ANAIS-112 status: two years results on annual modulation

Amaré, J.; Cebrián, S.; Cintas, D.; Coarasa, I.; Garcı́a, E.; Martínez, M.; Oliván, M. A.; Ortigoza, Y.; Solórzano, A. Ortíz de; Puimedón, J.; Salinas, A.; Sarsa, M.L.; Villar, P.

doi:10.1088/1742-6596/1468/1/012014

Cited by 25 publications

(29 citation statements)

References 26 publications

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“…The reported data are consistent with the null hypothesis of no modulation [145]. This has been extended [97] to two years of data, equivalent to 220.69 [kg yr] exposure, and achieves an annual modulation best fit in the 2-6 keV ee range of S m = −0.0029 ± 0.0050 [kg keV day] −1 (S m = −0.0036 ± 0.0054 [kg keV day] −1 in 1-6 keV ee range) again, consistent with no modulation. Overall, ANAIS currently reports [97] a 2.6σ incompatibility with the DAMA result and is on track to achieve the aimed for 3σ test of DAMA within three years.…”

Section: Anaissupporting

confidence: 87%

Annual modulation in direct dark matter searches

Froborg

Duffy

2020

J. Phys. G: Nucl. Part. Phys.

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The measurement of an annual modulation in the event rate of direct dark matter detection experiments is a powerful tool for dark matter discovery. Indeed, several experiments have already claimed such a discovery in the past decade. While most of them have later revoked their conclusions, and others have found potentially contradictory results, one still stands today. This paper explains the potential as well as the challenges of annual modulation measurements, and gives an overview on past, present and future direct detection experiments.

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Section: Anaissupporting

confidence: 87%

Annual modulation in direct dark matter searches

Froborg

Duffy

2020

J. Phys. G: Nucl. Part. Phys.

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“…The upgraded DAMA/LIBRA detector confirmed the earlier result of DAMA/NaI, collecting more data and reaching a significance of about 13 σ (loosely speaking) for the cumulative exposure [1][2][3][4][5][6]. The ANAIS [7][8][9] and COSINE [10][11][12] experiments employ NaI crystals like DAMA, and are also looking for an annual modulation in the counting rate. So far they have not reported any modulation, but their sensitivity is not yet sufficient to probe the DAMA signal [12,13].…”

Section: Introductionmentioning

confidence: 54%

Annual modulations from secular variations: relaxing DAMA?

Buttazzo

Panci

Rossi

et al. 2020

J. High Energ. Phys.

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The DAMA collaboration reported an annually modulated rate with a phase compatible with a Dark Matter induced signal. We point out that a slowly varying rate can bias or even simulate an annual modulation if data are analyzed in terms of residuals computed by subtracting approximately yearly averages starting from a fixed date, rather than a background continuous in time. In the most extreme case, the amplitude and phase of the annual modulation reported by DAMA could be alternatively interpreted as a decennial growth of the rate. This possibility appears mildly disfavoured by a detailed study of the available data, but cannot be safely excluded. In general, a decreasing or increasing rate could partially reduce or enhance a true annual modulation, respectively. The issue could be clarified by looking at the full time-dependence of the DAMA total rate, not explicitly published so far.

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“…First results from an annual modulation analysis were published considering the first 1.5 years, corresponding to an exposure of 157.55 kg•y [59]. Updated results were presented for 2 years (with a total exposure of 220.69 kg•y) applying the same analysis methods [60]. The analysis of the first 3 years of data (corresponding to 313.95 kg•y) has been released, being the modulation amplitudes from best fits obtained S m = (−0.0034 ± 0.0042) c/keV/kg/d for the 1-6 keV ee region and S m = (0.0003 ± 0.0037) c/keV/kg/d in 2-6 keV ee [61]; this supports the absence of modulation in the data and the values are incompatible with DAMA/LIBRA result at 3.3 (2.6) σ in the 1-6 keV ee (2-6 keV ee ) windows, for a sensitivity of 2.5 (2.7) σ.…”

Section: Annual Modulation Effectmentioning

confidence: 99%

The Role of Small Scale Experiments in the Direct Detection of Dark Matter

Cebrián

2021

Universe

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In the direct detection of the galactic dark matter, experiments using cryogenic solid-state detectors or noble liquids play for years a very relevant role, with increasing target mass and more and more complex detection systems. But smaller projects, based on very sensitive, advanced detectors following new technologies, could help in the exploration of the different proposed dark matter scenarios too. There are experiments focused on the observation of distinctive signatures of dark matter, like an annual modulation of the interaction rates or the directionality of the signal; other ones are intended to specifically investigate low mass dark matter candidates or particular interactions. For this kind of dark matter experiments at small scale, the physics case will be discussed and selected projects will be described, summarizing the basics of their detection methods and presenting their present status, recent results and prospects.

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ANAIS-112 status: two years results on annual modulation

Cited by 25 publications

References 26 publications

Annual modulation in direct dark matter searches

Annual modulation in direct dark matter searches

Annual modulations from secular variations: relaxing DAMA?

The Role of Small Scale Experiments in the Direct Detection of Dark Matter

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