Abstract
Abstract We perform an independent search for sinusoidal-based modulation in the recently released ANAIS-112 data, which could be induced by dark matter scatterings. We then evaluate this hypothesis against the null hypothesis that the data contain only background, using four different model comparison techniques. These include frequentist, Bayesian, and two information theory-based criteria (Akaike and Bayesian information criteria). This analysis was done on both the residual data (by subtracting the exponential fit obtained from the ANAIS-112 Collaboration) as well as the total (non-background subtracted) data. We find that according to the Bayesian model comparison test, the null hypothesis of no modulation is decisively favored over a cosine-based annual modulation for the non-background subtracted dataset in the 2–6 keV energy range. None of the other model comparison tests decisively favor any one hypothesis over another. This is the first application of Bayesian and information theory techniques to test the annual modulation hypothesis in ANAIS-112 data, extending our previous work on the DAMA/LIBRA and COSINE-100 data. Our analysis codes have also been made publicly available.
Highlights
The ANAIS collaboration [1] (A19, hereafter) recently released their first scientific results, related to testing the long-standing DAMA claim of annual modulation caused by dark matter scatterings [2]
The ANAIS-112 dark matter direct detection experiment consisting of 112.5 kg of NaI, which has been designed to test the long-standing DAMA annual modulation claim, recently released their first results using 1.5 years of data, having a total exposure of 157.55 kg year [1]
This data was found by the collaboration to be consistent with the null hypothesis of no annual modulation
Summary
The ANAIS collaboration [1] (A19, hereafter) recently released their first scientific results, related to testing the long-standing DAMA claim of annual modulation caused by dark matter scatterings [2] (and references therein). Their target material consists of 112.5 kg of NaI ( the experiment has been named ANAIS-112) and the total lifetime of the data released in 2019 was 1.5 years. We have made our analysis codes publicly available and they can be found at https://github.com/aditikrishak/ANAIS112_analysis
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
