Results on Low-Mass Weakly Interacting Massive Particles from an 11 kg d Target Exposure of DAMIC at SNOLAB

Autor: Letessier Selvon, A., Aguilar-Arevalo, A., Amidei, D., Baxter, D., Cancelo, G., Vergara, B. A. Cervantes, Chavarria, A. E., D’Olivo, J. C., Estrada, J., Favela-Perez, F., Gaïor, R., Guardincerri, Y., Hoppe, E. W., Hossbach, T. W., Kilminster, B., Lawson, I., Lee, S. J., Letessier-Selvon, A., Matalon, A., Mitra, P., Overman, C. T., Piers, A., Privitera, P., Ramanathan, K., Da Rocha, J., Sarkis, Y., Settimo, M., Smida, R., Thomas, R., Tiffenberg, J., Traina, M., Vilar, R., Virto, A. L.
Přispěvatelé: Laboratoire de Physique Nucléaire et de Hautes Énergies (LPNHE (UMR_7585)), Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-Sorbonne Université (SU)-Centre National de la Recherche Scientifique (CNRS)-Université de Paris (UP), Laboratoire de physique subatomique et des technologies associées (SUBATECH), Université de Nantes - UFR des Sciences et des Techniques (UN UFR ST), Université de Nantes (UN)-Université de Nantes (UN)-Centre National de la Recherche Scientifique (CNRS)-Institut National de Physique Nucléaire et de Physique des Particules du CNRS (IN2P3)-IMT Atlantique Bretagne-Pays de la Loire (IMT Atlantique), Institut Mines-Télécom [Paris] (IMT)-Institut Mines-Télécom [Paris] (IMT), DAMIC, Agence Nationale de la Recherche (France), University of Chicago, National Science Foundation (US), Universidad Nacional Autónoma de México, Gordon and Betty Moore Foundation
Jazyk: angličtina
Rok vydání: 2020
Předmět:
WIMP nucleon: scattering
Cosmology and Nongalactic Astrophysics (astro-ph.CO)
Silicon
WIMP
Dark matter
energy spectrum
FOS: Physical sciences
General Physics and Astronomy
chemistry.chemical_element
silicon: target
dark matter: direct detection
01 natural sciences
7. Clean energy
High Energy Physics - Experiment
Nuclear physics
High Energy Physics - Experiment (hep-ex)
Ionization
0103 physical sciences
[PHYS.HEXP]Physics [physics]/High Energy Physics - Experiment [hep-ex]
010306 general physics
ComputingMilieux_MISCELLANEOUS
CCD
Physics
CDMS
background
010308 nuclear & particles physics
Scattering
dark matter: mass
Sigma
dark matter: scattering
chemistry
ionization: spatial distribution
radioactivity
Weakly interacting massive particles
Low Mass
[PHYS.ASTR]Physics [physics]/Astrophysics [astro-ph]
Astrophysics - Cosmology and Nongalactic Astrophysics
Zdroj: Physical Review Letters
Physical Review Letters, American Physical Society, 2020, 125 (24), ⟨10.1103/PhysRevLett.125.241803⟩
Physical Review Letters, American Physical Society, 2020, 125, pp.241803. ⟨10.1103/PhysRevLett.125.241803⟩
Digital.CSIC. Repositorio Institucional del CSIC
instname
ISSN: 0031-9007
1079-7114
DOI: 10.1103/PhysRevLett.125.241803⟩
Popis: DAMIC Collaboration: et al.
We present constraints on the existence of weakly interacting massive particles (WIMPs) from an 11 kg d target exposure of the DAMIC experiment at the SNOLAB underground laboratory. The observed energy spectrum and spatial distribution of ionization events with electron-equivalent energies >200eVee in the DAMIC CCDs are consistent with backgrounds from natural radioactivity. An excess of ionization events is observed above the analysis threshold of 50eVee. While the origin of this low-energy excess requires further investigation, our data exclude spin-independent WIMP-nucleon scattering cross sections σχ−n as low as 3×10−41cm2 for WIMPs with masses mχ from 7 to 10GeVc−2. These results are the strongest constraints from a silicon target on the existence of WIMPs with mχ
We acknowledge financial support from the following agencies and organizations: National Science Foundation through Grant No. NSF PHY-1806974 and Kavli Institute for Cosmological Physics at The University of Chicago through an endowment from the Kavli Foundation; Gordon and Betty Moore Foundation through Grant No. GBMF6210 to the University of Washington; Fermi National Accelerator Laboratory (Contract No. DE-AC02-07CH11359); Institut Lagrange de Paris Laboratoire d’Excellence (under Reference No. ANR-10-LABX-63) supported by French state funds managed by the Agence Nationale de la Recherche within the Investissements d’Avenir program under Reference No. ANR-11-IDEX0004-02; Swiss National Science Foundation through Grant No. 200021_153654 and via the Swiss Canton of Zurich; Mexico’s Consejo Nacional de Ciencia y Tecnología (Grant No. 240666) and Dirección General de Asuntos del Personal Academico–Universidad Nacional Autónoma de Mexico (Programa de Apoyo a Proyectos de Investigación e Innovación Tecnológica Grants No. IB100413 and No. IN112213); STFC Global Challenges Research Fund (Foundation Awards Grant No. ST/R002908/1).
Databáze: OpenAIRE
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