What is the difference between anti-particle & exotic matter

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Discussion Overview

The discussion centers on the differences between anti-particles and exotic matter, exploring their properties, behaviors, and theoretical implications. It includes conceptual clarifications and technical explanations related to their mass, reactions to forces, and the notion of time in particle physics.

Discussion Character

  • Conceptual clarification
  • Debate/contested
  • Technical explanation

Main Points Raised

  • Some participants propose that exotic matter has negative mass and behaves oppositely to normal matter when subjected to force.
  • Others argue that exotic matter has never been experimentally observed and may not exist, while anti-particles have positive mass and have been observed for decades.
  • A participant questions whether anti-particles react to forces like exotic matter, suggesting a potential similarity.
  • It is noted that anti-particles, such as positrons, react to forces in the same way as regular particles, with attraction based on opposite charges.
  • Some participants express curiosity about the concept of anti-particles being described as traveling backwards in time, seeking clarification on the reasoning behind this description.
  • A later reply emphasizes the importance of mathematics in understanding these concepts in physics.

Areas of Agreement / Disagreement

Participants do not reach a consensus on the existence of exotic matter, with some asserting its non-existence while others focus on the established nature of anti-particles. The discussion remains unresolved regarding the implications of anti-particles traveling backwards in time.

Contextual Notes

Limitations include the lack of experimental evidence for exotic matter and the dependence on mathematical descriptions for understanding anti-particles' behavior.

jackyruth
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Exotic matter have a negative mass and goes in the opposite direction of the force applied to it. These properties seem like the opposite of normal matter. I heard anti particles travel backwards in time, I can easily imagine a particle falling due to gravity in reverse time as a object that seem to move the opposite direction of a applied force. So what is the difference between anti-particle and exotic matter?
 
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Exotic matter has neever been experimentally observed and probably it does not exist at all.

Antiparticles have positive mass and they have been observed already 80 years ago and they have been in use in practical applications for decades every day all over the world in lots of devices and machines (like the positron emission tomography).

Also, let me quote bhobba: "Anitiparticles do not literally travel back in time - its just a way to describe it mathematically."
 
Oh thx. But do anti particle react like exotic matter when force is applied?
 
jackyruth said:
Oh thx. But do anti particle react like exotic matter when force is applied?

No, antiparticles react to "force" in the same way as particles. Electrons and positrons (poistrons are antielectrons) have opposite charge and they are attracted. The positron is not running away from an electron.
 
So why do people mention it seem to be a particle traveling backwards in time.
I know it's not really doing that but there must be a reason why people say that
 
As with everything in physics, without maths none of it makes sense.
 

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