  We study the survivability of neutrino mass models with normal as well as
inverted hierarchical mass patterns in the presence of both type I and type II
seesaw contributions to neutrino mass within the framework of generic
left-right symmetric models. At leading order, the Dirac neutrino mass matrix
is assumed to be diagonal with either charged lepton (CL) type or up quark (UQ)
type structure which gets corrected by non-leading effects giving rise to
deviations from tri-bi-maximal (TBM) mixing and hence non-zero value of
$\theta_{13}$. Using the standard form of neutrino mass matrix which
incorporates such non-leading effects, we parametrize the neutrino mass matrix
incorporating both oscillation as well as cosmology data. Also considering
extremal values of Majorana CP phases such that the neutrino mass eigenvalues
have the structure $(m_1, -m_2, m_3)$ and $(m_1, m_2, m_3)$, we then calculate
the predictions for neutrino parameters in the presence of both type I and type
II seesaw contributions, taking one of them dominant and the other
sub-dominant. We show that these mass models can survive in our framework with
certain exceptions.

High Energy Physics - Phenomenology