109119 20230519145419.0 doi 10.1103/PhysRevD.103.102005 sideral 125267 ART-2021-125267 eng Amaré, J. Universidad de Zaragoza (orcid)0000-0002-7158-9794 Annual modulation results from three-year exposure of ANAIS-112 2021 Access copy available to the general public Unrestricted ANAIS (annual modulation with NaI scintillators) is a dark matter direct detection experiment consisting of 112.5 kg of NaI(Tl) detectors in operation at the Canfranc Underground Laboratory (LSC), in Spain, since August 2017. ANAIS’ goal is to confirm or refute in a model independent way the DAMA/LIBRA positive result: an annual modulation in the low-energy detection rate having all the features expected for the signal induced by dark matter particles in a standard galactic halo. This modulation, observed for about 20 years, is in strong tension with the negative results of other very sensitive experiments, but a model-independent comparison is still lacking. By using the same target material, NaI(Tl), such a comparison is more direct and almost independent in dark matter particle and halo models. Here, we present the annual modulation analysis corresponding to three years of ANAIS data (for an effective exposure of 313.95 kg×y), applying a blind procedure, which updates the one developed for the 1.5 years analysis, and later applied to 2 years. The analysis also improves the background modeling in the fitting of the region of interest rates. We obtain for the best fit in the [1–6] keV ([2–6] keV) energy region a modulation amplitude of –0.0034±0.0042 cpd/kg/keV (0.0003±0.0037 cpd/kg/keV), supporting the absence of modulation in our data, and incompatible with the DAMA/LIBRA result at 3.3 (2.6) σ , for a sensitivity of 2.5 (2.7) σ . Moreover, we include two complementary analyses: a phase-free annual modulation search and the exploration of the possible presence of a periodic signal at other frequencies. Finally, we carry out several consistency checks of our result, and we update the ANAIS-112 projected sensitivity for the scheduled 5 years of operation. info:eu-repo/grantAgreement/ES/MICINN/FPI-CSD2009-00064 info:eu-repo/grantAgreement/ES/MICINN/PID2019-104374GB-I00 info:eu-repo/grantAgreement/ES/MINECO/Consolider-Ingenio2010-MULTI-DARK-CPANCSD2007-00042 info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2017-83133-P info:eu-repo/grantAgreement/ES/MINECO/FPA2017-90566-REDC info:eu-repo/semantics/openAccess All rights reserved http://www.europeana.eu/rights/rr-f/ 5.407 2021 PHYSICS, PARTICLES & FIELDS 7 / 29 = 0.241 2021 Q1 T1 ASTRONOMY & ASTROPHYSICS 16 / 69 = 0.232 2021 Q1 T1 1.677 2021 Physics and Astronomy (miscellaneous) 2021 Q1 Nuclear and High Energy Physics 2021 Q1 9.5 2021 info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion Cebrián, S. Universidad de Zaragoza (orcid)0000-0002-6948-5101 Cintas, D. Universidad de Zaragoza (orcid)0000-0001-5187-2640 Coarasa, I. Universidad de Zaragoza (orcid)0000-0002-8100-1368 García, E. Universidad de Zaragoza (orcid)0000-0002-9827-2332 Martínez, M. Oliván, M.A. Ortigoza, Y. Universidad de Zaragoza (orcid)0000-0002-2793-7544 Ortiz de Solórzano, A. Universidad de Zaragoza (orcid)0000-0001-8278-6032 Puimedón, J. Universidad de Zaragoza (orcid)0000-0001-8732-8196 Salinas, A. Sarsa, M.L. Universidad de Zaragoza (orcid)0000-0002-7552-1228 Villar, P. 2004 X Universidad de Zaragoza Dpto. Física Teórica Área Técnica. Lab. y Talleres 2002 647 Universidad de Zaragoza Dpto. Física Aplicada Área Óptica 2004 390 Universidad de Zaragoza Dpto. Física Teórica Área Física Atóm.Molec.y Nucl. 103, 10 (2021), 102005 [20 p.] Phys. rev. D Physical Review D 2470-0010 2652260 http://zaguan.unizar.es/record/109119/files/texto_completo.pdf Versión publicada 2795018 http://zaguan.unizar.es/record/109119/files/texto_completo.jpg?subformat=icon icon Versión publicada oai:zaguan.unizar.es:109119 articulos driver 2023-05-18-14:05:36 ARTICLE