Numerical consistency check between two approaches to radiative corrections for neutrino masses and mixings

Details Numerical consistency check between two approaches to radiative corrections for neutrino masses and mixings Numerical consistency check between two approaches to radiative corrections for neutrino masses and mixings

2004-07-16

arxiv.org/abs/hep-ph/0407185v2

Pramana65:995-1013,2006

Physics

High Energy Physics

High Energy Physics - Phenomenology

26 pages, 5 figures,references added, typos corrected and text modified

Scientific paper

10.1007/BF02705276

We briefly outline the two popular approaches on radiative corrections to neutrino masses and mixing angles, and then carry out a detailed numerical analysis for a consistency check between them in MSSM. We find that the two approaches are nearly consistent with a small discrepancy of a factor of 13 percent in mass eigenvalues at low energy scale, but the predictions on mixing angles are almost consistent. We check the stability of the three types of neutrino models, i.e., hierarchical, inverted hierarchical and degenerate models, under radiative corrections, using both approaches, and find consistent conclusions. The neutrino mass models which are found to be stable under radiative corrections in MSSM are the normal hierarchical model and the inverted hierarchical model with opposite CP parity. We also carry out numerical analysis on some important conjectures related to radiative corrections in MSSM, viz., radiative magnification of solar and atmospheric mixings in case of nearly degenerate model having same CP parity (MPR conjecture) and radiative generation of solar mass scale in exactly two-fold degenerate model with opposite CP parity and non-zero reactor angle (JM conjecture). We observe certain exceptions to these conjectures. Finally the effect of scale-dependent vacuum expectation value in neutrino mass renormalisation is discussed.

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