ANAIS-112 experiment is taking data at Canfranc Underground Laboratory since August 2017 in order to test DAMA/LIBRA signal. Updated results for three years and 112.5 kg, together with complementary analysis and consistency checks have been posted in arXiv this week:
Clara Cuesta, investigadora aragonesa y que formó parte durante varios años del equipo investigador del experimento ANAIS, ha sido galardonada con uno de los cinco premios L’Oréal-Unesco “For Women in Science” en su edición de 2021.
Clara, que ahora trabaja en el CIEMAT, estudia las propiedades de los neutrinos, elusivas partículas que sin embargo se espera que en el próximo futuro nos ayuden a entender mucho mejor el Universo y, por el camino, a desarrollar nuevas tecnologías.
Del 25 al 27 de enero de 2021 tendrá lugar en formato online el XVII Multidark Consolider Workshop. Los resultados de tres años de medidas de ANAIS se presentarán en la sesión de detección directa, el martes 26 de enero.
The evidence for dark matter (DM) is overwhelming from astrophysical and cosmological observations at all scales. Yet, its existence is inferred indirectly through gravitational effects, but its nature is still unknown. Among the preferred DM particle candidates are Weakly Interacting Massive Particles (WIMPs), new particles beyond the standard model (SM) with weak-scale couplings to SM particles. WIMPs in the Milky Way halo are expected to scatter off the nuclei of a particle detector located in the Earth, with an interaction rate that depends on their relative velocity with respect to the Earth. As a consequence of the Earth rotation around the Sun, this velocity varies with 1 year periodicity, and so does the expected interaction rate (annual modulation). For more than 20 years, the DAMA/LIBRA experiment at the Gran Sasso Underground Laboratory (Italy) has claimed a positive dark matter detection: an annual modulation in the low-energy detection rate compatible with the expected signal induced by dark matter particles. This signal is in strong tension with the negative results of other very sensitive experiments. However, until recently a direct comparison using the same target material (NaI(Tl)) was lacking.
ANAIS (annual modulation with NaI Scintillators) is a dark matter direct detection experiment located at the Canfranc Underground Laboratory (LSC, Spain). Its main goal is to test in a model independent way the DAMA/LIBRA positive result. ANAIS-112, consisting of 112.5 kg of NaI(Tl) scintillators, was installed at the LSC in 2017 and since then is taking data smoothly with excellent performances. Last year we released results from the first two years of data, which are compatible with the absence of modulation and in some tension with DAMA/LIBRA result. Moreover, the results support our goal of reaching a 3sigma sensitivity to the DAMA/LIBRA result with about 5 years of data-taking.
In this seminar I will briefly review the DAMA/LIBRA puzzle and the status of the experiments trying to reproduce it. Then I will introduce the ANAIS-112 experimental set-up, the detector performance and analysis methods. Finally, I will present the latest results and an update of the experimental sensitivity.
The biennial TAUP series covers recent experimental and theoretical developments in astroparticle physics by invited plenary review talks and parallel workshop sessions of invited and contributed presentations.
Topics covered by the conference include:
* Cosmology and particle physics * Dark matter and its detection * Neutrino physics and astrophysics * Gravitational waves * High-energy astrophysics and cosmic rays
María Luisa Sarsa, miembro del equipo experimental de ANAIS e investigadora del CAPA, publica en el número 2 del año 2020 de la Revista Española de Física un artículo de divulgación sobre la materia oscura y el experimento ANAIS. El acceso a la REF es libre en estos momentos. Puedes descargar el artículo en el enlace: