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Same Sign versus Opposite Sign Dileptons as a Probe of Low Scale Seesaw Mechanisms

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arxiv 1709.06553 v3 pith:NW4RE33L submitted 2017-09-19 hep-ph hep-ex

Arindam Das , P. S. Bhupal Dev , Rabindra N. Mohapatra This is my paper · ORCID
classification hep-phhep-ex
keywords seesawsigncollidersdileptonsmechanismsmodeloppositeprobe
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abstract

We calculate the ratio $R_{\ell\ell}$ of same sign (SS) to opposite sign (OS) dileptons in type I and generalized inverse seesaw models and show that it can be anywhere between 0 and 1 depending on the detailed texture of the right-handed neutrino mass matrix. Measurement of $R_{\ell\ell}$ in hadron colliders can therefore provide a way to probe the nature of seesaw mechanism and also to distinguish between the two types of seesaw mechanisms. We work within the framework of left-right symmetric model as an example. We emphasize that coherence of the final states in the $W_R$ decay is crucial for this discussion and it requires the right-handed neutrinos to be highly degenerate. We isolate the range of parameters in the model where this effect is observable at the LHC and future colliders.

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Cited by 4 Pith papers

Reviewed papers in the Pith corpus that reference this work. Sorted by Pith novelty score. Full citation record

  1. Probing lepton flavor mixing in $W_R$ searches with machine learning at the LHC

    hep-ph 2026-06 unverdicted novelty 6.0 of 10

    DNN analysis of pp → WR → ℓNR → ℓℓjj at LHC Run 2 and HL-LHC improves exclusion limits on m_WR and m_NR for unmixed, maximal-mixing, and PMNS-like scenarios over cut-based methods and probes the |Ve1|–|Vμ1| plane.

  2. Loop-Level Lepton Flavor Violation and Diphoton Signals in the Minimal Left-Right Symmetric Model

    hep-ph 2025-12 conditional novelty 6.0 of 10

    Recasting axion limits onto the one-loop H3 couplings of the minimal left-right symmetric model excludes the right-handed scale up to 2×10^9 GeV and could eventually probe 6×10^11 GeV.

  3. Right-handed neutrino production through first-generation leptoquarks

    hep-ph 2024-12 conditional novelty 5.0 of 10

    At the HL-LHC, first-generation leptoquarks decaying to right-handed neutrinos are discovered most efficiently through indirect t-channel production, reaching leptoquark masses of roughly 3 to 10 TeV when the new coup...

  4. Leptonic CP asymmetry and heavy neutrino searches in seesaw scenario

    hep-ph 2026-06 unverdicted novelty 4.0 of 10

    Projects LHC and HL-LHC sensitivities to heavy neutrino mixing via dilepton channels in seesaw scenario, with dependence on R_ll and CP asymmetry.

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