Search for a Dark Matter-Induced Annual Modulation Signal in NaI(Tl) with the COSINE-100 Experiment

Adhikari, G.; Adhikari, P.; Souza, E. Barbosa de; Carlin, N.; Choi, S.; Djamal, Mitra; Ezeribe, A. C.; Ha, C.; Hahn, I. S.; Jeon, E. J.; Jo, J. H.; Joo, H. W.; Kang, W. G.; Kauer, M.; Kim, G. S.; Kim, H.; Kim, H. J.; Kim, K. W.; Kim, N. Y.; Kim, S. K.; Kim, Y. D.; Kim, Y. H.; Ko, Y. J.; Kudryavtsev, V. A.; Lee, H. S.; Lee, J.; Lee, J. Y.; Lee, M. H.; Leonard, D. S.; Lynch, W.; Maruyama, R.; Mouton, F.; Olsen, S. L.; Park, B. J.; Park, H. K.; Park, H. S.; Park, K. S.; Pitta, R. L. C.; Prihtiadi, H.; Ra, S. J.; Rott, C.; Shin, K. A.; Scarff, A.; Spooner, N. J. C.; Thompson, W. G.; Yang, L.; Yu, G. H.

doi:10.1103/physrevlett.123.031302

Cited by 129 publications

(137 citation statements)

References 46 publications

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“…These include DM-Ice [167], KIMS [168], SABRE [169], Cosine [170,171] and ANAIS [172,173]. We do not provide a detailed fit to the DAMA/LIBRA data but instead focus our discussion on the general features introduced by the Dark Shards.…”

Section: A Modulation Signalsmentioning

confidence: 99%

“…Although there is difficulty in explaining this signal with galactic DM while remaining consistent with other experiments, the signal does have many of the properties expected from galactic DM. ANAIS [172,173] and Cosine [170,171] have released first results and do not observe a statistically significant modulation, but they still require a few years of exposure to definitively test the DAMA/LIBRA result.…”

Section: A Modulation Signalsmentioning

confidence: 99%

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Velocity substructure from Gaia and direct searches for dark matter

et al. 2020

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Data from the Gaia satellite show that the solar neighbourhood of the Milky Way's stellar halo is imprinted with substructure from several accretion events. Evidence of these events is found in "the Shards", stars clustering with high significance in both action space and metallicity. Stars in the Shards share a common origin, likely as ancient satellite galaxies of the Milky Way, so will be embedded in dark matter (DM) counterparts. These "Dark Shards" contain two substantial streams (S1 and S2), as well as several retrograde, prograde and lower energy objects. The retrograde stream S1 has a very high Earth-frame speed of ∼ 550 km s −1 while S2 moves on a prograde, but highly polar orbit and enhances peak of the speed distribution at around 300 km s −1 . The presence of the Dark Shards locally leads to modifications of many to the fundamental properties of experimental DM signals. The S2 stream in particular gives rise to an array of effects in searches for axions and in the time dependence of nuclear recoils: shifting the peak day, inducing non-sinusoidal distortions, and increasing the importance of the gravitational focusing of DM by the Sun. Dark Shards additionally bring new features for directional signals, while also enhancing the DM flux towards Cygnus.

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Section: A Modulation Signalsmentioning

confidence: 99%

Section: A Modulation Signalsmentioning

confidence: 99%

Velocity substructure from Gaia and direct searches for dark matter

et al. 2020

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“…An analysis of the first 59.5 live days using about 61 kg effective mass allowed the COSINE collaboration to exclude the 3σ DAMA/LIBRA region at 90% C.L. in a model dependent way [10], and the annual modulation analysis of 1.7 years, with a total exposure of 97.7 kg×y, recently published is compatible at 1σ both with DAMA/LIBRA signal and with the absence of modulation [16].…”

Section: Introductionmentioning

confidence: 99%

ANAIS-112 status: two years results on annual modulation

Amaré

Cebrián

Cintas

et al. 2020

J. Phys.: Conf. Ser.

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ANAIS (Annual modulation with NaI Scintillators) is a dark matter direct detection experiment located at the Canfranc Underground Laboratory (LSC), in Spain. The goal is to confirm or refute in a model independent way the DAMA/LIBRA positive result: an annual modulation in the low-energy detection rate compatible with the expected signal induced by dark matter particles in the galactic halo. This signal, observed for about 20 years, is in strong tension with the negative results of other very sensitive experiments, but a direct comparison using the same target material, NaI(Tl), was still lacking. ANAIS-112, consisting of 112.5 kg of NaI(Tl) scintillators, is taking data at the LSC since August 2017. Here we present the preliminary annual modulation analysis corresponding to two years of data (exposure of 220.69 kg×y) and the ANAIS-112 projected sensitivity for the scheduled 5 y of operation.

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“…From the first 59.5 days of data they have excluded DAMA/LIBRA signal as due to Spin-Independent (SI) WIMPs with a standard halo model [17]. The first annual modulation analysis corresponding to 1.7 years of data has been presented [18]; total exposure analyzed is 97.79 kg·y as three large crystals were excluded due to low light yield and excessive PMT noise. The best fit modulation amplitude derived for the 2-6 keV ee region is S m = (0.0083 ± 0.0068) cpd/kg/keV.…”

Section: Annual Modulationmentioning

confidence: 99%

“…Figure 1 compares the modulation amplitudes derived by DAMA/LIBRA, COSINE-100 and ANAIS-112 experiments. , COSINE-100 [18] and ANAIS-112 [23] experiments in the energy regions of 1-6 keV ee and 2-6 keV ee .…”

Section: Annual Modulationmentioning

confidence: 99%

Small scale direct dark matter search experiments

Cebrián

2020

J. Phys.: Conf. Ser.

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Experiments based on noble liquids and solid state cryogenic detectors have had a leading role in the direct detection of dark matter. But smaller scale projects can help to explore the new dark matter landscape with advanced, ultra-sensitive detectors based on recently developed technologies. Here, the physics case of different types of small scale dark matter experiments will be presented and many of them will be reviewed, highlighting the detection techniques and summarizing their properties, results and status.

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Search for a Dark Matter-Induced Annual Modulation Signal in NaI(Tl) with the COSINE-100 Experiment

Cited by 129 publications

References 46 publications

Velocity substructure from Gaia and direct searches for dark matter

Velocity substructure from Gaia and direct searches for dark matter

ANAIS-112 status: two years results on annual modulation

Small scale direct dark matter search experiments

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