Mass generation of the lepton sector

Details Mass generation of the lepton sector Mass generation of the lepton sector

1997-05-15

arxiv.org/abs/hep-ph/9705325v1

Physics

High Energy Physics

High Energy Physics - Phenomenology

LaTex 17 pages, for the proceeding of the 1997 Shizuoka workshop on masses and mixings of quarks and leptons (March 19-21, Shi

Scientific paper

We discuss the necessity of a right-handed Weyl neutrino due to the vector-like phenomenon of the regularized Standard Model. It is shown that this right-handed neutrino is decoupled from low energies as a free particle, and Dirac neutrino masses are very small. We suggest gauge-invariant couplings between down quarks and charged leptons so that charged leptons acquire masses without extra Goldstone modes. By examining Schwinger-Dyson equations for lepton self-energy functions, we show that the neutrinos get their Dirac masses via explicit symmetry breakings that attribute to the mixing between neutrinos and charged leptons. An analysis of these Dyson equations gives the four relationships between inter-generation mixing angles and lepton masses.

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