New Production Mechanism for Heavy Neutrinos at the LHC

2013/08/31 by P. S. Bhupal Dev, Apostolos Pilaftsis, Unki Yang +1 · 2 citations
Physics and Astronomy · #High-Energy Particle Collisions Research #Large Hadron Collider #Mechanism (biology) #Neutrino #Neutrino Physics Research #Neutrino oscillation #Nuclear physics #Particle physics #Particle physics theoretical and experimental studies #Physics #Production (economics) #Seesaw mechanism #Sterile neutrino #hep-ex #hep-ph

paper · pdf · doi:10.1103/physrevlett.112.081801

published as Phys. Rev. Lett. 112, 081801 (2014) · 5 pages, 4 figures; version accepted by Phys. Rev. Lett

arxiv created 2014/01/28 · openalex publication_date 2014/02/24 · arxiv updated 2014/03/05 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/05

Abstract

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 W\ensuremathγ-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.

Citations

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• NEUTRINO-LESS DOUBLE BETA DECAY AND PARTICLE PHYSICS
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Cited by

• Search for heavy neutral leptons in final states with electrons, muons, and hadronically decaying tau leptons in proton-proton collisions at √(s) = 13 TeV
• Observable lepton number violation with predominantly Dirac nature of active neutrinos