Heavy neutrinos, Z' and Higgs bosons at the LHC: new particles from an old symmetry

Understand

A new era in particle physics is being spurred on by new data from the Large Hadron Collider.

• Non-vanishing neutrino masses represent firm observational evidence of new physics beyond the Standard Model.
• An extension of the latter, based on a SU(3)_C x SU(2)_L x U(1)_Y x U(1)_{B-L} symmetry, incorporating an established Baryon minus Lepton number invariance, is proposed as a viable and testable solution to the neutrino mass problem.
• We argue that LHC data will probe all the new content of this model: heavy neutrinos, an extra gauge boson emerging from spontaneous breaking of the additional gauge group at the TeV scale, onset by a new heavier Higgs boson, also visible at the CERN proton-proton collider.