{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"17adff0bdab612d6f8b421f06be959979a29f7b7fa58dd0c59320b38c3838bb9","created":"2026-10-03T07:18:05Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["5475cf5dc5b1a72283d26dc95dc6e00d7ea4e00096a7c6492e409a1816eeb011"],"salt":"ac24d54ec424c0b785b4e23a3f24061e700527fbb73149d82ff87e85e33c53d4","schema":"pubphys.record/2","site":"pubphys.com","target":null,"type":"revision"},"content":{"answer_type":"value","assisted_by":[],"external_id":"hep.neutrino-fog.8b-cevns-rate","kind":"well-posed","literature_status":"open","n":"1","parents":[],"plain":"Xenon dark matter detectors have begun to see solar neutrinos gently bumping whole xenon nuclei, a process called coherent scattering. The question is whether the measured rate equals the Standard Model prediction or hints at new neutrino interactions.","posed_since":"","precise":"Coherent elastic neutrino-nucleus scattering (CEvNS) of solar 8B neutrinos on Xe produces nuclear recoils below a few keV. The quantity is the measured 8B flux (or CEvNS rate) inferred from xenon data, compared with the SM cross section and the solar-model and SNO flux of about $5.2e6\\ \\mathrm{cm}^{-2}\\ \\mathrm{s}^{-1}$. An answer is a measurement with 10 percent precision and the resulting bound on nonstandard neutrino-quark couplings or light mediators.","problem_ref":null,"references":"","settled_by":"A xenon (or argon) detector measurement of the 8B CEvNS rate with low enough threshold and calibrated nuclear-recoil response to reach about 10 percent uncertainty.","status_note":"XENONnT ($2.73\\sigma$) and PandaX-4T ($2.64\\sigma$) reported evidence in 2024 (Phys. Rev. Lett. 133, 191002 and 191001); in 2026 LZ reported $4.5\\sigma$ (Phys. Rev. Lett. 137, 091806) and XENONnT $3.3\\sigma$ with flux $(5 +3 -2)e6\\ \\mathrm{cm}^{-2}\\ \\mathrm{s}^{-1}$ (Phys. Rev. Lett. 137, 091807); flux uncertainties remain about 50 percent.","title":"Does the measured solar 8B CEvNS rate in xenon match the Standard Model?","topic_ref":"8aa34dbf8fe622dfe44455a4a52ccd521c5275a918d302f3967b566a3c2ae8e9"},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"356db6ebc8b1a14ae03141425f6fed3ace79510edfaaa68e3c88eb222ee124ae","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"68f4cf4e68fa0c5399f40f88dc77f3477c5232a776be982c6af57a2f7c572a5d","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"oxsWo6IVdpVFsvcQabNJ6lAg0rnJDsk1vLr7g3o-oh1ID70JUQV89GED06l4fDdOaQl2wL9OK0b8QKmx6C_vDQ"},"schema":"pubphys.envelope/1"},"record_hash":"356db6ebc8b1a14ae03141425f6fed3ace79510edfaaa68e3c88eb222ee124ae","leaf_index":1566}