Is it possible to calculate neutron half-life theoretically? For example, from lattice QCD or something?
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https://physics.stackexchange.com/questions/31514/why-is-the-free-neutron-lifetime-so-long/31517#31517 – dmckee --- ex-moderator kitten Dec 27 '14 at 00:23
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Yes, it has been done in lattice QCD .
The most studied nucleon matrix element is that of the axial charge g_A. Because it can be measured precisely in neutron-decay experiments g_A provides a benchmark for of the accuracy of lattice-QCD nucleon matrix element calculations. The present quoted errors in lattice calculations of g_A are 6-10% but the lattice determinations are all systematically lower than the experimental measurement by about 10%, indicating the presence of an underestimated uncertainty.
anna v
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I would be very glad to have some chat with you on a problem of mine. Can you have some time? It's about my question on the Gamow state, http://physics.stackexchange.com/questions/154638/a-problem-with-the-gamow-state . – Sofia Dec 26 '14 at 20:15
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@Sofia I will have a look at the question and see if I can have an opinion. It is close to my bedtime here, but we certainly could chat sometime tomorrow afternoon or evening if you are around. ( it is 22:25 here) – anna v Dec 26 '14 at 20:26
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@Sofia well, I will be sitting close to the computer for three or four hours – anna v Dec 27 '14 at 16:02