{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"7feff31eea3933b44630b4bd7012e9b888f65fec17a881f4f827162c15596e03","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b","fd602f9520e23e8ccda77f556d7530d9cbd43adee92892c80a35603985f614ba"],"salt":"0df41bdf20c9fdab1df296c6b9abd0398fbda50deebdedc397bedf8908c16bff","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"yes-no","assisted_by":[],"external_id":"hep.baryogenesis.low-scale-leptogenesis","kind":"well-posed","literature_status":"open","n":"2","parents":[],"plain":"In one scenario, heavy partners of neutrinos with masses near a few proton masses created the asymmetry. Such particles could be made at accelerators and seen decaying.","posed_since":"1998","precise":"Determine whether heavy neutral leptons N with $M_N \\sim 0.1\\ \\text{to}\\ 100\\ \\mathrm{GeV}$ and active-sterile mixing $U^2$ in the range where resonant or oscillation-based (ARS) leptogenesis gives $\\eta_B \\sim 6 \\times 10^{-10}$ exist. An answer is a discovery with measured $M_N$, $U_e^2$, $U_{\\mu}^2$, $U_{\\tau}^2$ consistent with that region, or its exclusion.","problem_ref":"fd602f9520e23e8ccda77f556d7530d9cbd43adee92892c80a35603985f614ba","references":"","settled_by":"Beam-dump and collider searches (SHiP, displaced-vertex searches at LHC, FCC-ee at the Z pole) covering the leptogenesis region.","status_note":"SHiP was approved at CERN in 2024 for operation in the 2030s.","title":"Do GeV-scale heavy neutral leptons realize low-scale leptogenesis?","topic_ref":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"02cd2b437cc3cccbcbba90bff2f8acbc192eb58e5c5489c14c1cfbf8310f3146","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"ca8c1387ea3633069349e9b08f3579801773ccee80fb334627555d6d429b8422","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"MOeDd-F4FmrF0cy9Msrc_NekuT3ctkLwgtQMid-h9ZvIfy-05sf4s3_TAfFmJ2vJDQEd6cIqG_v6Tw8ve7BbAw"},"schema":"pubphys.envelope/1"},"record_hash":"02cd2b437cc3cccbcbba90bff2f8acbc192eb58e5c5489c14c1cfbf8310f3146","leaf_index":3324}