Timeline for What are ordinary mass-terms (of neutrinos)?
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| Jun 15, 2020 at 11:49 | comment | added | Stratiev | That's a much longer answer, but essentially the answer boils down to the fact that the physical mass of a particle is determined by the pole in the true (renormalized) propagator of the particle. This is defined as the 2-point function in a theory. In an interacting theory this propagator receives corrections from perturbation theory that can change the position of the pole and hence the value of the physical mass. | |
| Jun 15, 2020 at 10:34 | comment | added | user7077252 | I believe you must be right, as later PMNS matrices are used in the paper to relate such mass terms. Makes perfect sense to me. Thank you very much. Could you just explain to me slightly, how it is that the coupling of mass terms could be obtained through renormalisation? I struggle to understand renormalisation. | |
| Jun 15, 2020 at 10:32 | vote | accept | user7077252 | ||
| Jun 17, 2020 at 9:12 | |||||
| Jun 15, 2020 at 10:15 | history | answered | Stratiev | CC BY-SA 4.0 |