Related Experiment Video
Updated: Jan 16, 2026

Setting Limits on Supersymmetry Using Simplified Models
Published on: November 15, 2013
Combined Annual Modulation Dark Matter Search with COSINE-100 and ANAIS-112.
N Carlin1, J Y Cho2, J J Choi3
1Physics Institute, University of São Paulo, 05508-090, São Paulo, Brazil.
The COSINE-100 and ANAIS-112 experiments searched for dark matter signals using sodium-iodide detectors. Their combined data show no evidence for the annual modulation signal reported by DAMA/LIBRA, excluding it at a high statistical significance.
Area of Science:
- Particle Physics
- Astroparticle Physics
- Dark Matter Research
Background:
- The DAMA/LIBRA experiment has reported an annual modulation signal consistent with dark matter for over two decades using a sodium-iodide detector.
- Independent verification is crucial to confirm or refute this long-standing claim.
- COSINE-100 and ANAIS-112 were designed to directly test the DAMA/LIBRA signal using identical target materials.
Purpose of the Study:
- To directly test the DAMA/LIBRA dark matter annual modulation signal.
- To analyze data from the COSINE-100 and ANAIS-112 experiments, which use the same target material as DAMA/LIBRA.
- To search for annual modulation in the combined datasets of COSINE-100 and ANAIS-112.
Main Methods:
- Utilized data from the COSINE-100 (South Korea) and ANAIS-112 (Spain) experiments, with three years of data each.
- Employed a Markov Chain Monte Carlo method for analyzing the annual modulation amplitude.
- Combined the results from both experiments to increase statistical power.
Main Results:
- Individual analyses of COSINE-100 and ANAIS-112 data showed no significant annual modulation, yielding best fit amplitudes incompatible with DAMA/LIBRA's findings at 3.7σ and 2.6σ.
- The combined 6-year dataset from both experiments found modulation amplitudes consistent with no modulation.
- The DAMA/LIBRA signal was excluded by the combined data with 4.7σ and 3.5σ significance in the 1-6 keV and 2-6 keV energy regions, respectively.
Conclusions:
- The results from COSINE-100 and ANAIS-112 do not support the DAMA/LIBRA claim of a dark matter annual modulation signal.
- The combined analysis provides strong evidence against the DAMA/LIBRA signal, excluding it as the source of the observed modulation.
- Further investigation with more data will continue to refine these findings in the search for dark matter.
More Related Videos
09:24Automated Sample Multiplexing by using Combined Precursor Isotopic Labeling and Isobaric Tagging cPILOT
Published on: December 18, 2020
10:32Sample Preparation and Transfer Protocol for In-Vacuum Long-Wavelength Crystallography on Beamline I23 at Diamond Light Source
Published on: April 23, 2021
Related Concept Videos
Reduced Mass Coordinates: Isolated Two-body Problem
Detection of Black Holes
Their closest cousins are neutron stars, which are composed almost entirely of neutrons packed against each other, making them extremely dense. A neutron star has the same mass as the Sun but its diameter is only a few kilometers. Therefore, the escape velocity from their surface is close to the speed of light.
Not until the 1960s, when the first neutron...
Area Computation by the Alternative Coordinate Method
Thomson's e/m Experiment
A particle with charge q, speed v, and mass m enters an area from the top, where the magnetic and electric fields are perpendicular both to the particle's motion and to one another. The magnetic...