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Search for Light Dark Matter Interactions Enhanced by the Migdal Effect or Bremsstrahlung in XENON1T
- Source :
- BASE-Bielefeld Academic Search Engine, Phys.Rev.Lett., Phys.Rev.Lett., 2019, 123 (24), pp.241803. ⟨10.1103/PhysRevLett.123.241803⟩, Physical Review Letters, 123(24):241803. American Physical Society, Physical Review Letters
- Publication Year :
- 2019
-
Abstract
- Direct dark matter detection experiments based on a liquid xenon target are leading the search for dark matter particles with masses above ∼5 GeV/c2, but have limited sensitivity to lighter masses because of the small momentum transfer in dark matter-nucleus elastic scattering. However, there is an irreducible contribution from inelastic processes accompanying the elastic scattering, which leads to the excitation and ionization of the recoiling atom (the Migdal effect) or the emission of a bremsstrahlung photon. In this Letter, we report on a probe of low-mass dark matter with masses down to about 85 MeV/c2 by looking for electronic recoils induced by the Migdal effect and bremsstrahlung using data from the XENON1T experiment. Besides the approach of detecting both scintillation and ionization signals, we exploit an approach that uses ionization signals only, which allows for a lower detection threshold. This analysis significantly enhances the sensitivity of XENON1T to light dark matter previously beyond its reach.
- Subjects :
- xenon: target
Physics - Instrumentation and Detectors
dark matter: interaction
elastic scattering
General Physics and Astronomy
01 natural sciences
High Energy Physics - Experiment
High Energy Physics - Experiment (hep-ex)
Xenon
Ionization
excited state
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
Nuclear Experiment
Light dark matter
Elastic scattering
Physics
xenon: liquid
atom
momentum transfer
Momentum transfer
Bremsstrahlung
Instrumentation and Detectors (physics.ins-det)
photon: bremsstrahlung
S030DN5
Weakly interacting massive particles
Excited state
Astrophysics - Cosmology and Nongalactic Astrophysics
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Dark matter
Light Dark Matter Direct search Liquid Xenon TPC
FOS: Physical sciences
S030DI5
chemistry.chemical_element
Nuclear physics
Particle dark matter
recoil
ionization
0103 physical sciences
[PHYS.PHYS.PHYS-INS-DET]Physics [physics]/Physics [physics]/Instrumentation and Detectors [physics.ins-det]
010306 general physics
scintillation counter
S030DP5
010308 nuclear & particles physics
down: mass
sensitivity
Dark matter, Particle dark matter, Weakly interacting massive particles
Automatic Keywords
chemistry
Elementary Particles and Fields
bremsstrahlung: emission
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Subjects
Details
- ISSN :
- 10797114 and 00319007
- Volume :
- 123
- Issue :
- 24
- Database :
- OpenAIRE
- Journal :
- Physical review letters
- Accession number :
- edsair.doi.dedup.....64d48c579e580875f41c21dcd2e9b62a