Does the measured solar 8B CEvNS rate in xenon match the Standard Model? · revision history

Revision 2

Accepted · core change · record

Changes against revision 1:

Title
Does the measured solar 8B CEvNS rate in xenon match the Standard Model?
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.
Precise · changed · core
Revision 1: 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.
Revision 2: 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.
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.
Kind
well-posed
Answer type
value
References
(empty)
Literature status
open
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.
Posed since
(empty)

Decisions