Is the Charge of a Positron the Same as a Proton?

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Discussion Overview

The discussion centers around the properties of positrons and protons, specifically focusing on their charges and the nature of antiparticles. Participants explore theoretical concepts related to particle physics, including charge, mass, and interactions between particles and their antiparticles.

Discussion Character

  • Exploratory
  • Technical explanation
  • Conceptual clarification
  • Debate/contested

Main Points Raised

  • Some participants propose that the charge of a positron is +1.60 x 10^-19, which is the same as that of a proton, leading to confusion about their differences.
  • Others argue that while positrons and protons share the same charge, they differ significantly in mass and composition, with positrons being elementary particles and protons being composed of quarks.
  • A participant mentions the concept of a positron as an electron moving backward in time, questioning the properties that define antiparticles.
  • It is noted that when a particle collides with its antiparticle, they annihilate, resulting in energy release, which is not solely dependent on charge, as seen in neutron-antineutron interactions.
  • Several participants discuss the properties of antiparticles, highlighting that electric charge, color charge, and flavor are all opposite in antiparticles, affecting their interactions.
  • A later reply questions whether spin (chirality) is also reversed in antiparticles and mentions the concept of "CPT Pairs."

Areas of Agreement / Disagreement

Participants express various viewpoints on the properties of positrons and protons, with no consensus reached regarding the implications of these properties or the nature of antiparticles.

Contextual Notes

Participants reference multiple properties of antiparticles, but there is no resolution on the implications of these properties or their interrelations. The discussion includes speculative ideas about particle interactions and theoretical concepts that remain open to interpretation.

dleacock
I was reading that the antiparticle of a particle is the same, except it has an opposite charge, which cancels it out. if the charge of an electron is -1.60 x 10^-19, would that make the charge of the positron +1.60 x 10^-19? but isn't that also the charge of the proton? I must be missing something...:rolleyes:

thanks
dleacock
 
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Positron and proton have the same charge. The main difference is in mass and also composition. Positron is elementary while proton consists of 3 quarks (2 up and 1 down) held together by gluons.
 
I've also heard a positron be called a electron moving backwards in time, or something similar like that. What is it about the property of an antipartcile that cancels out the particle, just its charge?

thanks
 
Particle moving backward in time is a way to visualize antiparticle. (according to many leading physicsts, nobody really understands quantum theory).
When a particle colides with its antiparticle, they both disappear into a burst of energy (two gamma rays usually). It has nothing to do with charge - neutron plus antineutron leads to the same result.
 
dleacock said:
What is it about the property of an antipartcile that cancels out the particle, just its charge?

As far as I know, there are three properties that are "opposite" in antiparticles:

the electric charge, which determines the nature of the electric force on the particle.

the "color charge," which determines the nature of the strong interaction between two particles (i.e. there are red, green and blue quarks, and anti-red, anti-green and anti-blue antiquarks).

The "flavor" which determines the nature of the weak interaction between two particles. For example, it's what distinguishes an electron, a muon and a tau; or an electron-neutrino, muon-neutrino, and a tau-neutrino. An electron can interact to produce an electron-neutrino but not an anti-electron-neutrino, or a muon-neutrino, or a tau-neutrino.
 
jtbell said:
As far as I know, there are three properties that are "opposite" in antiparticles:

the electric charge, which determines the nature of the electric force on the particle.

the "color charge," which determines the nature of the strong interaction between two particles (i.e. there are red, green and blue quarks, and anti-red, anti-green and anti-blue antiquarks).

The "flavor" which determines the nature of the weak interaction between two particles. For example, it's what distinguishes an electron, a muon and a tau; or an electron-neutrino, muon-neutrino, and a tau-neutrino. An electron can interact to produce an electron-neutrino but not an anti-electron-neutrino, or a muon-neutrino, or a tau-neutrino.

JT, isn't the spin (chirality) backward too? Aren't antiparticles "CPT Pairs"?
 

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