First Probe of Sub-GeV Dark Matter Beyond the Cosmological Expectation with the COHERENT CsI Detector at the SNS

Akimov, D.; An, Peng; Awe, C.; Barbeau, PS; Becker, B. R.; Belov,; Bernardi, I.; Blackston, MA; Bock, C.; Bolozdynya, A.; Browning, Jim; Cabrera-Palmer, Belkis; Chernyak, D.; Conley, E.; Daughhetee, J.; Detwiler, J. A.; Ding, K.; Durand,; Efremenko, Y.; Elliott,; Fabris, L.; Febbraro, M.; Rosso, A. Gallo; Galindo‐Uribarri, A.; Green, Mark P.; Heath,; Hedges, S.; Hoang, D.; Hughes, M.; Johnson, T.; Хромов, А. В.; Konovalov, A. M.; Kozlova, E.; Kumpan, A.; Li, L; Link, J.; Liu, J; Mann, Kulwinder Singh; Markoff, D. M.; Mastroberti, J.; Mueller, P.E.; Newby, J.; Parno, DS; Penttilä, S.; Pershey, D.; Rapp, R.; Ray, H.; Raybern, J.; Razuvaeva, O.; Reyna, D.; Rich, G. C.; Ross, James A.; Rudik, D.; Runge, J.; Salvat, D.J.; Salyapongse, A. M.; Scholberg, K.; Shakirov, A.; Simakov, G.; Sinev, G.; Snow, W. M.; Sosnovstsev,; Suh, B.; Tayloe, R.; Tellez-Giron-Flores, K.; Tolstukhin, I.; Ujah, E.; Vanderwerp, J.; Varner, R. L.; Virtue, C. J.; Visser, G.; Wongjirad, T.; Yen, Y.-R.; Yoo, Jaeryong; Yu, C. H.; Zettlemoyer, J.

doi:10.48550/arxiv.2110.11453

Cited by 9 publications

(12 citation statements)

References 36 publications

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“…Dark matter particles produced at the SNS would also coherently scatter with nuclei inducing low-energy nuclear recoils similar to CEvNS [127,137]. Initial COHERENT data using a 14.6 kg, CsI[Na] scintillator detector placed leading constraints on sub-GeV dark matter [5] which will be improved with the next generation of COHERENT detectors.…”

Section: Accelerator-produced Dark Matter With Cevns Detectorsmentioning

confidence: 99%

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The COHERENT Experimental Program

Akimov¹,

Alawabdeh²,

An³

et al. 2022

Preprint

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The COHERENT experiment located in Neutrino Alley at the Spallation Neutron Source (SNS), Oak Ridge National Laboratory (ORNL), has made the world's first two measurements of coherent elastic neutrino-nucleus scattering (CEvNS), on CsI and argon, using neutrinos produced at the SNS. The COHERENT collaboration continues to pursue CEvNS measurements on various targets as well as additional studies of inelastic neutrino-nucleus interactions, searches for accelerator-produced dark matter (DM) and physics beyond the Standard Model, using the uniquely high-quality and high-intensity neutrino source available at the SNS. This white paper describes primarily COHERENT's ongoing and near-future program at the SNS First Target Station (FTS). Opportunities enabled by the SNS Second Target Station (STS) for the study of neutrino physics and development of novel detector technologies are elaborated in a separate white paper.

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Section: Accelerator-produced Dark Matter With Cevns Detectorsmentioning

confidence: 99%

“…• Beyond CEvNS, COHERENT can explore many other physics signals. These include DM-induced recoils [5] and inelastic neutrino-nucleus interactions [2] on several nuclear targets of particular interest for the core-collapse-supernova and solar-neutrino energy regime.…”

mentioning

confidence: 99%

The COHERENT Experimental Program

Akimov¹,

Alawabdeh²,

An³

et al. 2022

Preprint

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“…12 shows the constraint from Ref. (111) based on non-observation of an excess of prompt counts with the expected recoil spectrum for a DM model, for a specific model of scalar dark matter. This is the first constraint for a model of this type that goes beyond the cosmological expectation in the ∼25 MeV/c 2 mass range.…”

Section: Dark Matter Search Resultsmentioning

confidence: 98%

“…This is the first constraint for a model of this type that goes beyond the cosmological expectation in the ∼25 MeV/c 2 mass range. A range of other models can be similarly constrained (111).…”

Section: Dark Matter Search Resultsmentioning

confidence: 99%

COHERENT at the Spallation Neutron Source

Barbeau¹,

Efremenko²,

Scholberg³

2021

Preprint

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The Spallation Neutron Source (SNS) at Oak Ridge National Laboratory provides an intense, high-quality source of neutrinos from pion decay at rest. This source was recently used for the first measurements of coherent elastic neutrino-nucleus scattering (CEvNS) by the COHERENT collaboration, resulting in new constraints of beyond-thestandard-model physics. The SNS neutrino source will enable further CEvNS measurements, exploration of inelastic neutrino-nucleus interactions of particular relevance for understanding of supernova neutrinos, and searches for accelerator-produced sub-GeV dark matter. Taking advantage of this unique facility, COHERENT's suite of detectors in "Neutrino Alley" at the SNS is accumulating more data to address a broad physics program at the intersection of particle physics, nuclear physics, and astrophysics. This review describes COHERENT's first two CEvNS measurements, their interpretation, and the potential of a future physics program at the SNS.

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“…Constraints on the dark model with fermionic DM. At left, we show existing constraints from current bounds on invisible vector meson decays, as well as those from the beam dumps LSND[71,72], E137[73,74], MiniBooNE[75], and COHERENT[76], radiative pion decay at NA62[29], the missing energy experiment NA64[77,78], production in e + e − collisions at BaBar[79], and precision measurements of the Z 0 mass at LEP[80]. At right, we show the strongest projected 90% C.L.…”

mentioning

confidence: 92%

Probing Invisible Vector Meson Decays with NA64 and LDMX

Schuster,

Toro,

Zhou

2021

Preprint

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Electron beam fixed target experiments such as NA64 and LDMX use missing energy-momentum to detect the production of dark matter and other long-lived states. The most studied production mechanism is dark Bremsstrahlung through a vector mediator. In this work, we explore a complementary source of missing energy-momentum signals: Bremsstrahlung photons can convert to hard vector mesons in exclusive photoproduction processes, which then decay to dark matter or other invisible particles, such as neutrinos. We find that existing NA64 data can improve the leading constraints on invisible light vector meson decays, while a future run of LDMX could improve them by up to 5 orders of magnitude. For the examples of a dark photon and a U (1)B gauge boson mediator, accounting for meson decays substantially enhances these experiments' sensitivity, especially to thermal relic dark matter of mass mχ 0.1 GeV.

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First Probe of Sub-GeV Dark Matter Beyond the Cosmological Expectation with the COHERENT CsI Detector at the SNS

Cited by 9 publications

References 36 publications

The COHERENT Experimental Program

The COHERENT Experimental Program

COHERENT at the Spallation Neutron Source

Probing Invisible Vector Meson Decays with NA64 and LDMX

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