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Background model of the ANAIS-112 dark matter experiment

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arxiv 2110.08109 v1 pith:SP262CZB submitted 2021-10-15 physics.ins-det hep-ex

Background model of the ANAIS-112 dark matter experiment

J Amare , S Cebrian , D Cintas , I Coarasa , E Garcia , M Martinez , M A Olivan , Y Ortigoza
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A Ortiz de Solorzano J Puimedon A Salinas M L Sarsa P Villar
This is my paper
classification physics.ins-det hep-ex
keywords backgrounddatamodelanais-112modulationanalysisannualenergy
verification ladder T0 review T1 audit T2 compute T3 formal T4 reserved
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The ANAIS (Annual modulation with NaI(Tl) Scintillators) experiment aims at the confirmation or refutation of the DAMA/LIBRA positive annual modulation signal in the low energy detection rate. ANAIS-112, consisting of nine 12.5 kg NaI(Tl) modules, is taking data since August, 2017 at the Canfranc Underground Laboratory (LSC) in Spain. Results from the analysis of three years of data are compatible with the absence of modulation. The background model developed for all nine ANAIS-112 detectors was established from commissioning data and non-blinded events in the first year of data taking. Now, background characterization is being improved profiting from the larger accumulated exposure available. Here, the background model is described and comparisons of model and measurements for energy spectra and counting rate time evolution for three-year exposure (considering different analysis conditions) are presented.

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  1. First Experimental Bounds on Transverse Plasmon Solar Axions with ANAIS-112

    hep-ex 2026-07 conditional novelty 7.0

    ANAIS-112 found no annual modulation from solar axions produced by resonant transverse-plasmon conversion, setting a 90% C.L. limit gaγ<1.32e-9 GeV^-1 at ma≈150 eV.