  We study neutrinoless double beta decay in left-right symmetric extension of
the standard model with type I and type II seesaw origin of neutrino masses.
Due to the enhanced gauge symmetry as well as extended scalar sector, there are
several new physics sources of neutrinoless double beta decay in this model.
Ignoring the left-right gauge boson mixing and heavy-light neutrino mixing, we
first compute the contributions to neutrinoless double beta decay for type I
and type II dominant seesaw separately and compare with the standard light
neutrino contributions. We then repeat the exercise by considering the presence
of both type I and type II seesaw, having non-negligible contributions to light
neutrino masses and show the difference in results from individual seesaw
cases. Assuming the new gauge bosons and scalars to be around a TeV, we
constrain different parameters of the model including both heavy and light
neutrino masses from the requirement of keeping the new physics contribution to
neutrinoless double beta decay amplitude below the upper limit set by the GERDA
experiment and also satisfying bounds from lepton flavor violation, cosmology
and colliders.
