Pair production of doubly-charged scalars: Neutrino mass constraints and signals at the LHC

Jun, 2007
22 pages
Published in:
  • Phys.Rev.D 76 (2007) 075013
e-Print:
Report number:
  • MADPH-07-1488,
  • HRI-P-07-05-001

Citations per year

200720112015201920230510152025
Abstract: (arXiv)
We study the pair production of doubly charged Higgs bosons at the Large Hadron Collider (LHC), assuming the doubly charged Higgs to be part of an SU(2)_L triplet which generates Majorana masses for left-handed neutrinos. We point out that, in addition to the Drell-Yan (DY) production mechanism, two-photon processes also contribute to HH production at a level comparable to the QCD corrections to the DY channel. Decays of the doubly charged Higgs into both the l+l+ and W+W+ modes are studied in detail to optimize the signal observation over the backgrounds. Doubly charged scalars should be observable at the LHC in the four-lepton channel upto the mass range of 800 GeV-1 TeV even with a branching fraction of the order of 50%, and in the WW channel upto a mass of 650 GeV. Contribution from single production of doubly charged scalars is negligible. Such a doubly charged Higgs cannot be long-lived on the scale of collider detectors, if they are members of a triplet generating neutrino masses.
  • 14.80.Cp
  • p p: inclusive reaction
  • Higgs particle: pair production
  • Higgs particle: charged particle
  • charge: 2
  • Drell-Yan process
  • photon photon: fusion
  • channel cross section
  • Higgs particle: mass
  • transverse momentum: spectrum