Response of CsI[Na] to Nuclear Recoils: Impact on Coherent Elastic Neutrino-Nucleus Scattering (CE$\nu$NS)

Abstract

A new measurement of the quenching factor for low-energy nuclear recoils in CsI[Na] is presented. Past measurements are revisited, identifying and correcting several systematic effects. The resulting global data are well-described by a physics-based model for the generation of scintillation by ions in this material, in agreement with phenomenological considerations. The uncertainty in the new model is reduced by a factor of four with respect to an energy-independent quenching factor initially adopted as a compromise by the COHERENT collaboration. A significantly improved agreement with Standard Model predictions for the first measurement of CE$\nu$NS is generated. We emphasize the critical impact of the quenching factor on the search for new physics via CE$\nu$NS experiments.

arXiv comment7 pages, 7 figures. V2: minor edits, one reference added. Version submitted to journal

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Cited by in corpus (29)

• Measurement of the Coherent Elastic Neutrino-Nucleus Scattering Cross Section on CsI by COHERENT
• Measurement of Coherent Elastic Neutrino-Nucleus Scattering from reactor antineutrinos
• General COHERENT Constraints on Neutrino Non-Standard Interactions
• Improved global fit to Non-Standard neutrino Interactions using COHERENT energy and timing data
• Physics results from the first COHERENT observation of CE$\nu$NS in argon and their combination with cesium-iodide data
• Germanium response to sub-keV nuclear recoils: a multipronged experimental characterization
• Recent probes of standard and non-standard neutrino physics with nuclei
• Impact of the Dresden-II and COHERENT neutrino scattering data on neutrino electromagnetic properties and electroweak physics
• Neutrino, Electroweak and Nuclear Physics from COHERENT Elastic Neutrino-Nucleus Scattering with a New Quenching Factor
• New physics from COHERENT data with improved Quenching Factor
• A Statistical Analysis of the COHERENT Data and Applications to New Physics
• Determining the nuclear neutron distribution from Coherent Elastic neutrino-Nucleus Scattering: current results and future prospects
• COHERENT constraints after the COHERENT-2020 quenching factor measurement
• Particle Physics at the European Spallation Source
• CP violating effects in coherent elastic neutrino-nucleus scattering processes
• Interplay between nonstandard and nuclear constraints in coherent elastic neutrino-nucleus scattering experiments
• Impact of COHERENT measurements, cross section uncertainties and new interactions on the neutrino floor
• Constraints on light singlet fermion interactions from coherent elastic neutrino-nucleus scattering
• Response of undoped cryogenic CsI to low-energy nuclear recoils
• CP-Violating and Charged Current Neutrino Non-standard Interactions in CE$\nu$NS
• Studies of Quantum-Mechanical Coherency Effects in Neutrino-Nucleus Elastic Scattering
• Constraining scalar leptoquarks using COHERENT data
• Electroweak Constraints from the COHERENT Experiment
• Search for inelastic WIMP-iodine scattering with COSINE-100
• Constraining Non-minimal Dark Sector Scenarios with the COHERENT Neutrino Scattering Data
• A chiral gauge-invariant model for Majorana neutrinos
• Measurement of scintillation response of CsI[Na] to low-energy nuclear recoils by COHERENT
• A Light Mediator Relating Neutrino Reactions
• Bounds on new physics with data of the Dresden-II reactor experiment and COHERENT