Understanding Energy in Annihilation: Proton-Antiproton vs. Neutron-Antineutron

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Proton-antiproton annihilation releases approximately 1.88 GeV of energy, while neutron-antineutron annihilation releases a total of 1.8 GeV overall, not per photon. The energy from these annihilations primarily goes into the energy of the resulting particles, with the decay typically producing mesons, particularly pions. The two-photon decay is considered rare in neutron-antineutron interactions. The discussion emphasizes the understanding of energy distribution in particle annihilation processes.
DaveSmith
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Hi there guys, this is my first post
I've just completed my first couple of semesters in BS in Applied physics, and Annihilation really amazes me, My question is

The proton antiproton annihilation at rest releases some 1.88 GeV energy
http://www.fnal.gov/pub/inquiring/questions/antimatter1.html

But does neutron antineutron annihilation releases 1.8 GeV energy overall or with each of the two photons it produces have 1.8 GeV energy?

http://en.wikipedia.org/wiki/Neutron-antineutron_annihilation
 
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The energy released by proton antiproton annihilation or neutron antineutron annihilation goes into the energy of particles that are produced in the final state. The two photon decay is rare. Most of the time the final particles are mesons.
 
Yes but can you refer to the wikipedia link I've given and narrate the energy release part in neutron-antineutron annihilation? Is it 1.8 GeV overall or with each of the two photons releasing 1.8 GeV seperately?
 
Meir Achuz said:
The energy released by proton antiproton annihilation or neutron antineutron annihilation goes into the energy of particles that are produced in the final state. The two photon decay is rare. Most of the time the final particles are mesons.

So you'd have rapid decay to electrons, photons, and neutrinos... or just photons and electrons?
 
DaveSmith said:
Yes but can you refer to the wikipedia link I've given and narrate the energy release part in neutron-antineutron annihilation? Is it 1.8 GeV overall or with each of the two photons releasing 1.8 GeV seperately?
It is 1.8 GeV overall, which is the rest energy of two nucleons.
 
nismaratwork said:
So you'd have rapid decay to electrons, photons, and neutrinos... or just photons and electrons?
The rapid decay is mostly to pi mesons.
 
Meir Achuz said:
The rapid decay is mostly to pi mesons.

Ooooh... right. OK, I can take pion decay from there... thanks Meir Achuz!
 
Yes of course...thanks Meir Achuz
 

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