Probing Sub-GeV Dark Matter with Conventional Detectors

Chris Kouvaris, Josef Pradler

Publikation: Bidrag til tidsskriftLetterForskningpeer review

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Resumé

The direct detection of dark matter particles with mass below the GeV scale is hampered by soft nuclear recoil energies and finite detector thresholds. For a given maximum relative velocity, the kinematics of elastic dark matter nucleus scattering sets a principal limit on detectability. Here, we propose to bypass the kinematic limitations by considering the inelastic channel of photon emission from bremsstrahlung in the nuclear recoil. Our proposed method allows us to set the first limits on dark matter below 500 MeV in the plane of dark matter mass and cross section with nucleons. In situations where a dark-matter-electron coupling is suppressed, bremsstrahlung may constitute the only path to probe low-mass dark matter awaiting new detector technologies with lowered recoil energy thresholds.

OriginalsprogEngelsk
Artikelnummer031803
TidsskriftPhysical Review Letters
Vol/bind118
Udgave nummer3
Sider (fra-til)031803-1-031803-5
Antal sider5
ISSN0031-9007
DOI
StatusUdgivet - 2017

Fingeraftryk

dark matter
detectors
bremsstrahlung
kinematics
bypasses
nucleons
nuclei
thresholds
energy
probes
cross sections
photons
scattering
electrons

Citer dette

Kouvaris, Chris ; Pradler, Josef. / Probing Sub-GeV Dark Matter with Conventional Detectors. I: Physical Review Letters. 2017 ; Bind 118, Nr. 3. s. 031803-1-031803-5.
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abstract = "The direct detection of dark matter particles with mass below the GeV scale is hampered by soft nuclear recoil energies and finite detector thresholds. For a given maximum relative velocity, the kinematics of elastic dark matter nucleus scattering sets a principal limit on detectability. Here, we propose to bypass the kinematic limitations by considering the inelastic channel of photon emission from bremsstrahlung in the nuclear recoil. Our proposed method allows us to set the first limits on dark matter below 500 MeV in the plane of dark matter mass and cross section with nucleons. In situations where a dark-matter-electron coupling is suppressed, bremsstrahlung may constitute the only path to probe low-mass dark matter awaiting new detector technologies with lowered recoil energy thresholds.",
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Probing Sub-GeV Dark Matter with Conventional Detectors. / Kouvaris, Chris; Pradler, Josef.

I: Physical Review Letters, Bind 118, Nr. 3, 031803, 2017, s. 031803-1-031803-5.

Publikation: Bidrag til tidsskriftLetterForskningpeer review

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AU - Pradler, Josef

PY - 2017

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N2 - The direct detection of dark matter particles with mass below the GeV scale is hampered by soft nuclear recoil energies and finite detector thresholds. For a given maximum relative velocity, the kinematics of elastic dark matter nucleus scattering sets a principal limit on detectability. Here, we propose to bypass the kinematic limitations by considering the inelastic channel of photon emission from bremsstrahlung in the nuclear recoil. Our proposed method allows us to set the first limits on dark matter below 500 MeV in the plane of dark matter mass and cross section with nucleons. In situations where a dark-matter-electron coupling is suppressed, bremsstrahlung may constitute the only path to probe low-mass dark matter awaiting new detector technologies with lowered recoil energy thresholds.

AB - The direct detection of dark matter particles with mass below the GeV scale is hampered by soft nuclear recoil energies and finite detector thresholds. For a given maximum relative velocity, the kinematics of elastic dark matter nucleus scattering sets a principal limit on detectability. Here, we propose to bypass the kinematic limitations by considering the inelastic channel of photon emission from bremsstrahlung in the nuclear recoil. Our proposed method allows us to set the first limits on dark matter below 500 MeV in the plane of dark matter mass and cross section with nucleons. In situations where a dark-matter-electron coupling is suppressed, bremsstrahlung may constitute the only path to probe low-mass dark matter awaiting new detector technologies with lowered recoil energy thresholds.

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DO - 10.1103/PhysRevLett.118.031803

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