Speaker
Description
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 seesaw mechanism. As the leptonic Yukawa interactions in the Left-right symmetric lagrangian includes both Dirac and Majorana type couplings, the light neutrino mass in this model is, $m_{\nu} \simeq f v_L - \frac{v_H^2}{v_R}y_Df^{-1}y_D^T$, where $f$ is the Majorana type and $y_D$ is the Dirac type Yukawa coupling matrix. The vacuum expectation values of the doublet Higgs and the right(left) handed triplet Higgs are represnted by $v_H$ and $v_L(v_R)$ respectively. The first and second term in the right side of the preceding equation are type-II and type-I Seesaw contributions respectively. Assuming a particular texture for $y_D$ and utilising 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 or 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 ($0\nu\beta\beta$), $\mu \rightarrow e + \gamma$ type LFV decay etc. We can expect the best result giving matrices can be used to correlate the theory with near future experimental results at least in a defined energy bound (specially for $v_R$).
