Novel Way to Search for Light Dark Matter in Lepton Beam-Dump Experiments

Marsicano, L.; Battaglieri, M.; Bondí, M.; Carvajal, C. D. R.; Celentano, A.; Napoli, M. De; Vita, R. De; Nardi, Enrico; Raggi, M.; Valente, P.

doi:10.1103/physrevlett.121.041802

Cited by 65 publications

(62 citation statements)

References 29 publications

(31 reference statements)

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“…The NA64 Collaboration has recently published very strong limits for DP masses below 150 MeV [45] via a missing energy analysis. For large α D , experiments looking at electron-DM scattering such as LSND [46,47], MiniBooNE [20,21], E137 [48][49][50], and NOνA [25] and capable of competing with NA64 for dark matter masses below few tens of MeV. (ii) Direct detection: In the region where the χ relic abundance corresponds to the observed DM abundance and for large values of α D , CRESST-II and III place strong constraints on m χ > 500 MeV [51][52][53][54].…”

Section: Vector Portalmentioning

confidence: 99%

Hunt for sub-GeV dark matter at neutrino facilities: A survey of past and present experiments

2020

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We survey the sensitivity of past and present neutrino experiments to MeV-GeV scale vector portal dark matter and find that these experiments possess novel sensitivity that has not yet fully explored. Taking α D ¼ 0.1 and a dark photon to dark matter mass ratio of three, the combined recast of previous analyses of Big European Bubble Chamber and a projection of NOνA's sensitivity are found to rule out the scalar thermal target for dark matter masses between 10 and 100 MeV with existing data, while CHARM-II and MINERνA place somewhat weaker limits. These limits can be improved by off-axis searches using the NuMI beam line and the MicroBooNE, MiniBooNE, or ICARUS detectors and can even begin to probe the Majorana thermal target. We conclude that past and present neutrino facilities can search for light dark matter concurrently with their neutrino program and reach a competitive sensitivity to proposed future experiments.

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Section: Vector Portalmentioning

confidence: 99%

Hunt for sub-GeV dark matter at neutrino facilities: A survey of past and present experiments

2020

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“…The mass splitting between Dirac fermion component states δ and DM mass M χ are indicated. Constraints on dark photons are shown [60][61][62][63][64][65] (gray) alongside CRESST DM-nucleon scattering bounds [58] (blue), and SuperCDMS Ge/Si projections [66] (dotted).…”

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confidence: 99%

Electric But Not Eclectic: Thermal Relic Dark Matter for the XENON1T Excess

Bramante

Song

2020

Phys. Rev. Lett.

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The identity of dark matter is being sought with increasingly sensitive and voluminous underground detectors. Recently the XENON1T Collaboration reported excess electronic recoil events, with most of these having recoil energies around 1-30 keV. We show that a straightforward model of inelastic dark matter produced via early Universe thermal freeze-out annihilation can account for the XENON1T excess. Remarkably, this dark matter model consists of a few simple elements: sub-GeV mass Dirac fermion dark matter coupled to a lighter dark photon kinetically mixed with the standard model photon. A scalar field charged under the dark U(1) gauge symmetry can provide a mass for the dark photon and splits the Dirac fermion component state masses by a few keV, which survive in equal abundance and interact inelastically with electrons and nuclei.

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“…Such a beam intensity will allow BDX to collect ∼10 22 electron-on-target (EOT) in 285 days, in full parasitic runs. The interaction between the energetic electrons and the atoms of the dump leads to the production of Dark Photons through a Bremsstrahlung-like radiative process (A − strahlung, Figure 1, left) [10] and e + e − annihilations [13,14]. The A could then decay into forward-boosted DM particles (χ) (Figure 1, left).…”

Section: Bdx Overviewmentioning

confidence: 99%

Production and Detection of Light Dark Matter at Jefferson Lab: The BDX Experiment

Napoli

2019

Universe

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The Beam Dump eXperiment (BDX) is a an electron-beam thick-target experiment aimed to investigate the existence of light Dark Matter particles in the MeV-GeV mass region at Jefferson Lab. The experiment will make use of a 10.6 GeV high-intensity electron-beam impinging on the Hall-A beam-dump to produce the Dark Matter particles ( χ ) through the Dark Photon portal. The BDX detector located at ∼20 m from the dump consists of two main components: an electromagnetic calorimeter to detect the signals produced by the χ -electron scattering and a veto system to reject background. The expected signature of the DM (Dark Matter) interaction in the Ecal (Electromagnetic calorimeter) is a ∼GeV electromagnetic shower paired with a null activity in the surrounding active veto counters. Collecting 10 22 electrons on target in 285 days of parasitic run at 65 μ A of beam current, and with an expected background of O(5) counts, in the case of a null discovery, BDX will be able to lower the exclusion limits by one to two orders of magnitude in the parameter space of dark-matter coupling versus mass. This paper describes the experiment and presents a summary of the most significant results achieved thus far, which led to the recent approval of the experiment by JLab-PAC46.

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Novel Way to Search for Light Dark Matter in Lepton Beam-Dump Experiments

Cited by 65 publications

References 29 publications

Hunt for sub-GeV dark matter at neutrino facilities: A survey of past and present experiments

Hunt for sub-GeV dark matter at neutrino facilities: A survey of past and present experiments

Electric But Not Eclectic: Thermal Relic Dark Matter for the XENON1T Excess

Production and Detection of Light Dark Matter at Jefferson Lab: The BDX Experiment

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