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

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arxiv 2110.11453 v2 pith:EKQBJ5C4 submitted 2021-10-21 hep-ex

D. Akimov , P. An , C. Awe , P. S. Barbeau , B. Becker , V. Belov , I. Bernardi , M. A. Blackston
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C. Bock A. Bolozdynya J. Browning B. Cabrera-Palmer D. Chernyak E. Conley J. Daughhetee J. Detwiler K. Ding M. R. Durand Y. Efremenko S. R. Elliott L. Fabris M. Febbraro A. Gallo Rosso A. Galindo-Uribarri M. P. Green M. R. Heath S. Hedges D. Hoang M. Hughes T. Johnson A. Khromov A. Konovalov E. Kozlova A. Kumpan L. Li J. M. Link J. Liu K. Mann D. M. Markoff J. Mastroberti P. E. Mueller J. Newby D. S. Parno S. I. Penttila D. Pershey R. Rapp J. Raybern O. Razuvaeva D. Reyna G. C. Rich J. Ross D. Rudik J. Runge D. J. Salvat A. M. Salyapongse J. Sander K. Scholberg A. Shakirov G. Simakov G. Sinev W. M. Snow V. Sosnovstsev B. Suh R. Tayloe K. Tellez-Giron-Flores I. Tolstukhin E. Ujah J. Vanderwerp R. L. Varner C. J. Virtue G. Visser T. Wongjirad Y.-R. Yen J. Yoo C.-H. Yu J. Zettlemoyer
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classification hep-ex
keywords coherentdarkdark-matterdetectormatterscalarsensitivesensitivity
verification ladder T0 review T1 audit T2 compute T3 formal

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abstract

The COHERENT collaboration searched for scalar dark matter particles produced at the Spallation Neutron Source with masses between 1 and 220~MeV/c$^2$ using a CsI[Na] scintillation detector sensitive to nuclear recoils above 9~keV$_\text{nr}$. No evidence for dark matter is found and we thus place limits on allowed parameter space. With this low-threshold detector, we are sensitive to coherent elastic scattering between dark matter and nuclei. The cross section for this process is orders of magnitude higher than for other processes historically used for accelerator-based direct-detection searches so that our small, 14.6~kg detector significantly improves on past constraints. At peak sensitivity, we reject the flux consistent with the cosmologically observed dark-matter concentration for all coupling constants $\alpha_D<0.64$, assuming a scalar dark-matter particle. We also calculate the sensitivity of future COHERENT detectors to dark-matter signals which will ambitiously test multiple dark-matter spin scenarios.

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Cited by 2 Pith papers

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  1. Proof of principle for a light dark matter search with low-energy positron beams at NA64

    hep-ex 2025-02 accept novelty 6.0 of 10

    A 70 GeV positron-beam missing-energy search at NA64 found zero signal events and set new dark photon limits, demonstrating the feasibility of a future low-energy positron program.

  2. DarkSHINE Baseline Design Report: Physics Prospects and Detector Technologies

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    The DarkSHINE baseline design projects 90% C.L. sensitivity to dark photon kinetic mixing epsilon^2 as low as ~1e-12 for masses around 1-100 MeV with 3e14 electrons on target.

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