Low-energy electronic recoil in xenon detectors by solar neutrinos
| Autor: | C.-P. Liu, Hsin-Chang Chi, Jiunn-Wei Chen, Chih-Pan Wu |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2017 |
| Předmět: |
Free electron model
Nuclear and High Energy Physics Physics - Instrumentation and Detectors Nuclear Theory Physics::Instrumentation and Detectors Solar neutrino chemistry.chemical_element FOS: Physical sciences Photoionization 01 natural sciences High Energy Physics - Experiment Nuclear physics Nuclear Theory (nucl-th) High Energy Physics - Experiment (hep-ex) Xenon Recoil High Energy Physics - Phenomenology (hep-ph) WIMP 0103 physical sciences Physics::Atomic Physics Nuclear Experiment (nucl-ex) 010306 general physics Nuclear Experiment Physics Standard solar model 010308 nuclear & particles physics Instrumentation and Detectors (physics.ins-det) lcsh:QC1-999 High Energy Physics - Phenomenology chemistry High Energy Physics::Experiment Neutrino lcsh:Physics |
| Zdroj: | Physics Letters B, Vol 774, Iss C, Pp 656-661 (2017) Physics Letters B |
| ISSN: | 1873-2445 0370-2693 |
| Popis: | Low-energy electronic recoil caused by solar neutrinos in multi-ton xenon detectors is an important subject not only because it is a source of the irreducible background for direct searches of weakly-interacting massive particles (WIMPs), but also because it provides a viable way to measure the solar $pp$ and $^{7}\textrm{Be}$ neutrinos at the precision level of current standard solar model predictions. In this work we perform $\textit{ab initio}$ many-body calculations for the structure, photoionization, and neutrino-ionization of xenon. It is found that the atomic binding effect yields a sizable suppression to the neutrino-electron scattering cross section at low recoil energies. Compared with the previous calculation based on the free electron picture, our calculated event rate of electronic recoil in the same detector configuration is reduced by about $25\%$. We present in this paper the electronic recoil rate spectrum in the energy window of 100 eV - 30 keV with the standard per ton per year normalization for xenon detectors, and discuss its implication for low energy solar neutrino detection (as the signal) and WIMP search (as a source of background). Comment: 12 pages, 3 figures |
| Databáze: | OpenAIRE |
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