Everyone keeps telling me its just 10.3 minutes and no one knows how to get that number form theory. Any idea?
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3See my answer to Why is the (free) neutron lifetime so long?. – dmckee --- ex-moderator kitten Dec 04 '14 at 01:28
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1@dmckee we should close as a dupe of your answer. – Carl Witthoft Dec 04 '14 at 01:31