ANAIS-112: updated results on annual modulation with three-year exposure

• DOI: 10.48550/arxiv.2311.03392
• Publication Date: 2023-01-01
• Authors: I. Coarasa; J. Amaré; Jaime Apilluelo; S. Cebrián; D. Cintas; E. Garcı́a; M. Martínez; M. A. Oliván; Y. Ortigoza; Alfonso Ortíz de ...; Tamara Pardo; J. Puimedón; A. Salinas; M.L. Sarsa; P. Villar
• Keywords: Modulation (music); SIGNAL (programming language)

The ANAIS experiment is intended to search for dark matter annual modulation with ultrapure NaI(Tl) scintillators in order provide a model independent confirmation or refutation of the long-standing DAMA/LIBRA positive signal low energy detection rate, using same target and technique. Other experiments exclude region parameters singled out by DAMA/LIBRA. However, these use different materials, so comparison their results depends on models assumed particle its distribution galactic halo. ANAIS-112, consisting nine 12.5 kg modules produced Alpha Spectra Inc., disposed 3$\times$3 matrix configuration, taking data smoothly excellent performance at Canfranc Underground Laboratory, Spain, since August, 2017. Last published corresponding three-year exposure were compatible absence incompatible sensitivity above 2.5$\sigma$ C.L. Present status reanalysis first 3 years new filtering protocols based machine-learning techniques are reported. This allows improve previously achieved signal. Updated prospects also presented: improved filtering, testing 5$\sigma$ will be within reach 2025.