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<p>Dark matter remains one of the central open questions in particle physics. Astrophysical and cosmological observations imply its existence, yet its underlying nature is unknown. Low-temperature detectors are a powerful technology for detecting dark matter particles, offering excellent energy resolution and low energy thresholds. COSINUS is the only experiment that combines scintillating sodium iodide (NaI) crystals with an additional phonon readout at cryogenic temperatures, using superconducting sensors (remoTES), alongside the conventional scintillation light signal. Via the simultaneous phonon and scintillation light detection, a unique event-by-event particle identification is enabled. Here we show that this dual-channel approach allows for a model-independent cross-check of the long-standing DAMA/LIBRA signal claim with a moderate exposure of a few hundred kg d, while completely avoiding key systematic uncertainties inherent to scintillation-only NaI-based searches. COSINUS built and commissioned a dedicated low-background cryogenic facility at the LNGS underground laboratories. Data taking with eight NaI detector modules (COSINUS-1<i>π</i> Run1) is planned to begin in 2026.</p>

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COSINUS: a model-independent challenge to the DAMA/LIBRA dark matter claim using cryogenic NaI detectors

  • 期刊论文

  • 出版模式：

    开放获取

  • 发表日期：

    2026年4月23日

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  • G. Angloher,
  • M. R. Bharadwaj,
  • A. Böhmer,
  • M. Cababie,
  • I. Colantoni,
  • I. Dafinei,
  • N. Di Marco,
  • C. Dittmar,
  • L. Einfalt,
  • F. Ferella,
  • F. Ferroni,
  • S. Fichtinger,
  • A. Filipponi,
  • M. Friedl,
  • L. Gai,
  • M. Gapp,
  • M. Heikinheimo,
  • K. Heim,
  • M. N. Hughes,
  • K. Huitu,
  • M. Kellermann,
  • R. Maji,
  • M. Mancuso,
  • L. Pagnanini,
  • F. Petricca,
  • S. Pirro,
  • F. Pröbst,
  • G. Profeta,
  • A. Puiu,
  • F. Reindl,
  • K. Schäffner,
  • J. Schieck,
  • P. Schreiner,
  • C. Schwertner,
  • K. Shera,
  • M. Stahlberg,
  • A. Stendahl,
  • M. Stukel,
  • C. Tresca,
  • S. Yue,
  • V. Zema,
  • Y. Zhu,
  • N. Zimmermann

摘要

Dark matter remains one of the central open questions in particle physics. Astrophysical and cosmological observations imply its existence, yet its underlying nature is unknown. Low-temperature detectors are a powerful technology for detecting dark matter particles, offering excellent energy resolution and low energy thresholds. COSINUS is the only experiment that combines scintillating sodium iodide (NaI) crystals with an additional phonon readout at cryogenic temperatures, using superconducting sensors (remoTES), alongside the conventional scintillation light signal. Via the simultaneous phonon and scintillation light detection, a unique event-by-event particle identification is enabled. Here we show that this dual-channel approach allows for a model-independent cross-check of the long-standing DAMA/LIBRA signal claim with a moderate exposure of a few hundred kg d, while completely avoiding key systematic uncertainties inherent to scintillation-only NaI-based searches. COSINUS built and commissioned a dedicated low-background cryogenic facility at the LNGS underground laboratories. Data taking with eight NaI detector modules (COSINUS-1π Run1) is planned to begin in 2026.