000118091 001__ 118091 000118091 005__ 20230706131656.0 000118091 0247_ $$2doi$$a10.1088/1742-6596/2156/1/012036 000118091 0248_ $$2sideral$$a129419 000118091 037__ $$aART-2022-129419 000118091 041__ $$aeng 000118091 100__ $$0(orcid)0000-0002-8100-1368$$aCoarasa, I.$$uUniversidad de Zaragoza 000118091 245__ $$aMachine-learning techniques applied to three-year exposure of ANAIS–112 000118091 260__ $$c2022 000118091 5060_ $$aAccess copy available to the general public$$fUnrestricted 000118091 5203_ $$aANAIS is a direct dark matter detection experiment aiming at the confirmation or refutation of the DAMA/LIBRA positive annual modulation signal in the low energy detection rate, using the same target and technique. ANAIS–112, located at the Canfranc Underground Laboratory in Spain, is operating an array of 3×3 ultrapure NaI(Tl) crystals with a total mass of 112.5 kg since August 2017. The trigger rate in the region of interest (1-6 keV) is dominated by non-bulk scintillation events. In order to discriminate these noise events from bulk scintillation events, robust filtering protocols have been developed. Although this filtering procedure works very well above 2 keV, the measured rate from 1 to 2 keV is about 50% higher than expected according to our background model, and we cannot discard non-bulk scintillation events as responsible of that excess. In order to improve the rejection of noise events, a Boosted Decision Tree has been developed and applied. With this new PMT-related noise rejection algorithm, the ANAIS–112 background between 1 and 2 keV is reduced by almost 30%, leading to an increase in sensitivity to the annual modulation signal. The reanalysis of the three years of ANAIS–112 data with this technique is also presented. 000118091 536__ $$9info:eu-repo/grantAgreement/ES/DGA/E27-20R$$9info:eu-repo/grantAgreement/ES/MICINN/CPAN-CSD2007-00042$$9info:eu-repo/grantAgreement/ES/MICINN/FPI-CSD2009-00064$$9info:eu-repo/grantAgreement/ES/MICINN/PID2019-104374GB-I00$$9info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2017-83133-P$$9info:eu-repo/grantAgreement/ES/MINECO/Spanish Red Consolider MultiDark FPA2017-90566-REDC 000118091 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/ 000118091 592__ $$a0.183$$b2022 000118091 593__ $$aPhysics and Astronomy (miscellaneous)$$c2022 000118091 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/publishedVersion 000118091 700__ $$aApilluelo, J. 000118091 700__ $$0(orcid)0000-0002-7158-9794$$aAmaré, J.$$uUniversidad de Zaragoza 000118091 700__ $$0(orcid)0000-0002-6948-5101$$aCebrián, S.$$uUniversidad de Zaragoza 000118091 700__ $$0(orcid)0000-0001-5187-2640$$aCintas, D.$$uUniversidad de Zaragoza 000118091 700__ $$0(orcid)0000-0002-9827-2332$$aGarcía, E.$$uUniversidad de Zaragoza 000118091 700__ $$0(orcid)0000-0002-9043-4691$$aMartínez, M.$$uUniversidad de Zaragoza 000118091 700__ $$aOliván, M. A. 000118091 700__ $$0(orcid)0000-0002-2793-7544$$aOrtigoza, Y.$$uUniversidad de Zaragoza 000118091 700__ $$0(orcid)0000-0001-8278-6032$$aOrtiz de Solórzano, A.$$uUniversidad de Zaragoza 000118091 700__ $$0(orcid)0000-0001-8732-8196$$aPuimedón, J.$$uUniversidad de Zaragoza 000118091 700__ $$aSalinas, A. 000118091 700__ $$0(orcid)0000-0002-7552-1228$$aSarsa, M. L.$$uUniversidad de Zaragoza 000118091 700__ $$0(orcid)0000-0002-6519-4315$$aVillar, P.$$uUniversidad de Zaragoza 000118091 7102_ $$12004$$2X$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cÁrea Técnica. Lab. y Talleres 000118091 7102_ $$12002$$2647$$aUniversidad de Zaragoza$$bDpto. Física Aplicada$$cÁrea Óptica 000118091 7102_ $$12004$$2390$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cÁrea Física Atóm.Molec.y Nucl. 000118091 773__ $$g2156 (2022), 012036[5 pp.]$$pJ. Phys.: Conf. Ser.$$tJournal of Physics: Conference Series$$x1742-6588 000118091 8564_ $$s589997$$uhttps://zaguan.unizar.es/record/118091/files/texto_completo.pdf$$yVersión publicada 000118091 8564_ $$s1151329$$uhttps://zaguan.unizar.es/record/118091/files/texto_completo.jpg?subformat=icon$$xicon$$yVersión publicada 000118091 909CO $$ooai:zaguan.unizar.es:118091$$particulos$$pdriver 000118091 951__ $$a2023-07-06-12:23:56 000118091 980__ $$aARTICLE