  We investigate the sources of neutrino mass generation in Little Higgs
theories, by confining ourselves to the "Littlest Higgs" scenario. Our
conclusion is that the most satisfactory way of incorporating neutrino masses
is to include a lepton-number violating interaction between the scalar triplet
and lepton doublets. The tree-level neutrino masses generated by the vacuum
expectation value of the triplet are found to dominate over contributions from
dimension-five operators so long as no additional large lepton-number violating
physics exists at the cut-off scale of the effective theory. We also calculate
the various decay branching ratios of the charged and neutral scalar triplet
states, in regions of the parameter space consistent with the observed neutrino
masses, hoping to search for signals of lepton-number violating interactions in
collider experiments.
