If electrons and their anti-particles positrons, with equal energies, 45.5 GeV,
ID: 2298607 • Letter: I
Question
If electrons and their anti-particles positrons, with equal energies, 45.5 GeV, are brought in to a head-on collision, they annihilate. The energy created as a result eventually manifests as several particles. What is the maximum mass particle pair of the list below that can be created in such a collision?
A pair of photons, with zero mass
Pair of oppositely charged muons, with ~100 MeV mass
Pairs of neutral B mesons, with mass of about 5 GeV each
A pair of W bosons with a mass of about 80 GeV each
A pair of photons, with zero mass
Pair of oppositely charged muons, with ~100 MeV mass
Pairs of neutral B mesons, with mass of about 5 GeV each
A pair of W bosons with a mass of about 80 GeV each
Explanation / Answer
A pair of photons, with zero mass
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