Journal
PHYSICAL REVIEW D
Volume 104, Issue 1, Pages -Publisher
AMER PHYSICAL SOC
DOI: 10.1103/PhysRevD.104.015005
Keywords
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Funding
- National Natural Science Foundation of China [11905299]
- Guangdong Basic and Applied Basic Research Foundation [2020A1515011479]
- U.S. Department of Energy
- PITT PACC
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Recent measurements of the germanium quenching factor deviate significantly from the predictions of the standard Lindhard model for nuclear recoil energies below a keV. This departure may be explained by the Migdal effect in neutron scattering on germanium. Researchers demonstrate that the Migdal effect on the quenching factor can mimic the signal of a light Z' or light scalar mediator in coherent elastic neutrino-nucleus scattering experiments with reactor antineutrinos. It is important to precisely measure the quenching factor of nuclei with low recoil energy thresholds close to threshold to avoid confusion and to aid in experimental searches of light dark matter.
Recent measurements of the germanium quenching factor deviate significantly from the predictions of the standard Lindhard model for nuclear recoil energies below a keV. This departure may be explained by the Migdal effect in neutron scattering on germanium. We show that the Migdal effect on the quenching factor can mimic the signal of a light Z' or light scalar mediator in coherent elastic neutrino-nucleus scattering experiments with reactor antineutrinos. It is imperative that the quenching factor of nuclei with low recoil energy thresholds be precisely measured close to threshold to avoid such confusion. This will also help in experimental searches of light dark matter.
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