First Results on Dark Matter Annual Modulation from the ANAIS-112 Experiment

Amare, J. (Universidad de Zaragoza) ; Cebrian, S. (Universidad de Zaragoza) ; Coarasa, I. (Universidad de Zaragoza) ; Cuesta, C. ; Garcia, E. ; Martinez, M. (Universidad de Zaragoza) ; Olivan, M.A. (Universidad de Zaragoza) ; Ortigoza, Y. ; Ortiz de Solorzano, A. ; Puimedon, J. (Universidad de Zaragoza) ; Salinas, A. ; Sarsa, M.L. (Universidad de Zaragoza) ; Villar, P. (Universidad de Zaragoza) ; Villar, J.A.

Resumen: ANAIS is a direct detection dark matter experiment aiming at the testing of the DAMA/LIBRA annual modulation result, which, for about two decades, has neither been confirmed nor ruled out by any other experiment in a model independent way. ANAIS - 112, consisting of 112.5 kg of sodium iodide crystals, has been taking data at the Canfranc Underground Laboratory, Spain, since August 2017. This Letter presents the annual modulation analysis of 1.5 years of data, amounting to 157.55 kg yr. We focus on the model independent analysis searching for modulation and the validation of our sensitivity prospects. ANAIS - 112 data are consistent with the null hypothesis (p values of 0.67 and 0.18 for [2-6] and [1-6] keV energy regions, respectively). The best fits for the modulation hypothesis are consistent with the absence of modulation (S-m = -0.0044 +/- 0.0058 cpd/kg/keV and -0.0015 +/- 0.0063 cpd/kg/keV, respectively). They are in agreement with our estimated sensitivity for the accumulated exposure, which supports our projected goal of reaching a 3 sigma sensitivity to the DAMA/LIBRA result in five years of data taking.

Idioma: Inglés

DOI: 10.1103/PhysRevLett.123.031301

Año: 2019

Publicado en: Physical Review Letters 123, 3 (2019), 031301 [6 pp]
ISSN: 0031-9007

Factor impacto JCR: 8.385 (2019)

Categ. JCR: PHYSICS, MULTIDISCIPLINARY rank: 6 / 85 = 0.071 (2019) - Q1 - T1

Factor impacto SCIMAGO: 3.588 - Physics and Astronomy (miscellaneous) (Q1)

Financiación: info:eu-repo/grantAgreement/ES/MINECO/Consolider-Ingenio2010-MULTI-DARK-CSD2009-00064
Financiación: info:eu-repo/grantAgreement/ES/MINECO/Consolider-Ingenio2010-MULTI-DARK-CPANCSD2007-00042
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2014-55986-P
Financiación: info:eu-repo/grantAgreement/ES/MINECO-FEDER/FPA2017-83133-P
Financiación: info:eu-repo/grantAgreement/ES/MINECO/Spanish Red Consolider MultiDark FPA2017-90566-REDC

Tipo y forma: Article (Published version)

Área (Departamento): Área Ingen.Sistemas y Automát. (Dpto. Informát.Ingenie.Sistms.)
Área (Departamento): Área Óptica (Dpto. Física Aplicada)
Área (Departamento): Área Física Atóm.Molec.y Nucl. (Dpto. Física Teórica)