20.500.12556/DiRROS-31121 Long-lived left-right signals at the FCC-ee We give an extensive discussion of the displaced signals of heavy Majorana neutrino production at future electron-positron colliders operating at various proposed energies in the context of the Left-Right symmetric model. A comprehensive collection of channels is taken into account, ranging from those featuring W and WR mediation to those induced by scalar mixing and gauge/scalar boson fusion, with connections to the mechanism of neutrino mass origin. The emerging signatures feature possibly multiple displaced heavy neutrinos that are in some cases accompanied by prompt activity and forward leptons. We derive the corresponding total production rates and differential distributions, which allow us to differentiate the channels and have analytical estimates of the signal yield. We then develop realistic estimates of the selection efficiencies using a dedicated vertexing algorithm which establishes the displaced decay positions and supplies a reliable proxy for reconstructing the full four-momenta of long-lived particles. This allows us to determine the realistic reaches in the parameter space of the Left-Right symmetric model across the various channels, and we show that these can strongly surpass the LHC ones, demonstrating that future lepton colliders are sensitive to left-right symmetry breaking scales in the deep multi-TeV regime. Majorana neutrinos true false true Published for Sissa by Springer Italija Angleški jezik Ni določen © The Authors. Neznano 2026-07-13 14:48:47 2026-07-13 14:48:48 2026-07-14 03:47:28 0000-00-00 00:00:00 2026 0 0 Nasl. z nasl. zaslona; Soavtorji: Jonathan Kriewald, Miha Nemevšek, Fabrizio Nesti; Opis vira z dne 13. 7. 2025; str. 1-58 Vol. 2026, article no. 3 1 Jul. 2026 0000-00-00 Zaloznikova Objavljeno NiDoloceno 2026-02-20 2026-04-11 2026-07-01 539.1 1029-8479 10.1007/JHEP07(2026)003 284591363 https://link.springer.com/article/10.1007/JHEP07(2026)003 1 33905602-7eb9-11f1-b063-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=47964 RAZ_Fuks_Benjamin_2026.pdf RAZ_Fuks_Benjamin_2026.pdf 1 0ED3EE5F430F2FECBE9F8E43A50863A3 2e93d5b41ebff2ba90a6fe822e4b5105c81d8d48eacd62078dc99ae8dc795299 a7c3cc79-7eb9-11f1-b063-001a4af901a5 https://dirros.openscience.si/Dokument.php?lang=slv&id=47965 Institut Jožef Stefan 0 0 0