COSINE-100 Full Dataset Challenges the Annual Modulation Signal of DAMA/LIBRA

Abstract

For over 25 years, the DAMA/LIBRA collaboration has claimed to observe an annual modulation signal, suggesting the existence of dark matter interactions. However, no experiment employing different target materials has observed a dark matter signal consistent with their result. To address this puzzle, the COSINE-100 collaboration conducted a model-independent test using sodium iodide crystal detectors, the same target material as DAMA/LIBRA. Analyzing data collected over 6.4 years by the effective mass of 61.3 kg, with improved energy calibration and time-dependent background modeling, we found no evidence of an annual modulation signal, challenging the DAMA/LIBRA result with a confidence level greater than 3$\sigma$. This finding represents a substantial step toward resolving the long-standing debate surrounding DAMA/LIBRA's dark matter claim, indicating that the observed modulation is unlikely to be caused by dark matter interactions.

References in corpus (25)

• First Dark Matter Search Results from the LUX-ZEPLIN (LZ) Experiment
• Dark Matter Search Results from the PandaX-4T Commissioning Run
• First Dark Matter Search with Nuclear Recoils from the XENONnT Experiment
• The DAMA/LIBRA apparatus
• Dark Matter Search Results from the Complete Exposure of the PICO-60 C${}_3$F${}_8$ Bubble Chamber
• First results on dark matter annual modulation from ANAIS-112 experiment
• An experiment to search for dark matter interactions using sodium iodide detectors
• Annual modulation results from three-year exposure of ANAIS-112
• Tests on NaI(Tl) crystals for WIMP search at the Yangyang Underground Laboratory
• Search for Electronic Recoil Event Rate Modulation with 4 Years of XENON100 Data
• Strong constraints from COSINE-100 on the DAMA dark matter results using the same sodium iodide target
• Three-year annual modulation search with COSINE-100
• An induced annual modulation signature in COSINE-100 data by DAMA/LIBRA's analysis method
• High sensitivity characterization of an ultra-high purity NaI(Tl) crystal scintillator with the SABRE proof-of-principle detector
• Deep-underground dark matter search with a COSINUS detector prototype
• Search for Boosted Dark Matter in COSINE-100
• Construction of Yemilab
• Nonproportionality of NaI(Tl) Scintillation Detector for Dark Matter Search Experiments
• Upgrading the COSINE-100 Experiment for Enhanced Sensitivity to Low-Mass Dark Matter Detection
• The environmental monitoring system at the COSINE-100 experiment
• Study on NaI(Tl) crystal at -35 C for dark matter detection
• Waveform Simulation for Scintillation Characteristics of NaI(Tl) Crystal
• Upgrade of NaI(Tl) crystal encapsulation for the NEON experiment
• Lowering threshold of NaI(Tl) scintillator to 0.7 keV in the COSINE-100 experiment
• Alpha backgrounds in NaI(Tl) crystals of COSINE-100

Cited by in corpus (3)

• Validation of the COSINE-100U NaI(Tl) Encapsulation for Low-Temperature Operation in Liquid Scintillator
• Search for Annual Modulation in Combined ANAIS 112 and COSINE 100 Data using Bayesian Model Comparison
• Constraints on sub-GeV dark matter scattering on electrons with COSINE-100