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We propose a new scaling ansatz in the neutrino Dirac mass matrix to explainthe low energy neutrino oscillations data, baryon number asymmetry andneutrinoless double beta decay. In this work, a full reconstruction of theneutrino Dirac mass matrix has been realized from the low energy neutrinooscillations data based on type-I seesaw mechanism. A concrete model based on$A_4$ flavor symmetry has been considered to generate such a neutrino Diracmass matrix and imposes a relation between the two scaling factors. In thismodel, the right-handed Heavy Majorana neutrino masses are quasi-degenerate atTeV mass scales. Extensive numerical analysis studies have been carried out toconstrain the parameter space of the model from the low energy neutrinooscillations data. It has been found that the parameter space of the Dirac massmatrix elements lies near or below the MeV region and the scaling factor$|\kappa_1|$ has to be less than 10. Furthermore, we have examined thepossibility for simultaneous explanation of both neutrino oscillations data andthe observed baryon number asymmetry in the Universe. Such an analysis givesfurther restrictions on the parameter space of the model, thereby explainingthe correct neutrino data as well as the baryon number asymmetry via a resonantleptogenesis scenario. Finally, we show that the allowed space for theeffective Majorana neutrino mass $m_{ee}$ is also constrained in order toaccount for the observed baryon asymmetry.

$TeV$-Scale Resonant Leptogenesis with New Scaling Ansatz on Neutrino Dirac Mass Matrix from $A_4$ Flavor Symmetry