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EXCESS workshop: Descriptions of rising low-energy spectra

Journal Article · · SciPost Physics Proceedings
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  1. Stony Brook University
  2. National Autonomous University of Mexico
  3. University of Michigan–Ann Arbor
  4. Max Planck Institute for Physics
  5. University of Paris-Saclay
  6. Claude Bernard University Lyon 1
  7. Queen's University
  8. Austrian Academy of Sciences, Vienna University of Technology
  9. Fermi National Accelerator Laboratory
  10. Grenoble Alpes University
  11. Joint Institute for Nuclear Research
  12. Tel Aviv University
  13. National Institute for Nuclear Physics
  14. Institut Néel
  15. Max Planck Institute for Physics, University of Coimbra
  16. Texas A&M University
  17. University of Buenos Aires
  18. Comenius University Bratislava
  19. Pacific Northwest National Laboratory
  20. University of Buenos Aires, Fermi National Accelerator Laboratory
  21. National Institute for Nuclear Physics, Sapienza University of Rome
  22. National Institute for Nuclear Physics, University of Rome Tor Vergata
  23. Queen's University, University of Paris-Saclay
  24. University of Massachusetts Amherst
  25. National Institute of Science Education and Research
  26. University of Washington
  27. Northwestern University
  28. Lawrence Berkeley National Laboratory
  29. Universidad Nacional del Sur, Fermi National Accelerator Laboratory
  30. Istituto di Nanotecnologia, National Institute for Nuclear Physics
  31. Southern Methodist University
  32. Royal Military College of Canada
  33. University of Minnesota
  34. University of Alberta
  35. Sam Houston State University
  36. Comisión Nacional de Energía Atómica
  37. Karlsruhe Institute of Technology, University of Hamburg
  38. Fermi National Accelerator Laboratory, University of Chicago
  39. Vienna University of Technology
  40. Massachusetts Institute of Technology
  41. Austrian Academic Library Consortium
  42. Institut Laue-Langevin
  43. Sorbonne University
  44. Austrian Academy of Sciences
  45. Laurentian University, Queen's University, SNOLAB
  46. INFN Sezione di Ferrara, University of Ferrara
  47. University of Toronto
  48. University of Tübingen
  49. University of Birmingham
  50. Technical University of Munich
  51. University of Zurich
  52. University of Oxford
  53. SNOLAB
  54. SLAC National Accelerator Laboratory
  55. University of Paris, University of Paris-Saclay
  56. University of Nantes
  57. Sorbonne University, University of Chicago
  58. INFN Sezione di Ferrara
  59. TRIUMF, University of British Columbia
  60. University of Chicago
  61. National Institute for Nuclear Physics, University of Cassino and Southern Lazio
  62. California Institute of Technology, University of Chicago
  63. University of Florida
  64. University of South Dakota
  65. Aristotle University of Thessaloniki
  66. Bariloche Atomic Centre
  67. Bariloche Atomic Centre, Fermi National Accelerator Laboratory
  68. Tel Aviv University, Fermi National Accelerator Laboratory
  69. University of Cantabria
  70. University of California, Berkeley
  71. Karlsruhe Institute of Technology
  72. University of Oregon
  73. University of Hamburg
+ Show Author Affiliations

Many low-threshold experiments observe sharply rising event rates of yet unknown origins below a few hundred eV, and larger than expected from known backgrounds. Due to the significant impact of this excess on the dark matter or neutrino sensitivity of these experiments, a collective effort has been started to share the knowledge about the individual observations. For this, the EXCESS Workshop was initiated. In its first iteration in June 2021, ten rare event search collaborations contributed to this initiative via talks and discussions. The contributing collaborations were CONNIE, CRESST, DAMIC, EDELWEISS, MINER, NEWS-G, NUCLEUS, RICOCHET, SENSEI and SuperCDMS. They presented data about their observed energy spectra and known backgrounds together with details about the respective measurements. In this paper, we summarize the presented information and give a comprehensive overview of the similarities and differences between the distinct measurements. The provided data is furthermore publicly available on the workshop's data repository together with a plotting tool for visualization.

Sponsoring Organization:
USDOE
Grant/Contract Number:
AC02-07CH11359; AC02-76SF00515; AC05-76RL01830; SC0017859; SC0017938; SC0018981; SC0020097; SC0020181; SC0021051
OSTI ID:
1880719
Journal Information:
SciPost Physics Proceedings, Journal Name: SciPost Physics Proceedings Journal Issue: 9; ISSN 2666-4003
Publisher:
Stichting SciPostCopyright Statement
Country of Publication:
Netherlands
Language:
English

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