Antiproton and positron annihilation

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SUMMARY

The discussion centers on the annihilation process involving antiprotons and positrons, clarifying that an antiproton cannot annihilate itself with a positron as they are not antiparticles of each other. Instead, an antiproton can capture a positron to form antihydrogen, releasing energy equivalent to the ionization energy plus the excess energy from the kinetic frame of reference. The annihilation of a particle and its antiparticle typically results in electromagnetic radiation, with the total energy of emitted photons being twice the rest mass energy of the particles involved, plus kinetic corrections.

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  • Understanding of particle physics concepts, particularly particle-antiparticle interactions.
  • Familiarity with the concept of ionization energy in atomic physics.
  • Knowledge of electromagnetic radiation and photon energy calculations.
  • Basic grasp of relativistic energy equations, specifically E=mc².
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  • Research the process of antihydrogen formation and its implications in particle physics.
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Sasho Andonov
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To make antihydrogen (an antiproton bound to a positron) requires supplies of positrons and antiprotons that are moving very slowly (enough to combine into atoms). I am wondering does someone have knowledge how much energy is released if antiproton annihilate itself with positron? What would be the outcome of this annihilation?
 
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Sasho Andonov said:
I am wondering does someone have knowledge how much energy is released if antiproton annihilate itself with positron? What would be the outcome of this annihilation?
An antiproton can't annihilate itself with a positron. They are not each other's antiparticle. An antiproton can "capture" a positron to form a neutral antihydrogen anti-atom. The energy released is exactly the same as for a proton "capturing" an electron: the ionization energy (absolute value) plus the free electron's excess (depends on the coordinate frame of reference).

In most cases, particle-antiparticle annihilation results in EM radiation (photons). The total energy of the photons is twice the energy associated with a single particle's rest mass (##~E_0=2mc^2~##) plus the excess due to the "kinetic" corrections.
 
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Sasho Andonov said:
I am wondering does someone have knowledge how much energy is released if antiproton annihilate itself with positron?
Generally annhiliation is between a particle and its antiparticle. The interaction between an antiproton and a positron would be equivalent to the interaction between a proton and an electron.
 

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