000121106 001__ 121106
000121106 005__ 20240319081001.0
000121106 0247_ $$2doi$$a10.1088/1475-7516/2022/11/048
000121106 0248_ $$2sideral$$a131710
000121106 037__ $$aART-2022-131710
000121106 041__ $$aeng
000121106 100__ $$0(orcid)0000-0002-8100-1368$$aCoarasa, I.$$uUniversidad de Zaragoza
000121106 245__ $$aImproving ANAIS-112 sensitivity to DAMA/LIBRA signal with machine learning techniques
000121106 260__ $$c2022
000121106 5060_ $$aAccess copy available to the general public$$fUnrestricted
000121106 5203_ $$aAbstract
The DAMA/LIBRA observation of an annual modulation in the detection rate compatible with that expected for dark matter particles from the galactic halo has accumulated evidence for more than twenty years. It is the only hint of a direct detection of the elusive dark matter, but it is in strong tension with the negative results of other very sensitive experiments, requiring ad-hoc scenarios to reconcile all the present experimental results. Testing the DAMA/LIBRA result using the same target material, NaI(Tl), removes the dependence on the particle and halo models and is the goal of the ANAIS-112 experiment, taking data at the Canfranc Underground Laboratory in Spain since August 2017 with 112.5 kg of NaI(Tl). At very low energies, the detection rate is dominated by non-bulk scintillation events and careful event selection is mandatory. This article summarizes the efforts devoted to better characterize and filter this contribution in ANAIS-112 data using a boosted decision tree (BDT), trained for this goal with high efficiency. We report on the selection of the training populations, the procedure to determine the optimal cut on the BDT parameter, the estimate of the efficiencies for the selection of bulk scintillation in the region of interest (ROI), and the evaluation of the performance of this analysis with respect to the previous filtering. The improvement achieved in background rejection in the ROI, but moreover, the increase in detection efficiency, push the ANAIS-112 sensitivity to test the DAMA/LIBRA annual modulation result beyond 3σ with three-year exposure, being possible to reach 5σ by extending the data taking for a few more years than the scheduled 5 years which were due in August 2022.
000121106 536__ $$9info:eu-repo/grantAgreement/ES/MICINN/PID2019-104374GB-I00$$9info:eu-repo/grantAgreement/ES/MINECO/Consolider-Ingenio2010-MULTI-DARK-CSD2009-00064$$9info:eu-repo/grantAgreement/ES/MINECO/Consolider-Ingenio2010-MULTI-DARK-CPANCSD2007-00042
000121106 540__ $$9info:eu-repo/semantics/openAccess$$aby$$uhttp://creativecommons.org/licenses/by/3.0/es/
000121106 590__ $$a6.3$$b2022
000121106 592__ $$a0.893$$b2022
000121106 591__ $$aPHYSICS, PARTICLES & FIELDS$$b5 / 29 = 0.172$$c2022$$dQ1$$eT1
000121106 593__ $$aAstronomy and Astrophysics$$c2022$$dQ2
000121106 591__ $$aASTRONOMY & ASTROPHYSICS$$b10 / 69 = 0.145$$c2022$$dQ1$$eT1
000121106 594__ $$a10.2$$b2022
000121106 655_4 $$ainfo:eu-repo/semantics/article$$vinfo:eu-repo/semantics/submittedVersion
000121106 700__ $$aApilluelo, J.
000121106 700__ $$0(orcid)0000-0002-7158-9794$$aAmaré, J.$$uUniversidad de Zaragoza
000121106 700__ $$0(orcid)0000-0002-6948-5101$$aCebrián, S.$$uUniversidad de Zaragoza
000121106 700__ $$0(orcid)0000-0001-5187-2640$$aCintas, D.$$uUniversidad de Zaragoza
000121106 700__ $$aGarcía, E.
000121106 700__ $$aMartínez, M.
000121106 700__ $$aOliván, M.A.
000121106 700__ $$0(orcid)0000-0002-2793-7544$$aOrtigoza, Y.$$uUniversidad de Zaragoza
000121106 700__ $$aOrtiz de Solórzano, A.
000121106 700__ $$aPardo, T.
000121106 700__ $$0(orcid)0000-0001-8732-8196$$aPuimedón, J.$$uUniversidad de Zaragoza
000121106 700__ $$aSalinas, A.
000121106 700__ $$0(orcid)0000-0002-7552-1228$$aSarsa, M.L.$$uUniversidad de Zaragoza
000121106 700__ $$0(orcid)0000-0002-6519-4315$$aVillar, P.$$uUniversidad de Zaragoza
000121106 7102_ $$12002$$2647$$aUniversidad de Zaragoza$$bDpto. Física Aplicada$$cÁrea Óptica
000121106 7102_ $$12004$$2390$$aUniversidad de Zaragoza$$bDpto. Física Teórica$$cÁrea Física Atóm.Molec.y Nucl.
000121106 773__ $$g2022, 11 (2022), 048$$pJ. Cosmol. Astropart. Phys.$$tJournal of Cosmology and Astroparticle Physics$$x1475-7516
000121106 8564_ $$s5456675$$uhttps://zaguan.unizar.es/record/121106/files/texto_completo.pdf$$yPreprint
000121106 8564_ $$s2298425$$uhttps://zaguan.unizar.es/record/121106/files/texto_completo.jpg?subformat=icon$$xicon$$yPreprint
000121106 909CO $$ooai:zaguan.unizar.es:121106$$particulos$$pdriver
000121106 951__ $$a2024-03-18-14:07:56
000121106 980__ $$aARTICLE