A texture of neutrino mass matrix in view of recent neutrino experimental results

Details A texture of neutrino mass matrix in view of recent neutrino experimental results A texture of neutrino mass matrix in view of recent neutrino experimental results

2002-09-24

arxiv.org/abs/hep-ph/0209280v1

Phys.Rev. D66 (2002) 053004

Physics

High Energy Physics

High Energy Physics - Phenomenology

Journal Ref.: Phys. Rev. D66, 053004 (2002)

Scientific paper

10.1103/PhysRevD.66.053004

In view of recent neutrino experimental results such as SNO, Super-Kamiokande (SK), CHOOZ and neutrinoless double beta decay $(\beta\beta_{0\nu})$, we consider a texture of neutrino mass matrix which contains three parameters in order to explain those neutrino experimental results. We have first fitted parameters in a model independent way with solar and atmospheric neutrino mass squared differences and solar neutrino mixing angle which satisfy LMA solution. The maximal value of atmospheric neutrino mixing angle comes out naturally in the present texture. Most interestingly, fitted parameters of the neutrino mass matrix considered here also marginally satisfy recent limit on effective Majorana neutrino mass obtained from neutrinoless double beta decay experiment. We further demonstrate an explicit model which gives rise to the texture investigated by considering an $SU(2)_L\times U(1)_Y$ gauge group with two extra real scalar singlets and discrete $Z_2\times Z_3$ symmetry. Majorana neutrino masses are generated through higher dimensional operators at the scale $M$. We have estimated the scales at which singlets get VEV's and M by comparing with the best fitted results obtained in the present work.

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