First results on dark matter annual modulation from ANAIS-112 experiment

Abstract

ANAIS is a direct detection dark matter experiment aiming at the testing of the DAMA/LIBRA annual modulation result, which standing for about two decades has neither been confirmed nor ruled out by any other experiment in a model independent way. ANAIS-112, consisting of 112.5 kg of sodium iodide crystals, is taking data at the Canfranc Underground Laboratory, Spain, since August 2017. This letter presents the annual modulation analysis of 1.5 years of data, amounting to 157.55 kg$\times$y. We focus on the model independent analysis searching for modulation and the validation of our sensitivity prospects. ANAIS-112 data are consistent with the null hypothesis (p-values of 0.65 and 0.16 for [2-6] and [1-6] keV energy regions, respectively). The best fits for the modulation hypothesis are consistent with the absence of modulation ($S_m$=-0.0044$\pm$0.0058 cpd/kg/keV and -0.0015$\pm$0.0063 cpd/kg/keV, respectively). They are in agreement with our estimated sensitivity for the accumulated exposure, supporting our projected goal of reaching a 3$\sigma$ sensitivity to the DAMA/LIBRA result in 5 years of data taking.

arXiv comment6 pages, 4 figures

References in corpus (29)

• A History of Dark Matter
• First results from DAMA/LIBRA and the combined results with DAMA/NaI
• Final model independent result of DAMA/LIBRA-phase1
• The DAMA/LIBRA apparatus
• Annual Modulation of Dark Matter: A Review
• Current status of direct dark matter detection experiments
• First model independent results from DAMA/LIBRA-phase2
• Search for a Dark Matter-Induced Annual Modulation Signal in NaI(Tl) with the COSINE-100 Experiment
• Initial Performance of the COSINE-100 Experiment
• An experiment to search for dark matter interactions using sodium iodide detectors
• Search for dark matter at colliders
• The COSINUS project - perspectives of a NaI scintillating calorimeter for dark matter search
• Indirect dark matter searches in Gamma- and Cosmic Rays
• Exclusion of Leptophilic Dark Matter Models using XENON100 Electronic Recoil Data
• Search for Electronic Recoil Event Rate Modulation with 4 Years of XENON100 Data
• Dark Matter implications of DAMA/LIBRA-phase2 results
• Compatibility of DAMA/LIBRA dark matter detection with other searches in light of new Galactic rotation velocity measurements
• Analysis of backgrounds for the ANAIS-112 dark matter experiment
• Performance of ANAIS-112 experiment after the first year of data taking
• Search for annual and diurnal rate modulations in the LUX experiment
• Cosmogenic radionuclide production in NaI(Tl) crystals
• Assessment of backgrounds of the ANAIS experiment for dark matter direct detection
• DAMA/LIBRA-phase2 in WIMP effective models
• Direct dark matter search by annual modulation with 2.7 years of XMASS-I data
• ANAIS-112 sensitivity in the search for dark matter annual modulation
• Time-dependent rate of multicomponent dark matter: Reproducing the DAMA/LIBRA phase-2 results
• Light yield determination in large sodium iodide detectors applied in the search for dark matter
• Limits on Interactions between Weakly Interacting Massive Particles and Nucleons Obtained with NaI(Tl) crystal Detectors
• Halo-independent tests of dark matter annual modulation signals

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• Feebly-Interacting Particles:FIPs 2020 Workshop Report
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• Search for a Dark Matter-Induced Annual Modulation Signal in NaI(Tl) with the COSINE-100 Experiment
• Multi-Channel Direct Detection of Light Dark Matter: Target Comparison
• Annual modulation results from three-year exposure of ANAIS-112
• Multi-Channel Direct Detection of Light Dark Matter: Theoretical Framework
• Dark Shards: velocity substructure from Gaia and direct searches for dark matter
• Three-year annual modulation search with COSINE-100
• Annual Modulation in Direct Dark Matter Searches
• Search for Light Weakly-Interacting-Massive-Particle Dark Matter by Annual Modulation Analysis with a Point-Contact Germanium Detector at the China Jinping Underground Laboratory
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• Exploring coherent elastic neutrino-nucleus scattering using reactor electron antineutrinos in the NEON experiment
• Lowering the energy threshold in COSINE-100 dark matter searches
• Development of ultra-pure NaI(Tl) detectors for the COSINE-200 experiment
• Direct Detection of Dark Matter -- APPEC Committee Report
• Characterization of SABRE crystal NaI-33 with direct underground counting
• EXCEED-DM: Extended Calculation of Electronic Excitations for Direct Detection of Dark Matter
• An induced annual modulation signature in COSINE-100 data by DAMA/LIBRA's analysis method
• Review on dark matter searches
• Quenching factor measurements of sodium nuclear recoils in NaI:Tl determined by spectrum fitting
• Comparison between DAMA/LIBRA and COSINE-100 in the light of Quenching Factors
• Study of cosmogenic radionuclides in the COSINE-100 NaI(Tl) detectors
• Searching for High Frequency Gravitational Waves with Phonons
• WimPyDD: an object-oriented Python code for the calculation of WIMP direct detection signals
• High sensitivity characterization of an ultra-high purity NaI(Tl) crystal scintillator with the SABRE proof-of-principle detector
• Measurement of the Electron-Neutrino Charged-Current Cross Sections on ${}^{127}$I with the COHERENT NaI$\nu$E detector
• Robust model comparison tests of DAMA/LIBRA annual modulation
• ANAIS-112 status: two years results on annual modulation
• A semi-supervised approach to dark matter searches in direct detection data with machine learning
• Dark matter substructures affect dark matter-electron scattering in xenon-based direct detection experiments
• Effective Field Theory for Dark Matter Absorption on Single Phonons
• Scintillation characteristics of a NaI(Tl) crystal at low-temperature with silicon photomultiplier
• Annual modulations from secular variations: relaxing DAMA?
• Improving ANAIS-112 sensitivity to DAMA/LIBRA signal with machine learning techniques
• DAMA/LIBRA annual modulation and Axion Quark Nugget Dark Matter Model
• Quenching Factor consistency across several NaI(Tl) crystals
• Na-based crystal scintillators for next-generation rare event searches
• Depth profile study of ${}^{210}$Pb in the surface of an NaI(Tl) crystal
• Simulation-based design study for the passive shielding of the COSINUS dark matter experiment
• Prospect of undoped inorganic crystals at 77 Kelvin for low-mass dark matter search at Spallation Neutron Source
• First operation of undoped CsI directly coupled with SiPMs at 77 Kelvin
• Study on NaI(Tl) crystal at -35 C for dark matter detection
• Direct Detection Anomalies in light of $Gaia$ Data
• SABRE and the Stawell Underground Physics Laboratory: Dark Matter Research at the Australian National University
• Long-term evolution of the neutron rate at the Canfranc Underground Laboratory
• COSINE-100 Full Dataset Challenges the Annual Modulation Signal of DAMA/LIBRA
• Impact of Dark Compton Scattering on Direct Dark Matter Absorption Searches
• Gusts in the Headwind: Uncertainties in Direct Dark Matter Detection
• Zone refining of ultra-high purity sodium iodide for low-background detectors
• Double Beta Decay Experiments at Canfranc Underground Laboratory
• An independent search for annual modulation and its significance in ANAIS-112 data
• A novel experimental system for the KDK measurement of the ${}^{40}$K decay scheme relevant for rare event searches
• Long term measurement of the ${}^{222}$Rn concentration in the Canfranc Underground Laboratory
• Towards a Robust Model-Independent Test of the DAMA/LIBRA Dark Matter Signal: ANAIS-112 Results with Six Years of Data
• Incoherent solar-neutrino scattering off the stable Tl-isotopes
• Investigation of the cryogenic scintillation of pure and doped sodium-iodine
• The role of small scale experiments in the direct detection of dark matter
• A DAMA/Libra-phase2 analysis in terms of WIMP-quark and WIMP-gluon effective interactions up to dimension seven
• Measurement of the neutron flux at the Canfranc Underground Laboratory with HENSA
• MSSM WIMPs-nucleon cross section for E${}_{\chi }<$ 500 GeV
• Background modeling for dark matter search with 1.7 years of COSINE-100 data
• DAMA annual modulation is not due to electron recoils from Plasma/Mirror Dark Matter with Kinetic Mixing
• Background model of the ANAIS-112 dark matter experiment
• Small scale direct dark matter search experiments
• State of the Art in Direct Dark Matter Detectors: Technologies, Performance, and Future Directions
• Dark Matter Phenomenology: Sterile Neutrino Portal and Gravitational Portal in Extra-Dimensions
• Reflections on the search for particle dark matter by direct experiments