Lowering the radioactivity of the photomultiplier tubes for the XENON1T dark matter experiment

Aprile, E.; Agostini, F.; Alfonsi, M.; Arazi, L.; Arisaka, K.; Arneodo, F.; Auger, M.; Bălan, C.; Barrow, Peter; Baudis, L.; Bauermeister, B.; Behrens, A.; Beltrame, P.; Brown, A.; Brown, E.; Bruenner, S.; Bruno, G.; Budnik, R.; Bütikofer, L.; Cardoso, J. M. R.; Coderre, D.; Colijn, A. P.; Contreras, H.; Cussonneau, J. P.; Decowski, M. P.; Giovanni, A. Di; Duchovni, E.; Fattori, S.; Ferella, A. D.; Fieguth, A.; Fulgione, W.; Galloway, M.; Garbini, M.; Geis, C.; Goetzke, L. W.; Grignon, C.; Gross, E.; Hampel, W.; Itay, R.; Kaether, F.; Kessler, G.; Kish, A.; Landsman, H.; Lang, R. F.; Calloch, M. Le; Lellouch, D.; Levinson, L. J.; Lévy, C.; Lindemann, S.; Lindner, M.; Lopes, J. A. M.; Lyashenko, A.; MacMullin, S.; Undagoitia, T. Marrodán; Masbou, J.; Massoli, F. V.; Mayani, D.; Fernandez, A. J. Melgarejo; Meng, Y.; Messina, M.; Miguez, B.; Molinario, A.; Murra, M.; Naganoma, J.; Oberlack, U.; Orrigo, S. E. A.; Pakarha, P.; Pantic, E.; Persiani, R.; Piastra, F.; Pienaar, J.; Plante, G.; Priel, N.; Rauch, L.; Reichard, S.; Reuter, C.; Rizzo, A.; Rosendahl, S. S.E.; Santos, J.M.F. dos; Sartorelli, G.; Schindler, S. M.; Schreiner, J.; Schümann, M.; Lavina, L. Scotto; Selvi, M.; Shagin, P.; Simgen, H.; Teymourian, A.; Thers, D.; Tiseni, A.; Trinchero, G.; Tunnell, C.; Vitells, O.; Wall, R.; Wang, H.; Weber, M.; Weinheimer, C.; Laubenstein, M.

doi:10.1140/epjc/s10052-015-3657-5

Cited by 98 publications

(98 citation statements)

References 30 publications

(43 reference statements)

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“…The TPC is instrumented with 248 3-in. Hamamatsu R11410-21 PMTs arranged in two arrays above and below the LXe target [11,12]. Interactions in the target produce scintillation photons (S1) and ionization electrons.…”

mentioning

confidence: 99%

First Dark Matter Search Results from the XENON1T Experiment

Aprile¹,

Aalbers²,

Agostini³

et al. 2017

Phys. Rev. Lett.

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915

1,080

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We report the first dark matter search results from XENON1T, a ∼2000-kg-target-mass dual-phase (liquid-gas) xenon time projection chamber in operation at the Laboratori Nazionali del Gran Sasso in Italy and the first ton-scale detector of this kind. The blinded search used 34.2 live days of data acquired between November 2016 and January 2017. Inside the ð1042 AE 12Þ-kg fiducial mass and in the ½5; 40 keV nr energy range of interest for weakly interacting massive particle (WIMP) dark matter searches, the electronic recoil background was ð1.93 AE 0.25Þ × 10 −4 events=ðkg × day × keV ee Þ, the lowest ever achieved in such a dark matter detector. A profile likelihood analysis shows that the data are consistent with the background-only

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mentioning

confidence: 99%

First Dark Matter Search Results from the XENON1T Experiment

Aprile¹,

Aalbers²,

Agostini³

et al. 2017

Phys. Rev. Lett.

Self Cite

915

1,080

View full text Add to dashboard Cite

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“…where S1 is the primary scintillation light, S2 is the ionization charge, ε(S1) is the S1 detection efficiency, ε S2 (E R ) is an efficiency cutoff, n is the PE number, ν E R is the expected number of PE for a given recoil energy E R . The corresponding single photoelectron resolution is between (35-40)% [59,60].…”

Section: The Experimental Datamentioning

confidence: 99%

Constraints on dark matter interactions from the first results of DarkSide-50

Zhou

2019

Nuclear Physics B

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In an extended effective operator framework of isospin violating interactions with light mediators, we investigate the compatibility of the candidate signal of the CDMS-II-Si with the latest constraints from DarkSide-50 and XENON-1T, etc. We show that the constraints from DarkSide-50 which utilizes Argon as the target is complementary to that from XENON-1T which utilizes Xenon. Combining the results of the two experiments, we find that for isospin violating interaction with light mediator there is no parameter space which can be compatible with the positive signals from CDMS-II-Si. As a concrete example of this framework, we investigate the dark photon model in detail. We obtain the combined limits on the dark matter mass m χ , the dark photon mass m A ′ , and the kinetic mixing parameter ε in the dark photon model. The DarkSide-50 gives more stringent upper limits in the region of mediator mass from 0.001 to 1 GeV, for m χ 6 GeV in the (m A ′ ,ε) plane, and more stringent constraints for m χ 8 GeV and ε ∼ 10 −8 in the (m χ ,m A 1 predicted background. The results of CoGeNT are inconsistent with the negative results from CDEX [20-23] which utilizes the same type of germanium detector. The CDMS-II-Si reported three WIMP-candidate events. It favors a DM particle mass ∼ 8.6 GeV and a spin-independent DM-nucleon scattering cross section ∼ 1.9 × 10 −41 cm 2 . This results are also in tension with the limits of other experiments, when interpreted in terms of DM-nucleus elastic scattering in the simple DM model.The interpretations of the experimental data involve simplified assumptions. For instance, the interactions between DM particles and target nuclei are often assumed to be isospin conserving, contact, and elastic etc. Simplified assumptions are also adopted on the DM velocity distribution, DM local energy density, nuclear form factors, detector responses, etc. The interpretations of the experimental data can be changed dramatically if some of the assumptions is modified. In order to reconcile the conflicts among the experiments, several mechanisms have been discussed, such as the isospin violating interactions [24][25][26], the light WIMPs-nucleus mediators [27][28][29], exothermic scattering [28][29][30][31][32], the different DM velocity profile [33][34][35][36] and halo-independent [37-39] ,etc.In this work, we reinterpret the results from CDMS-II-Si with the new data from DarkSide-50 [14], XENON1T [13], CDEX-10 [23], etc., in the extended effective operator framework [27,[40][41][42][43] with both isospin violating interactions and light mediators. The effective operator framework is actually the secluded DM scenario, where the DM and the mediator compose a hidden DM sector. The mediator may have sizable coupling with the DM, but its coupling with SM particles is usually very weak by some mechanism. The isospin-violating interaction and light mediators are the popular methods to ameliorate the tensions in the direct detection experiments. In the scenario of isospin violating, the DM particle couples to proton ...

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“…where S min 1 = 3 photoelectrons (PE), S max 1 = 70 PE, σ PMT is the average single-PE resolution of the photomultipliers, (E R ) is the detection efficiency, and ν(E R ) is the expected number of PEs for a given recoil energy E R . We conservatively take σ PMT = 0.4 [59,60], and read (E R ) from the black solid line in Fig. 1 in Ref.…”

Section: Direct Detection Limits/prospectsmentioning

confidence: 99%

Singlet Dirac fermion dark matter with mediators at loop

Hisano

Nagai

2018

J. High Energ. Phys.

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We study the phenomenology of singlet Dirac fermion dark matter in the simplified models where the dark matter interacts with the Standard Model particles at loop-level with the help of either colored or non-colored mediators. We especially focus on the implications of non-zero CP phases in the dark sector, which induce the electric dipole moments of the Dirac fermion dark matter as well as those of electron and nucleon. It is then found that the dark matter direct detection searches and the measurements of the electric dipole moments are able to test the singlet Dirac fermion dark matter scenario in the forthcoming experiments.

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Lowering the radioactivity of the photomultiplier tubes for the XENON1T dark matter experiment

Cited by 98 publications

References 30 publications

First Dark Matter Search Results from the XENON1T Experiment

First Dark Matter Search Results from the XENON1T Experiment

Constraints on dark matter interactions from the first results of DarkSide-50

Singlet Dirac fermion dark matter with mediators at loop

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