New results on low-mass dark matter from the CRESST-II experiment

14th International Conference on Topics in Astroparticle and Underground Physics

物理学;天文学

Petricca, F.^1 ; Angloher, G.^1 ; Bento, A.^2 ; Bucci, C.^3 ; Canonica, L.^3 ; Defay, X.^4 ; Erb, A.^4,5 ; V Feilitzsch, F.^4 ; Ferreiro Iachellini, N.^1 ; Gorla, P.^3 ; Gütlein, A.^6 ; Hauff, D.^1 ; Jochum, J.^7 ; Kiefer, M.^1 ; Kluck, H.^6 ; Kraus, H.^8 ; Lanfranchi, J.C.^4 ; Loebell, J.^7 ; Münster, A.^4 ; Pagliarone, C.^3 ; Potzel, W.^4 ; Pröbst, F.^1 ; Reindl, F.^1 ; Schäffner, K.^3 ; Schieck, J.^6 ; Schönert, S.^4 ; Seidel, W.^1 ; Stodolsky, L.^1 ; Strandhagen, C.^7 ; Strauss, R.^1 ; Tanzke, A.^1 ; Trinh Thi, H.H.^4 ; Türkolu, C.^6,9 ; Uffinger, M.^7 ; Ulrich, A.^4 ; Usherov, I.^7 ; Wawoczny, S.^4 ; Willers, M.^4 ; Wüstrich, M.^1 ; Zoller, A.^4

Max-Planck-Institut für Physik, Föhringer Ring 6, München

D-80805, Germany^1

Departamento de Fisica, Universidade de Coimbra, Coimbra

P-3004 516, Portugal^2

INFN, Laboratori Nazionali Del Gran Sasso, Assergi

1-67010, Italy^3

Physik-Department E15, Technische Universität München, Garching

D-85747, Germany^4

Walther-Meibner-Institut für Tieftemperaturforschung, Garching

D-85748, Germany^5

Institut für Hochenergiephysik der Österreichischen, Akademie der Wissenschaften, Wien

A-1050, Austria^6

Eberhard-Karls-Universität Tü Bingen, Tü bingen

D-72076, Germany^7

Department of Physics, University of Oxford, Oxford

OX1 3RH, United Kingdom^8

Atominstitut, Vienna University of Technology, Wien

A-1020, Austria^9

关键词: Cryogenic calorimeters;    Dark matter particles;    Dark matter searches;    Light dark matter;    Low energy thresholds;    Measurement campaign;    Millikelvin temperatures;    Transition-edge sensors;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/718/4/042044/pdf
DOI  :  10.1088/1742-6596/718/4/042044

学科分类：天文学(综合)

来源: IOP

【 摘 要 】

The CRESST-II experiment is searching for dark matter particles via their elastic scattering off nuclei in a target material. The CRESST target consists of scintillating CaW04crystals which are operated as cryogenic calorimeters at millikelvin temperatures and read out by transition edge sensors. Each interaction in the CaW04target crystal produces a phonon signal and also a light signal that is measured by a secondary cryogenic calorimeter. The low energy thresholds of these detectors, combined with the presence of light nuclei in the target material, allow to probe the low-mass region of the parameter space for spin-independent dark matter-nucleon scattering with high sensitivity. In this contribution results from a blind analysis of one detector module operated in the latest measurement campaign are presented. An unprecedented sensitivity for the light dark matter has been obtained with 52kg live days and a threshold of 307eV for nuclear recoils, extending the reach of direct dark matter searches to the sub-GeV/c2region.