期刊
JOURNAL OF HIGH ENERGY PHYSICS
卷 -, 期 6, 页码 -出版社
SPRINGER
DOI: 10.1007/JHEP06(2019)141
关键词
Beyond Standard Model; Neutrino Physics; Solar and Atmospheric Neutrinos
资金
- U.S. DOE [de-sc0010504]
- grant Unraveling new physics in the high-intensity and high-energy frontiers, Fondecyt [1171136]
- Hundred-Talent Program of Sun Yat-Sen University
The standard model coherent elastic neutrino-nucleus scattering (CENS) cross section is subject to nuclear form factor uncertainties, mainly driven by the root-mean-square radius of the neutron density distribution. Motivated by COHERENT phases I-III and future multi-ton direct detection dark matter searches, we evaluate these uncertainties in cesium iodide, germanium, xenon and argon detectors. We find that the uncertainties become relevant for momentum transfers q 20 MeV and are essentially independent of the form factor parameterization. Consequently, form factor uncertainties are not important for CENS induced by reactor or solar neutrinos. Taking into account these uncertainties, we then evaluate their impact on measurements of CENS at COHERENT, the diffuse supernova background (DSNB) neutrinos and sub-GeV atmospheric neutrinos. We also calculate the relative uncertainties in the number of COHERENT events for different nuclei as a function of recoil energy. For DSNB and atmospheric neutrinos, event rates at a liquid argon detector can be uncertain to more than 5%. Finally, we consider the impact of form factor uncertainties on searches for nonstandard neutrino interactions, sterile neutrinos and neutrino generalized interactions. We point out that studies of new physics using CENS data are affected by neutron form factor uncertainties, which if not properly taken into account may lead to the misidentification of new physics signals. The uncertainties quantified here are also relevant for dark matter direct detection searches.
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