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PreprintCC BY 4.0arXiv

Optimized filtering for pulse-shape based pile-up rejection applied to 0νββ search with 100Mo

  • V. Berest
  • M. Buchynska
  • P. Carniti
  • A. Giuliani
  • C. Gotti
  • H. Khalife
  • P. Loaiza
  • P. de Marcillac
  • C. Nones
  • M. Pageot
  • E. Olivieri
  • G. Pessina
4 more authors
  • D. V. Poda
  • J. A. Scarpaci
  • B. Schmidt
  • A. S. Zolotarova
Open at sourcePDFDOICite

Abstract

Pile-up events, arising from the partial or complete temporal overlap of distinct signals, represent a major challenge in many areas of experimental physics where rare or low-rate processes are targeted. If not properly identified, pile-up can distort reconstructed observables, degrade energy resolution, and generate backgrounds that mimic genuine events of interest. This work presents an algorithm to obtain an optimized digital filter for the discrimination of pile-up events for detectors with known signal response and stationary noise power spectral density. It is developed in the context of the search for neutrinoless double beta decay with cryogenic Li2100MoO4 detectors like CUPID, where pile-up induced background from 100Mo 2νββ is expected to be the leading background contribution. For this application, the new filter discriminant reduces the pile-up induced background (at 90% efficiency) by 31%, compared to an analysis with a reference method previously presented in Eur. Phys. J. C 83(5), 373 (2023). While the discussion is grounded in cryogenic calorimetric detectors, the concepts and methods described are broadly applicable to a wide class of detector technologies and experimental contexts.

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Cite

BibTeXRIS
BibTeX
@misc{berest2026optimized,
  title = {{Optimized filtering for pulse-shape based pile-up rejection applied to $0νββ$ search with $^100$Mo}},
  author = {V. Berest and M. Buchynska and P. Carniti and A. Giuliani and C. Gotti and H. Khalife and P. Loaiza and P. de Marcillac and C. Nones and M. Pageot and E. Olivieri and G. Pessina and D. V. Poda and J. A. Scarpaci and B. Schmidt and A. S. Zolotarova},
  howpublished = {arXiv},
  year = {2026},
  month = aug,
  doi = {10.48550/arxiv.2606.17948},
  eprint = {2606.17948},
  archivePrefix = {arXiv},
  url = {https://arxiv.org/abs/2606.17948},
  note = {CC BY 4.0},
}
RIS
TY  - UNPB
TI  - Optimized filtering for pulse-shape based pile-up rejection applied to 0νββ search with ^100Mo
AU  - V. Berest
AU  - M. Buchynska
AU  - P. Carniti
AU  - A. Giuliani
AU  - C. Gotti
AU  - H. Khalife
AU  - P. Loaiza
AU  - P. de Marcillac
AU  - C. Nones
AU  - M. Pageot
AU  - E. Olivieri
AU  - G. Pessina
AU  - D. V. Poda
AU  - J. A. Scarpaci
AU  - B. Schmidt
AU  - A. S. Zolotarova
PY  - 2026
DA  - 2026/08/28
PB  - arXiv
DO  - 10.48550/arxiv.2606.17948
UR  - https://arxiv.org/abs/2606.17948
AB  - Pile-up events, arising from the partial or complete temporal overlap of distinct signals, represent a major challenge in many areas of experimental physics where rare or low-rate processes are targeted. If not properly identified, pile-up can distort reconstructed observables, degrade energy resolution, and generate backgrounds that mimic genuine events of interest. This work presents an algorithm to obtain an optimized digital filter for the discrimination of pile-up events for detectors with known signal response and stationary noise power spectral density. It is developed in the context of the search for neutrinoless double beta decay with cryogenic Li_2^100MoO_4 detectors like CUPID, where pile-up induced background from ^100Mo 2νββ is expected to be the leading background contribution. For this application, the new filter discriminant reduces the pile-up induced background (at 90% efficiency) by 31%, compared to an analysis with a reference method previously presented in Eur. Phys. J. C 83(5), 373 (2023). While the discussion is grounded in cryogenic calorimetric detectors, the concepts and methods described are broadly applicable to a wide class of detector technologies and experimental contexts.
ER  -