Year: 2026
Type: preprint
Abstract: We present refined predictions of the geoneutrino flux for the 500-tonne Jinping Neutrino Experiment (JNE). We construct a local crustal model with a resolution of \(0.2^\circ\times0.2^\circ\) based on the SWChinaCVM-2.0 seismic velocity model and integrate it with CRUST1.0 to establish our reference model. For comparison, we also calculate the geoneutrino flux using ECM1 and CRUST1.0 as standalone global crustal models. Assuming an energy scale of 500~p.e./MeV and an exposure of 500~t$\times$1500~days, we predict the inverse beta decay event spectrum, including both the geoneutrino signal and the reactor antineutrino background. The distinct spectral shapes of the $^{238}$U, $^{232}$Th, and reactor antineutrino components allow their respective contributions to be obtained through spectral fitting. These predictions provide inputs for the JNE data analysis, particularly for extracting the mantle geoneutrino signal and testing competing bulk silicate Earth models.
Source: arXiv (Cornell University)
Authors: Meng, Kaikai, Zhang, Yang
Institution: Shandong University
Language: English
Topic: Neutrino Physics Research
Subfield: Nuclear and High Energy Physics
Field: Physics and Astronomy
Domain: Physical Sciences
Open Access status: green
OpenAlex ID: W7223702609