one colliding with a matter galaxy

[jomifl]

It may be that matter and antimatter was produced in nearly equal quantities an we are just the left overs perhaps less than a billionth of a percent