{"record":{"author":{"account_ref":null,"orcid":null},"builds_on":[],"content_schema":"pubphys.content.revision/1","content_sha256":"3063a54877cd7a999c551c31815562bc794b2acf3d6c0689b982084cf0032feb","created":"2026-10-15T23:43:22Z","files":[],"origin":{"assisted_by":[],"kind":"seed"},"parents":["356db6ebc8b1a14ae03141425f6fed3ace79510edfaaa68e3c88eb222ee124ae","ce59fb6cd812fc05906d0c60a71c75ea22bc686bcf38e7c3ef7010834d98ee7b"],"salt":"ff9589398b6edaaed037fdd228d05f50908a128962a878ab84f59b5086b20c13","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":"2","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 $5.2 \\times 10^{6}\\ \\mathrm{cm}^{-2}\\ \\mathrm{s}^{-1}$. An answer is a measurement with 10 percent precision and the resulting bound on nonstandard neutrino-quark couplings or light mediators.","problem_ref":"356db6ebc8b1a14ae03141425f6fed3ace79510edfaaa68e3c88eb222ee124ae","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":null},"attested":{"attestation":{"batch":null,"client_id":null,"id_token_sha256":null,"kind":"platform"},"record_hash":"9eae2794e1113eb2c0ce59adb9417cbf56dfc19a6fda8cb7466850bbf5732682","schema":"pubphys.attested/1"},"envelope":{"attested_hash":"c34b40bc8401f929945dd7dd90b0467a575187605b1ce91b48f3672a427b3ef9","platform_signature":{"key_id":"c6afc19b31429869751f06879c75cd64ea92654423d15b44be775bf1310a60da","sig":"udGSaEuUXe6Vab7sIs60RcuPA1vwyl8EARVZL-AU6uBkzAnFQu14-_0W29x0Xz2tHxc8R6lGn1DMkteXHoHpBg"},"schema":"pubphys.envelope/1"},"record_hash":"9eae2794e1113eb2c0ce59adb9417cbf56dfc19a6fda8cb7466850bbf5732682","leaf_index":3368}