2002/09/20 by Ambar Ghosal, Debasish Majumdar
Physics and Astronomy · #Astrophysics and Cosmic Phenomena #Neutrino Physics Research #Particle physics theoretical and experimental studies #hep-ph
paper · pdf · doi:10.1103/physrevd.66.053004
published as Phys.Rev. D66 (2002) 053004 · Journal Ref.: Phys. Rev. D66, 053004 (2002)
openalex publication_date 2002/09/20 · arxiv created 2002/09/24 · arxiv updated 2009/11/30 · openalex created_date 2025/10/10 · openalex updated_date 2026/07/28
In view of recent neutrino experimental results such as SNO, Super-Kamiokande (SK), CHOOZ and neutrinoless double beta decay (\ensuremathβ\ensuremathβ_0\ensuremathν), we consider a texture of neutrino mass matrix which contains three parameters in order to explain those neutrino experimental results. We first fitted the parameters in a model independent way with solar and atmospheric neutrino mass squared differences and a solar neutrino mixing angle which satisfies the LMA solution. The maximal value of the atmospheric neutrino mixing angle comes out naturally in the present texture. Most interestingly, the fitted parameters of the neutrino mass matrix considered here also marginally satisfy the recent limit on the effective Majorana neutrino mass obtained from the neutrinoless double beta decay experiment. We further demonstrate an explicit model which gives rise to the texture investigated by considering an SU(2)L\ifmmode×\else\texttimes\fiU(1)Y gauge group with two extra real scalar singlets and a discrete Z2\ifmmode×\else\texttimes\fiZ3 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.