antiproton
Sign in to saveThe antiproton, , (pronounced p-bar) is the antiparticle of the proton. Antiprotons are stable, but they are typically short-lived, since any collision with a proton will cause both particles to be annihilated in a burst of energy.
AI overview
An antiproton is a particle that is identical to a proton in most ways but has the opposite electrical charge, and it's the antimatter counterpart of the proton. Antiprotons are important for understanding the fundamental nature of matter because when they collide with regular protons, both particles instantly convert into pure energy.
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Key facts
- Particle.name
- Antiproton
- Particle.image
- 200px
- Particle.caption
- The quark content of the antiproton.
- Particle.classification
- Antibaryon
- Particle.composition
- 2 up antiquarks, 1 down antiquark
- Particle.statistics
- Fermionic
- Particle.group
- Hadron
- Particle.interaction
- Strong, weak, electromagnetic, gravitation
- Particle.antiparticle
- Proton
- Particle.discovered
- Emilio Segrè & Owen Chamberlain (1955)
- Particle.mean_lifetime
- the same as that of the proton
- Particle.spin
- ħ
Article
8 sectionsContents
- Occurrence in nature
- List of recent cosmic ray detection experiments
- Modern experiments and applications
- Production
- Measurements
- Possible applications
- See also
- References
The antiproton, , (pronounced p-bar) is the antiparticle of the proton. Antiprotons are stable, but they are typically short-lived, since any collision with a proton will cause both particles to be annihilated in a burst of energy.
The existence of the antiproton with electric charge of , opposite to the electric charge of of the proton, was predicted by Paul Dirac in his 1933 Nobel Prize lecture. Dirac received the Nobel Prize for his 1928 publication of his Dirac equation that predicted the existence of positive and negative solutions to Einstein's mass–energy equation () and the existence of the positron, the antimatter analog of the electron, with opposite charge and magnetic moment.