Study of type-I and type-II Seesaw dominance introduced Majorana type Yukawa coupling matrices for low energy observables within left-right symmetric model.

Left-right symmetric model is one of the simplest extensions of the Standard model. Primarily proposed to account for parity violation it includes many novel features; one of them is the light neutrino mass generation through the seesaw mechanism. As the leptonic Yukawa interactions in the Left-right symmetric lagrangian include both Dirac and Majorana type couplings, the light neutrino mass in this model is, where " f " is the Majorana type and " " is the Dirac type Yukawa coupling matrix. The vacuum expectation values of the doublet Higgs and the right(left) handed triplet Higgs is represented by "  " and "  " respectively . The first and second terms on the right side of the preceding equation are type-II and type-I Seesaw contributions respectively, Assuming a particular texture for "  " and utilizing the light neutrino data from experiments the Majorana coupling " f " admits eight solutions. Our work is focused on discriminating among the eight solutions keeping in mind the different dominance (type-I and type-II ) introduced in the Majorana type Yukawa coupling matrices and finding the most suitable " f " matrix for low energy processes, like neutrinoless double beta decay (0νββ), (μ → e + γ) type LFV decay, etc. We can expect the best result giving matrices that can be used to correlate the theory with near-future experimental results at least in defined energy bound (especially for ).