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cjackson
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I don't understand why antimatter exists in the first place. Could you explain why and how an asymmetry developed between matter and antimatter?
You mean CP violation, right?Chronos said:Some as of yet unknown form of CPT violation is the prime suspect.
I don't understand why antimatter exists in the first place. Could you explain why and how an asymmetry developed between matter and antimatter?
euclideanspace said:Anti-Helium is composed of 2 (-) Anti-protons, 2 neutrons and 2 (+) positrons (anti-electrons)
For antiHe you need antineutrons. They are not the same as neutrons
Positrons and antiprotons exist in nature, they are just rare and if they hit matter (like earth) they annihilate quickly.euclideanspace said:Anti-matter exists only in the laboratory - artificially - through synthesis.
And all other quantum numbers. And they are not absolutely identical, there is CP violation.Matter and Antimatter are absolutely identical and indistinguishable in every aspect
other than charge.
This is just wrong. Only the weak interaction cares about chirality at all, and this interacts only with left-handed fermions ("matter"), not with right-handed.The reason matter exists in nature and Anti-matter has to be synthesized
is due to Chirality (helical oriention) All matter follows the right-handed rule of chirality,
Anti-matter follows the left-handed rule of chirality, and is not found in nature.
How is it "simplified" to list wrong particles?Correct, this was only a simplified explanation of the principle
euclideanspace said:Anti-matter exists only in the laboratory - artificially - through synthesis.
...
Anti-matter follows the left-handed rule of chirality, and is not found in nature.
Antimatter is a type of matter that is composed of particles with the same mass as regular matter, but with opposite charge. This means that antimatter particles, such as antiprotons and positrons, have a positive charge instead of a negative charge like regular matter particles.
Antimatter exists because it is predicted by the fundamental laws of physics, specifically the Standard Model of particle physics. According to this model, for every particle of matter, there is a corresponding antiparticle of antimatter with the same mass and opposite charge. This is known as the principle of charge-parity symmetry.
Antimatter can be created through high-energy collisions between particles, such as in particle accelerators, or through certain types of radioactive decay. It can also be produced naturally in small amounts, such as in cosmic rays from outer space.
Antimatter has the potential to be used as a powerful source of energy, as its annihilation with regular matter produces a large amount of energy. It is also used in medical imaging, such as in PET scans, and in scientific research to study the fundamental properties of matter.
While antimatter may sound dangerous due to its ability to release large amounts of energy, it is actually difficult to create and store in significant quantities. Additionally, when antimatter comes into contact with regular matter, it annihilates and releases energy, making it relatively safe to handle in controlled environments.