Early annihilation of antimatter

In summary, the conversation discussed the idea of positrons moving backwards in time and whether this could explain the absence of antimatter in the early universe. However, it was clarified that nothing can move backwards in time and that the idea of positrons moving backwards is simply a mathematical relationship used for calculations. The present cannot influence the past and the cause must always precede the effect.
  • #1
Jared409
8
0
If a positron can be seen as an electron moving backwards in time technically, could it be that antimatter was annihilated near the beginning of the universe because it could go no further backwards in time that at the moment of the big bang, leaving only matter going forward in time?
 
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  • #2
Jared409, I know the popular accounts say things like this, but nothing moves backwards in time, not even positrons. The present cannot influence the past. The cause must always precede the effect, and this applies even to antiparticles.

There is a mathematical relationship between a process which emits an electron into the final state and a process which absorbs a positron from the initial state but is otherwise the same. The relationship is useful in doing calculations, but should not be taken literally as time travel.
 
  • #3
Okay, that's what I had heard once before, but I wasn't completely sure on the subject. Thanks for clearing that up for me!
 

1. What is "early annihilation" of antimatter?

Early annihilation of antimatter refers to the process of destruction of antimatter particles before they can interact with their corresponding matter particles. This phenomenon is significant in the study of antimatter because it leads to the disappearance of antimatter from the universe and poses a challenge to understanding the observed asymmetry between matter and antimatter in our universe.

2. How does early annihilation of antimatter occur?

Early annihilation of antimatter can occur through various processes such as annihilation with matter particles, decay into other particles, or annihilation with other antimatter particles. These processes result in the conversion of the mass of antimatter into energy, producing gamma rays and other particles.

3. Why is early annihilation of antimatter important in scientific research?

The study of early annihilation of antimatter is crucial in understanding the fundamental laws of physics and the origin of our universe. It also has practical applications in medical imaging and cancer treatment, as well as in the development of new technologies such as antimatter propulsion for space exploration.

4. Can early annihilation of antimatter be harnessed for energy production?

While the annihilation of antimatter does produce a large amount of energy, it is currently not feasible to harness it for energy production. The process of creating and storing antimatter is extremely difficult and expensive, making it impractical for use as an energy source at this time.

5. Are there any ongoing experiments or studies focused on early annihilation of antimatter?

Yes, there are several ongoing experiments and studies focused on understanding the process of early annihilation of antimatter. These include experiments at CERN's Large Hadron Collider, as well as studies using particle accelerators and other advanced technologies to create, manipulate, and observe antimatter particles.

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