Renormalization Group Evolution of Dirac Neutrino Masses

Details Renormalization Group Evolution of Dirac Neutrino Masses Renormalization Group Evolution of Dirac Neutrino Masses

2005-06-28

arxiv.org/abs/hep-ph/0506280v2

JHEP0509:081,2005

Physics

High Energy Physics

High Energy Physics - Phenomenology

19 pages, 5 figures; error in eq. 8 corrected, references added

Scientific paper

10.1088/1126-6708/2005/09/081

There are good reasons why neutrinos could be Majorana particles, but there exist also a number of very good reasons why neutrinos could have Dirac masses. The latter option deserves more attention and we derive therefore analytic expressions describing the renormalization group evolution of mixing angles and of the CP phase for Dirac neutrinos. Radiative corrections to leptonic mixings are in this case enhanced compared to the quark mixings because the hierarchy of neutrino masses is milder and because the mixing angles are larger. The renormalization group effects are compared to the precision of current and future neutrino experiments. We find that, in the MSSM framework, radiative corrections of the mixing angles are for large \tan\beta comparable to the precision of future experiments.

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