Reconstructing a Heavy Neutral Lepton at the LHC
Abstract Heavy lepton singlets N slightly mixed with a standard neutrino ν ℓ are usually searched for at the LHC in the trilepton plus p T miss $$ {p}_{\textrm{T}}^{\textrm{miss}} $$ channel: pp → W + → ℓ + N with N → ℓ − W + → ℓ − ℓ′ + ν. We show that, although the longitudinal momentum of the fina...
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| Main Authors: | , , |
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| Format: | Article |
| Language: | English |
| Published: |
SpringerOpen
2025-06-01
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| Series: | Journal of High Energy Physics |
| Subjects: | |
| Online Access: | https://doi.org/10.1007/JHEP06(2025)129 |
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| Summary: | Abstract Heavy lepton singlets N slightly mixed with a standard neutrino ν ℓ are usually searched for at the LHC in the trilepton plus p T miss $$ {p}_{\textrm{T}}^{\textrm{miss}} $$ channel: pp → W + → ℓ + N with N → ℓ − W + → ℓ − ℓ′ + ν. We show that, although the longitudinal momentum of the final ν escapes detection, the mass of the heavy lepton can be reconstructed. While this possibility has not been considered in recent LHC searches, we find that the search for a mass peak could improve the current collider bounds on the mixing |V ℓN |2 for any mass m N ≥ M W . |
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| ISSN: | 1029-8479 |