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:
- 0706.0441 [hep-ph]
Report number:
- MADPH-07-1488,
- HRI-P-07-05-001
View in:
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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
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