Results from the first use of low radioactivity argon in a dark matter search

Agnes, P.; Agostino, L.; Albuquerque, I. F. M.; Alexander, T.; Alton, A.; Arisaka, K.; Back, H. O.; Baldin, B.; Biery, K.; Bonfini, G.; Bossa, M.; Bottino, B.; Brigatti, A.; Brodsky, J.; Budano, F.; Bussino, S.; Cadeddu, M.; Cadonati, L.; Cadoni, Mariano; Calaprice, F.; Canci, N.; Candela, A.; Cao, Hua; Cariello, M.; Carlini, M.; Catalanotti, S.; Cavalcante, P.; Chepurnov, A.; Cocco, A. G.; Covone, G.; Crippa, Luca; D’Angelo, D.; D’Incecco, M.; Davini, S.; Cecco, S. De; Deo, M. De; Vincenzi, M. De; Derbin, A.; Devoto, A.; Eusanio, F. Di; Pietro, G. Di; Edkins, E.; Empl, A.; Fan, A.; Fiorillo, G.; Fomenko, K.; Forster, G.; Franco, D.; Gabriele, F.; Galbiati, C.; Giganti, C.; Goretti, A.; Granato, F.; Grandi, L.; Gromov, M.; Guan, Mengyun; Guardincerri, Y.; Hackett, B. R.; Herner, K.; Hungerford, E.; Ianni, A.; Ianni, An.; James, I.; Jollet, C.; Keeter, K. J.; Kendziora, C. L.; Kobychev, V.; Koh, G.; Korablëv, D.; Korga, G.; Kubankin, A. S.; Li, X.; Lissia, M.; Lombardi, P.; Luitz, S.; Ma, Y.; Machulin, I.; Mandarano, A.; Mari, Stefano Maria; Maricic, J.; Marini, L.; Martoff, C. J.; Meregaglia, A.; Meyers, P. D.; Miletic, T.; Milinčić, R.; Montanari, D.; Monte, A.; Montuschi, M.; Monzani, M. E.; Mosteiro, P.; Mount, B. J.; Muratova, V.; Musico, P.; Napolitano, J.; Nelson, A.; Odrowski, S.; Orsini, M.; Ortica, F.; Pagani, L.; Pallavicini, M.; Pantic, E.; Parmeggiano, S.; Pelczar, K.; Pelliccia, N.; Perasso, S.; Pocar, A.; Pordes, S.; Pugachev, D. A.; Qian, Hao; Randle, K.; Ranucci, G.; Razeto, A.; Reinhold, B.; Renshaw, A.; Romani, A.; Rossi, B.; Rossi, N.; Rountree, S. D.; Sablone, D.; Saggese, Paolo; Saldanha, R.; Sands, W.; Sangiorgio, S.; Savarese, C.; Segreto, E.; Semenov, D.; Shields, E.; Singh, Prabhjot; Skorokhvatov, M.; Smirnov, O.; Sotnikov, A.; Stanford, C.; Suvorov, Y.; Tartaglia, R.; Tatarowicz, J.; Testera, G.; Tonazzo, A.; Trinchese, P.; Unzhakov, E.; Vishneva, A.; Vogelaar, B.; Wada, M.; Walker, Susan; Wang, H.; Wang, Y.; Watson, A.; Westerdale, S.; Wilhelmi, J.; Wojcik, Mariusz; Xiang, X.; Xu, J.; Yang, Changgen; Yoo, J.; Zavatarelli, S.; Zec, A.; Zhong, Weili; Zhu, C.; Zuzel, G.

doi:10.1103/physrevd.93.081101

Cited by 174 publications

(247 citation statements)

References 56 publications

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“…Observed limit in black, with the 1-and 2-σ ranges of background-only trials shaded green and yellow. Also shown are limits from the first LUX analysis [6] (gray), SuperCDMS [40] (green), CDMSlite [41] (light blue), XENON100 [42] (red), DarkSide-50 [43] (orange), and PandaX [44] (purple). The expected spectrum of coherent neutrino-nucleus scattering by 8 B solar neutrinos can be fit by a WIMP model as in [45], plotted here as a black dot.…”

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confidence: 99%

Improved Limits on Scattering of Weakly Interacting Massive Particles from Reanalysis of 2013 LUX Data

Akerib¹,

Araújo²,

Bai³

et al. 2016

Phys. Rev. Lett.

408

626

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We present constraints on weakly interacting massive particles (WIMP)-nucleus scattering from the 2013 data of the Large Underground Xenon dark matter experiment, including 1.4 × 10 4 kg day of search exposure. This new analysis incorporates several advances: single-photon calibration at the scintillation wavelength, improved event-reconstruction algorithms, a revised background model including events originating on the detector walls in an enlarged fiducial volume, and new calibrations from decays of an injected tritium β source and from kinematically constrained nuclear recoils down to 1.1 keV. Sensitivity, especially to low-mass WIMPs, is enhanced compared to our previous results which modeled the signal only above a 3 keV minimum energy. Under standard dark matter halo assumptions and in the mass range above 4 GeV c −2 , these new results give the arXiv:1512.03506v3 [astro-ph.CO]

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mentioning

confidence: 99%

Improved Limits on Scattering of Weakly Interacting Massive Particles from Reanalysis of 2013 LUX Data

Akerib¹,

Araújo²,

Bai³

et al. 2016

Phys. Rev. Lett.

408

626

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“…In this context, the strongest limits on SI cross section, for m DM 10 GeV, are given by xenon target experiments, the leader being currently the XENON1T experiment [88]. 1 Argon target experiments, such as DarkSide-50 [90], give limits which are two orders of magnitude weaker.…”

Section: Direct Detectionmentioning

confidence: 99%

Robustness of dark matter constraints and interplay with collider searches for New Physics

Arbey

Robbins

Mahmoudi

et al. 2017

J. High Energ. Phys.

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Abstract:We study the implications of dark matter searches, together with collider constraints, on the phenomenological MSSM with neutralino dark matter and focus on the consequences of the related uncertainties in some detail. We consider, inter alia, the latest results from AMS-02, Fermi-LAT and XENON1T. In particular, we examine the impact of the choice of the dark matter halo profile, as well as the propagation model for cosmic rays, for dark matter indirect detection and show that the constraints on the MSSM differ by one to two orders of magnitude depending on the astrophysical hypotheses. On the other hand, our limited knowledge of the local relic density in the vicinity of the Earth and the velocity of Earth in the dark matter halo leads to a factor 3 in the exclusion limits obtained by direct detection experiments. We identified the astrophysical models leading to the most conservative and the most stringent constraints and for each case studied the complementarities with the latest LHC measurements and limits from Higgs, SUSY and monojet searches. We show that combining all data from dark matter searches and colliders, a large fraction of our supersymmetric sample could be probed. Whereas the direct detection constraints are rather robust under the astrophysical assumptions, the uncertainties related to indirect detection can have an important impact on the number of the excluded points.

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“…Some noble liquid detectors also apply an electrical field and collect both scintillation light and ionization charge. These exepriments include LUX [22], XENON100 [23], Darkside [24].…”

Section: The Wimp Recoil Energy Spectrummentioning

confidence: 99%

“…This striking coincidence has brought great motivation to assume the lightest stable particle at the electroweak scale to be the dark matter. The WIMP models have been studied with extensive theoretical work, and have led to a tremendous experimental effort in last two decades to detect these WIMPs [19][20][21][22][23][24][25][26][27] …”

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confidence: 99%

High-Energy Neutron Backgrounds for Underground Dark Matter Experiments

Chen¹

2016

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A B S T R A C TDirect dark matter detection experiments usually have excellent capability to distinguish nuclear recoils, expected interactions with Weakly Interacting Massive Particle (WIMP) dark matter, and electronic recoils, so that they can efficiently reject background events such as gamma-rays and charged particles. However, both WIMPs and neutrons can induce nuclear recoils. Neutrons are then the most crucial background for direct dark matter detection. It is important to understand and account for all sources of neutron backgrounds when claiming a discovery of dark matter detection or reporting limits on the WIMP-nucleon cross section. One type of neutron background that is not well understood is the cosmogenic neutrons from muons interacting with the underground cavern rock and materials surrounding a dark matter detector.The Neutron Multiplicity Meter (NMM) is a water Cherenkov detector capable of measuring the cosmogenic neutron flux at the Soudan Underground Laboratory, which has an overburden of 2090 meters water equivalent. The NMM consists of two 2.2-tonne gadolinium-doped water tanks situated atop a 20-tonne lead target. It detects a high-energy (>∼ 50 MeV) neutron via moderation and capture of the multiple secondary neutrons released when the former interacts in the lead target. The multiplicity of secondary neutrons for the high-energy neutron provides a benchmark for comparison to the current Monte Carlo predictions. Combining with the Monte Carlo simulation, the muon-induced high-energy neutron flux above 50 MeV is measured to be (1.3 ± 0.2) × 10 −9 cm −2 s −1 , in reasonable agreement with the model prediction. The measured multiplicity spectrum agrees well with that of Monte Carlo simulation for multiplicity below 10, but shows an excess of approximately a factor of three over Monte Carlo prediction for multiplicities ∼ 10 − 20.In an effort to reduce neutron backgrounds for the dark matter experiment SuperCDMS SNO-LAB, an active neutron veto was developed. It is estimated that the current design of the neutron veto with a 40 cm thick layer of boron-doped liquid scintillator can achieve a > 90% efficiency for tagging the single-scatter neutrons. In addition, a one-quarter scale prototype detector for neutron veto has been built and tested. H I G H -E N E R G Y N E U T R O N B A C K G R O U N D S F O R U N D E R G R O U N D D A R K M A T T E R E X P E R I M E N T S Y U C H E N B . S . , B E I J I N G I N S T I T U T E O F T E C H N O L O G Y , B E I J I N G , C H I N A ( 2 0 0 6 ) M . S . , B E I J I N G N O R M A L U N I V E R S I T Y , B E I J I N G , C H I N A ( 2 0 0 9 ) D I S S E R T A T I O N S U B M I T T E D I N P A R T I A L F U L F I L L M E N T O F T H E R E Q U I R E M E N T S F O R T H E D E G R E E O F D O C T O R O F P H I L O S O P H Y I N P H Y S I C S S Y R A C U S E U N I V E R S I T Y D E C E M B E Dark MatterThere is compelling evidence for the existence of dark matter from astronomical and cosmological observations. In this chater, I will briefly present modern cos...

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Results from the first use of low radioactivity argon in a dark matter search

Cited by 174 publications

References 56 publications

Improved Limits on Scattering of Weakly Interacting Massive Particles from Reanalysis of 2013 LUX Data

Improved Limits on Scattering of Weakly Interacting Massive Particles from Reanalysis of 2013 LUX Data

Robustness of dark matter constraints and interplay with collider searches for New Physics

High-Energy Neutron Backgrounds for Underground Dark Matter Experiments

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