Supersymmetric threshold corrections to Δm^2_{\odot}

Details Supersymmetric threshold corrections to Δm^2_{\odot} Supersymmetric threshold corrections to Δm^2_{\odot}

2003-12-02

arxiv.org/abs/hep-ph/0312030v2

Phys.Lett. B596 (2004) 184-190

Physics

High Energy Physics

High Energy Physics - Phenomenology

Revised version, Accepted for publication in Physics Letters B

Scientific paper

10.1016/j.physletb.2004.03.004

For nearly degenerate neutrinos, quantum corrections can modify the tree-levelmasses via low energy supersymmetric threshold corrections comparable to the solar oscillation mass scale. We numerically calculate corrections to neutrino masses in minimal supergravity (mSugra) and Gauge Mediated Supersymmetry Breaking (GMSB) scenarios and identify parameter spaces in the high energy regime for which the solar neutrino mass splitting becomes too large compared to the LMA solution. We show that such considerations can give bounds on GMSB and mSugra models which can be useful. On the contrary, if we start from degenerate mass eigenvalues at the tree level, these threshold corrections being generation dependent, can also produce the required mass splitting at solar scale for regions of parameter space.

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