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Search for Solar B 8 Neutrinos in the PandaX-4T Experiment Using Neutrino-Nucleus Coherent Scattering

  • (PandaX Collaboration)
  • Shanghai Jiao Tong University
  • Sun Yat-Sen University
  • Yalong River Hydropower Development Company, Ltd.
  • Nankai University
  • Fudan University
  • Peking University
  • Zhengzhou University
  • University of Shanghai for Science and Technology
  • University of Maryland, College Park
  • University of Science and Technology of China
  • University of Science and Technology of China
  • Shandong University
  • Beihang University
  • Shanghai Jiao Tong University

Research output: Contribution to journalArticlepeer-review

Abstract

A search for interactions from solar B8 neutrinos elastically scattering off xenon nuclei using PandaX-4T commissioning data is reported. The energy threshold of this search is further lowered compared with the previous search for dark matter, with various techniques utilized to suppress the background that emerges from data with the lowered threshold. A blind analysis is performed on the data with an effective exposure of 0.48 tonne year, and no significant excess of events is observed. Among the results obtained using the neutrino-nucleus coherent scattering, our results give the best constraint on the solar B8 neutrino flux. We further provide a more stringent limit on the cross section between dark matter and nucleon in the mass range from 3 to 9 GeV/c2.

Original languageEnglish
Article number021802
JournalPhysical Review Letters
Volume130
Issue number2
DOIs
StatePublished - 13 Jan 2023

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