New Production Mechanism for Heavy Neutrinos at the LHC

PS Bhupal Dev, Apostolos Pilaftsis, Un-ki Yang

    Research output: Contribution to journalArticlepeer-review


    We study a new production mechanism for heavy neutrinos at the LHC, which dominates over the usually considered s-channel W-exchange diagram for heavy-neutrino masses larger than 100–200 GeV. The new mechanism is infrared enhanced by t-channel Wγ-fusion processes. This has important implications for experimental tests of the seesaw mechanism of neutrino masses and, in particular, for the ongoing heavy neutrino searches at the LHC. We find that the direct collider limits on the light-to-heavy neutrino mixing can be significantly improved when this new production channel is properly taken into account. The scope of this new mechanism can be equally well extended to other exotic searches at the LHC.
    Original languageEnglish
    Article number081801
    Number of pages5
    JournalPhysical Review Letters
    Issue number8
    Publication statusPublished - 24 Feb 2014


    • LHC Phenomenology
    • Majorana Neutrinos


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