@article{akimov_an_awe_barbeau_becker_belov_bernardi_blackston_bock_bolozdynya_et al._2023, title={First Probe of Sub-GeV Dark Matter beyond the Cosmological Expectation with the COHERENT CsI Detector at the SNS}, volume={130}, ISSN={["1079-7114"]}, DOI={10.1103/PhysRevLett.130.051803}, abstractNote={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_{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 α_{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.}, number={5}, journal={PHYSICAL REVIEW LETTERS}, author={Akimov, D. and An, P. and Awe, C. and Barbeau, P. S. and Becker, B. and Belov, V. and Bernardi, I. and Blackston, M. A. and Bock, C. and Bolozdynya, A. and et al.}, year={2023}, month={Feb} }
 @article{an_awe_barbeau_becker_belov_bernardi_bock_bolozdynya_bouabid_brown_et al._2023, title={Measurement of Electron-Neutrino Charged-Current Cross Sections on <SUP>127</SUP>I with the COHERENT NaIνE Detector}, volume={131}, ISSN={["1079-7114"]}, DOI={10.1103/PhysRevLett.131.221801}, abstractNote={Using an 185-kg NaI[Tl] array, COHERENT has measured the inclusive electron-neutrino charged-current cross section on ^{127}I with pion decay-at-rest neutrinos produced by the Spallation Neutron Source at Oak Ridge National Laboratory. Iodine is one the heaviest targets for which low-energy (≤50  MeV) inelastic neutrino-nucleus processes have been measured, and this is the first measurement of its inclusive cross section. After a five-year detector exposure, COHERENT reports a flux-averaged cross section for electron neutrinos of 9.2_{-1.8}^{+2.1}×10^{-40}  cm^{2}. This corresponds to a value that is ∼41% lower than predicted using the MARLEY event generator with a measured Gamow-Teller strength distribution. In addition, the observed visible spectrum from charged-current scattering on ^{127}I has been measured between 10 and 55 MeV, and the exclusive zero-neutron and one-or-more-neutron emission cross sections are measured to be 5.2_{-3.1}^{+3.4}×10^{-40} and 2.2_{-0.5}^{+0.4}×10^{-40}  cm^{2}, respectively.}, number={22}, journal={PHYSICAL REVIEW LETTERS}, author={An, P. and Awe, C. and Barbeau, P. S. and Becker, B. and Belov, V. and Bernardi, I. and Bock, C. and Bolozdynya, A. and Bouabid, R. and Brown, A. and et al.}, year={2023}, month={Dec} }
 @article{akimov_an_awe_barbeau_becker_belov_bernardi_blackston_bock_bolozdynya_et al._2022, title={COHERENT constraint on leptophobic dark matter using CsI data}, volume={106}, ISSN={["2470-0029"]}, DOI={10.1103/PhysRevD.106.052004}, abstractNote={We use data from the COHERENT CsI[Na] scintillation detector to constrain sub-GeV leptophobic dark matter models. This detector was built to observe low-energy nuclear recoils from coherent elastic neutrino-nucleus scattering. These capabilities enable searches for dark matter particles produced at the Spallation Neutron Source mediated by a vector portal particle with masses between 2 and 400 MeV/c 2 . No evidence for dark matter is observed and a limit on the mediator coupling to quarks is placed. This constraint improves upon previous results by two orders of magnitude. This newly explored parameter space probes the region where the dark matter relic abundance is explained by leptophobic dark matter when the mediator mass is roughly twice the dark matter mass. COHERENT sets the best constraint on leptophobic dark matter at these masses.}, number={5}, journal={PHYSICAL REVIEW D}, author={Akimov, D. and An, P. and Awe, C. and Barbeau, P. S. and Becker, B. and Belov, V. and Bernardi, I. and Blackston, M. A. and Bock, C. and Bolozdynya, A. and et al.}, year={2022}, month={Sep} }
 @article{coherent collaboration_akimov_an_awe_barbeau_becker_belov_bernardi_blackston_bock_et al._2022, title={Measurement of scintillation response of CsI[Na] to low-energy nuclear recoils by COHERENT}, volume={17}, ISSN={["1748-0221"]}, DOI={10.1088/1748-0221/17/10/P10034}, abstractNote={Abstract}, number={10}, journal={JOURNAL OF INSTRUMENTATION}, author={COHERENT Collaboration, C. O. H. E. R. E. N. T. Collaboration and Akimov, D. and An, P. and Awe, C. and Barbeau, P. S. and Becker, B. and Belov, V. and Bernardi, I. and Blackston, M. A. and Bock, C. and et al.}, year={2022}, month={Oct} }
 @article{akimov_an_awe_barbeau_becker_belov_bernardi_blackston_bock_bolozdynya_et al._2022, title={Measurement of the Coherent Elastic Neutrino-Nucleus Scattering Cross Section on CsI by COHERENT}, volume={129}, ISSN={["1079-7114"]}, DOI={10.1103/PhysRevLett.129.081801}, abstractNote={We measured the cross section of coherent elastic neutrino-nucleus scattering (CEvNS) using a CsI[Na] scintillating crystal in a high flux of neutrinos produced at the Spallation Neutron Source at Oak Ridge National Laboratory. New data collected before detector decommissioning have more than doubled the dataset since the first observation of CEvNS, achieved with this detector. Systematic uncertainties have also been reduced with an updated quenching model, allowing for improved precision. With these analysis improvements, the COHERENT Collaboration determined the cross section to be (165_{-25}^{+30})×10^{-40}  cm^{2}, consistent with the standard model, giving the most precise measurement of CEvNS yet. The timing structure of the neutrino beam has been exploited to compare the CEvNS cross section from scattering of different neutrino flavors. This result places leading constraints on neutrino nonstandard interactions while testing lepton flavor universality and measures the weak mixing angle as sin^{2}θ_{W}=0.220_{-0.026}^{+0.028} at Q^{2}≈(50  MeV)^{2}.}, number={8}, journal={PHYSICAL REVIEW LETTERS}, author={Akimov, D. and An, P. and Awe, C. and Barbeau, P. S. and Becker, B. and Belov, V. and Bernardi, I. and Blackston, M. A. and Bock, C. and Bolozdynya, A. and et al.}, year={2022}, month={Aug} }
 @article{akimov_an_awe_barbeau_becker_belov_bernardi_blackston_bock_bolozdynya_et al._2022, title={Monitoring the SNS basement neutron background with the MARS detector}, volume={17}, ISSN={["1748-0221"]}, DOI={10.1088/1748-0221/17/03/P03021}, abstractNote={Abstract}, number={3}, journal={JOURNAL OF INSTRUMENTATION}, author={Akimov, D. and An, P. and Awe, C. and Barbeau, P. S. and Becker, B. and Belov, V and Bernardi, I and Blackston, M. A. and Bock, C. and Bolozdynya, A. and et al.}, year={2022}, month={Mar} }
 @article{akimov_an_awe_barbeau_becker_belov_bernardi_blackston_bock_bolozdynya_et al._2022, title={Simulating the neutrino flux from the Spallation Neutron Source for the COHERENT experiment}, volume={106}, ISSN={["2470-0029"]}, DOI={10.1103/PhysRevD.106.032003}, abstractNote={The Spallation Neutron Source (SNS) at Ridge National Laboratory is a pulsed source of neutrons and, as a byproduct of this operation, an intense source of pulsed neutrinos via stopped-pion decay. The COHERENT collaboration uses this source to investigate coherent elastic neutrino-nucleus scattering and other physics with a suite of detectors. This work includes a description of our Geant4 simulation of neutrino production at the SNS and the flux calculation which informs the COHERENT studies. We estimate the uncertainty of this calculation at ∼ 10% based on validation against available low-energy π + production data.}, number={3}, journal={PHYSICAL REVIEW D}, author={Akimov, D. and An, P. and Awe, C. and Barbeau, P. S. and Becker, B. and Belov, V and Bernardi, I and Blackston, M. A. and Bock, C. and Bolozdynya, A. and et al.}, year={2022}, month={Aug} }