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How can elementary particles decay?

1 Answer
Jun 29, 2016

Answer:

Most elementary particles can't decay.

Explanation:

The elementary particles such as the photon, neutrinos and electron don't decay.

The heavier composite particles do decay. The neutron decays with a half life of about #10# minutes.

The big question is whether the proton decays. If it does the half life is billions of years or more. Proton decay has never been observed.