The Large Hadron Collider could be a discovery machine for the neutrino mass pattern and its Majorana nature in the context of a well-motivated TeV scale Type II seesaw model. This is achieved by identifying the flavor structure of the lepton-number violating decays of the charged Higgs bosons. The observation of either $H^{+}\to {\tau }^{+}\overline{\nu }$ or $H^{+}\to e^{+}\overline{\nu }$ will be particularly robust to determine the neutrino spectra since they are independent of the unknown Majorana phases, which could be probed via the $H^{++}\to e_i^{+}{e}_j^{+}$ decays. In a less favorable scenario when the leptonic channels are suppressed, one needs to observe the decays $H^{+}\to W^{+}{H}_1$ and $H^{+}\to t\overline{b}$ to confirm the triplet-doublet mixing that implies the Type II relation. The associated production $H^{\pm \pm }{H}^{\mp }$ is crucial in order to test the triplet nature of the Higgs field.

• Received 28 March 2008

DOI:https://doi.org/10.1103/PhysRevD.78.071301