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# III II I Relations between masses and mixing angles.

## Präsentation zum Thema: "III II I Relations between masses and mixing angles."—  Präsentation transkript:

III II I

Relations between masses and mixing angles

III II I

Ewigkeit ist lang, speziell gegen dem Ende zu.W.A.Ewigkeit ist lang, speziell gegen dem Ende zu.W.A.

What type of mass term? How big or small are masses? How big are the mixing angles? Relations among angles and masses?

Neutrino Masses: Mass terms for charged leptons and neutrinos are not parallel  Neutrino Mixing

Neutrino mixing V=UxP

Observation:

m(1) = 0.0036 … 0.0059 eV m(2) = 0.0085 … 0.0140 eV m(3) = 0.044 … 0.058 eV

Neutrino masses less hierarchical than the masses of the charged leptons

Neutrinoless Double Beta Decay

Conclude: Fermion masses remain a mystery. Neutrino masses might be Dirac masses or Majorana masses. Mixing angles for quarks are fixed by ratios of quark masses. Very good agreement with experiment.

This works also well for leptons. One finds, using the observed mass differences: m(1)/m(2)=0.42, m(2)/m(3)=0.19. m(1): 0.0041 eV m(2): 0.0097 eV m(3): 0.051 eV

Atmospheric angle about 40 degrees Neutrinoless double beta decay: difficult

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