Search

The Cryogenic Underground Observatory for Rare Events (CUORE) is the first bolometric experiment searching for neutrino-less double-beta (0 ν β β) decay that has been able to reach the one-ton scale. The detector, located at the Laboratori Nazionali del Gran Sasso in Italy, consists of an array of 988 TeO2 crystals arranged in a compact cylindrical structure of 19 towers. Following the completion of the detector construction in August 2016, CUORE began its first physics data run in 2017 at a base temperature of about 10 mK. Following multiple optimization campaigns in 2018, CUORE is currently in stable operating mode. In 2019, CUORE released its second result of the search for 0 ν β β corresponding to a TeO2 exposure of 372.5 kg ⋅ yr and a median exclusion sensitivity to a 130Te 0 ν β β decay half-life of 1. 7 ⋅ 1 0 2 5 yr. We find no evidence for 0 ν β β decay and set a 90% C.I. Bayesian lower limit of 3. 2 ⋅ 1 0 2 5 yr on the 130Te 0 ν β β decay half-life. We present the current status of CUORE's search for 0 ν β β. We give an update of the CUORE background model and the measurement of the 130Te two neutrino double-beta (2 ν β β) decay half-life. Eventually, we show the preliminary results on half-life limits from the analysis of 130Te 0 ν β β and 2 ν β β decay to the first 0 + excited state of 1 3 0 Xe. [ABSTRACT FROM AUTHOR]

Cryogenic Rare Event Search with Superconducting Thermometers (CRESST) is a long-standing direct dark matter detection experiment with cryogenic detectors located at the underground facility Laboratori Nazionali del Gran Sasso in Italy. CRESST-III, the third generation of CRESST, was specifically designed to have a world-leading sensitivity for low-mass dark matter (DM) (less than 2 GeV/ c 2 ) to probe the spin-independent DM-nucleus cross section. At present, a large part of the parameter space for spin-independent scattering off nuclei remains untested for dark matter particles with masses below few GeV/ c 2 although many motivated theoretical models having been proposed. The CRESST-III experiment employs scintillating CaWO 4 crystals of ∼ 25 g as target material for dark matter interactions operated as cryogenic scintillating calorimeters at ∼ 10 mK. CRESST-III first data taking was successfully completed in 2018, achieving an unprecedented energy threshold for nuclear recoils. This result extended the present sensitivity to DM particles as light as ∼ 160 MeV/ c 2 . In this paper, an overview of the CRESST-III detectors and results will be presented. [ABSTRACT FROM AUTHOR]

Abstract: The aim of CRESST (Cryogenic Rare Event Search with Superconducting Thermometers) is to search for particle dark matter via elastic scattering off nuclei. The experiment is located at the Laboratori Nazionali del Gran Sasso (LNGS), Italy, and it uses low-background cryogenic detectors with superconducting phase-transition thermometers for the direct detection of WIMP–nucleus scattering events. [Copyright &y& Elsevier]