Annual modulation of dark matter: The ANAIS-112 case

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

doi:10.48550/arxiv.1704.06861

Cited by 7 publications

(10 citation statements)

References 22 publications

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“…The prospects of ANAIS-112 for the identification of an annual modulation signal have been evaluated in [11] in terms of the a priori critical and detection limits of the experiment. The analysis is based on the detector response and the background level measured for the first Figure 5.…”

Section: Sensitivity Prospectsmentioning

confidence: 99%

“…Annual modulation sensitivity prospects for ANAIS-112 after 5 years of measurement, as evaluated in [11]. modules operated in Canfranc.…”

Section: Sensitivity Prospectsmentioning

confidence: 99%

“…In particular, an average background (corrected for the cut efficiency) has been estimated in the regions of interest and five years of data taking have been assumed. Considering the variance of the estimator of the modulated amplitude, it is shown [11] that ANAIS-112 in 2-6 keV ee has a detection limit for a model-independent annual modulation (not related to a dark matter origin) below the measured amplitude by DAMA/LIBRA [1]. As it can be seen in figure 5 (taken from [11]), under the dark matter hypothesis, for a detection limit at 90% C.L.…”

Section: Sensitivity Prospectsmentioning

confidence: 99%

“…Considering the variance of the estimator of the modulated amplitude, it is shown [11] that ANAIS-112 in 2-6 keV ee has a detection limit for a model-independent annual modulation (not related to a dark matter origin) below the measured amplitude by DAMA/LIBRA [1]. As it can be seen in figure 5 (taken from [11]), under the dark matter hypothesis, for a detection limit at 90% C.L. and a critical limit at 90% C.L., ANAIS-112 can detect the annual modulation in the 3σ region compatible with the DAMA/LIBRA result.…”

Section: Sensitivity Prospectsmentioning

confidence: 99%

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The ANAIS-112 experiment at the Canfranc Underground Laboratory

Amaré¹,

Cebrián

Coarasa³

et al. 2020

J. Phys.: Conf. Ser.

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The ANAIS experiment aims at the confirmation of the DAMA/LIBRA signal at the Canfranc Underground Laboratory (LSC). Several 12.5 kg NaI(Tl) modules produced by Alpha Spectra Inc. have been operated there during the last years in various set-ups; an outstanding light collection at the level of 15 photoelectrons per keV, which allows triggering at 1 keV of visible energy, has been measured for all of them and a complete characterization of their background has been achieved. In the first months of 2017, the full ANAIS-112 set-up consisting of nine Alpha Spectra detectors with a total mass of 112.5 kg was commissioned at LSC and the first dark matter run started in August, 2017. Here, the latest results on the detectors performance and measured background from the commissioning run will be presented and the sensitivity prospects of the ANAIS-112 experiment will be discussed.

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Section: Sensitivity Prospectsmentioning

confidence: 99%

“…Annual modulation sensitivity prospects for ANAIS-112 after 5 years of measurement, as evaluated in [11]. modules operated in Canfranc.…”

Section: Sensitivity Prospectsmentioning

confidence: 99%

Section: Sensitivity Prospectsmentioning

confidence: 99%

Section: Sensitivity Prospectsmentioning

confidence: 99%

See 2 more Smart Citations

The ANAIS-112 experiment at the Canfranc Underground Laboratory

Amaré¹,

Cebrián

Coarasa³

et al. 2020

J. Phys.: Conf. Ser.

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“…Thus, only an experiment also based on NaI may bring forward the ultimate = model-independent clarification. Several experiments are committed to this task, ANAIS [4], COSINE [5], DM-Ice [6], SABRE [7], which share with DAMA the principle signal: Scintillation light produced in the Tl-doped NaI target crystals measured with PMTs. In this contribution we discuss results from the COSINUS (Cryogenic Observatory for SIgnals seen in Next-generation Underground Searches) project aiming to operate NaI as cryogenic calorimeter [8].…”

Section: Introductionmentioning

confidence: 99%

Results of the first NaI scintillating calorimeter prototypes by COSINUS

Reindl

Angloher

Carniti

et al. 2020

J. Phys.: Conf. Ser.

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Over almost three decades the TAUP conference has seen a remarkable momentum gain in direct dark matter search. An important accelerator were first indications for a modulating signal rate in the DAMA/NaI experiment (today DAMA/LIBRA) reported in 1997. Today the presence of an annual modulation observed by DAMA, which matches in period and phase the expectation for dark matter, is doubtless and supported at > 9σ confidence. Despite the positive evidence from the DAMA experiment the underlying nature of dark matter is still considered an open and fundamental question of nowadays particle physics. No other direct dark matter search experiment could confirm the DAMA claim up to now; moreover, numerous null-results are in clear contradiction with DAMA under so-called standard assumptions for the dark matter halo and the interaction mechanism of dark with ordinary matter. As both bear a dependence on the target material, resolving this controversial situation will convincingly only be possible with an experiment using sodium iodide (NaI) as target, just like DAMA. COSINUS aims to even go a step further by combining NaI with a novel detection approach. DAMA and all other NaI experiments solely measure the scintillation light created by a particle interaction in the NaI crystal. COSINUS aims to operate NaI as a cryogenic calorimeter reading scintillation light and phonon/heat signal. Two distinct advantages arise from this approach, a substantially lower energy threshold for nuclear recoils and particle identification on an event-by-event basis.These key benefits will allow COSINUS to clarify a possible nuclear recoil origin of the DAMA signal with comparatively little exposure of O(100kg days) and, thereby, answer a long-standing question of particle physics. Today COSINUS is in R&D phase; in this contribution we show results from the 2nd prototype, albeit the first one of the final foreseen detector design. The key finding of this measurement is that pure, undoped NaI is a truly excellent scintillator at low temperatures: We measure 13.1% of the total deposited energy in the NaI crystal in the form of scintillation light (in the light detector).

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Study of cosmogenic radionuclides in the COSINE-100 NaI(Tl) detectors

Souza

Park

Adhikari

et al. 2020

Astroparticle Physics

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COSINE-100 is a direct detection dark matter search experiment that uses a 106 kg array of eight NaI(Tl) crystals that are kept underground at the Yangyang Underground Laboratory to avoid cosmogenic activation of radioisotopes by cosmic rays. Even though the cosmogenic activity is declining with time, there are still significant background rates from the remnant nuclides. In this paper, we report measurements of cosmogenic isotope contaminations with less than one year half-lives that are based on extrapolations of the time dependent activities of their characteristic energy peaks to activity rates at the time the crystals were deployed underground. For longer-lived 109 Cd (T 1/2 = 1.6 y) and 22 Na (T 1/2 = 2.6 y), we investigate time correlations of characteristic γ/X-ray peaks. The inferred sea-level production rates are compared with caluclations based on the ACTIVIA and MENDL-2 model calculations and experimental data. For 3 H, which has a long, 12.3 year half-life, we evaluated the activity levels from the exposure times and determined a cosmogenic activation rate that is consistent with other measurements.

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Annual modulation of dark matter: The ANAIS-112 case

Cited by 7 publications

References 22 publications

The ANAIS-112 experiment at the Canfranc Underground Laboratory

The ANAIS-112 experiment at the Canfranc Underground Laboratory

Results of the first NaI scintillating calorimeter prototypes by COSINUS

Study of cosmogenic radionuclides in the COSINE-100 NaI(Tl) detectors

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