Type-II see-saw at μ+ μ− collider

The e + e − pair production at μ + μ − collider

Tests of Higgs Boson Couplings at a μ+μ− Collider

We investigate the potential of a muon collider for testing the Higgs boson couplings. We consider the case of a light (less than 160 GeV ) Higgs boson and we study the possible non standard couplings induced by dim = 6 SU(3) × SU(2) × U(1) gauge invariant operators satisfying the constraints imposed by the present and future LHC and LC colliders. For each operator we give the minimal value of ...

Top Polarization at a μ + μ − Collider 1

The top quark pairs produced at a polarized muon collider are in a (nearly) pure spin configuration. This result holds for all center-of-mass energies, and is insensitive to the next-to-leading order QCD radiative corrections. The decay products of a polarized top quark show strong angular correlations. We describe an interesting interference effect between the left-handed and longitudinally po...

Testing the see - saw mechanism at collider energies

We propose a low energy extension of the Standard Model consisting of an additional gauged U(1) B−L plus three right-handed neutrinos. The lightest right-handed neutrinos have TeV scale masses and may be produced at colliders via their couplings to the Z B−L gauge boson whose mass and gauge coupling is constrained by the out-of-equilibrium condition leading to upper bounds on the right-handed n...

Type-III see-saw at LHC

Neutrino masses can be generated by fermion triplets with TeV-scale mass, that would manifest at LHC as production of two leptons together with two heavy SM vectors or higgs, giving rise to final states such as 2`+ 4j (that can violate lepton number and/or lepton flavor) or ` + 4j + / ET . We devise cuts to suppress the SM backgrounds to these signatures. Furthermore, for most of the mass range...