Heavy neutrino signals at large hadron colliders

Abstract

We study the LHC discovery potential for heavy Majorana neutrino singlets in the process pp -> W+ -> l+ N -> l+ l+ jj (l=e,mu) plus its charge conjugate. With a fast detector simulation we show that backgrounds involving two like-sign charged leptons are not negligible and, moreover, they cannot be eliminated with simple sequential kinematical cuts. Using a likelihood analysis it is shown that, for heavy neutrinos coupling only to the muon, LHC has 5 sigma sensitivity for masses up to 200 GeV in the final state mu+- mu+- jj. This reduction in sensitivity, compared to previous parton-level estimates, is driven by the ~ 10^2-10^3 times larger background. Limits are also provided for e+- e+- jj and e+- mu+- jj final states, as well as for Tevatron. For heavy Dirac neutrinos the prospects are worse because backgrounds involving two opposite charge leptons are much larger. For this case, we study the observability of the lepton flavour violating signal e+- mu-+ jj. As a by-product of our analysis, heavy neutrino production has been implemented within the ALPGEN framework.

arXiv commentLatex 36 pages, 49 PS figures. Major extension incorporating analysis for e+- e+-, e+- mu+- and e+- mu-+ final states. Final version to appear in JHEP

References in corpus (28)

• PYTHIA 6.4 Physics and Manual
• PYTHIA 6.2 Physics and Manual
• A Unified Approach to the Classical Statistical Analysis of Small Signals
• ALPGEN, a generator for hard multiparton processes in hadronic collisions
• Radiatively Induced Neutrino Masses and Large Higgs-Neutrino Couplings in the Standard Model with Majorana Fields
• Flavour-Violating Charged Lepton Decays in Seesaw-Type Models
• Signatures for Majorana neutrinos at hadron colliders
• Probing Lepton Number Violation via Majorana Neutrinos at Hadron Supercolliders
• Non-decoupling of Heavy Neutrinos and Lepton Flavour Violation
• Testing neutrino mixing at future collider experiments
• Sterile neutrinos in neutrinoless double beta decay
• Signature for heavy Majorana neutrinos in hadronic collisions
• Z-induced FCNCs and their effects on Neutrino Oscillations
• Resonant CP Violation due to Heavy Neutrinos at the LHC
• Signal of heavy Majorana neutrinos at hadron colliders
• Search for Heavy Isosinglet Neutrino in e+e- Annihilation at LEP
• Neutrino properties and the decay of the lightest supersymmetric particle
• Neutrino physics at large colliders
• Resonant Slepton Production in Hadron-Hadron Collisions
• l W nu production at CLIC: a window to TeV scale non-decoupled neutrinos
• Neutrinoless double beta decay and direct searches for neutrino mass
• Inclusive Search for New Physics with Like-Sign Dilepton Events in ppbar Collisions at sqrt{s} = 1.96 TeV
• Flavour and polarisation in heavy neutrino production at e+ e- colliders
• Matter effects and CP violating neutrino oscillations with non-decoupling heavy neutrinos
• Prospect of Heavy Right-Handed Neutrino Search at SSC/LHC Energies
• New Fermions at e${}^{+}$e${}^{-}$ Colliders: II.~Signals and Backgrounds
• Light Higgs boson discovery from fermion mixing
• Heavy neutrinos production and decay in future $e^{+}{e}^{-}$ colliders

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