New limits on double electron capture of<sup>40</sup>Ca and<sup>180</sup>W

Angloher, G.; Bauer, M.; Bauer, Patrick; Bavykina, I.; Bento, A.; Bucci, C.; Canonica, L.; Ciemniak, C.; Defaÿ, X.; Deuter, G.; Erb, A.; Feilitzsch, F. von; Iachellini, N. Ferreiro; Gorla, P.; Gütlein, A.; Hauff, D.; Huff, P.; Isaila, C.; Jochum, J.; Kiefer, M.; Kimmerle, M.; Kluck, H.; Kraus, H.; Lanfranchi, J.‐C.; Loebell, J.; Münster, A.; Pagliarone, C.; Petricca, F.; Pfister, S.; Potzel, W.; Pröbst, F.; Reindl, F.; Roth, Stephan V.; Rottler, K.; Sailer, C.; Schäffner, K.; Schieck, J.; Schmaler, J.; Scholl, Stephan; Schönert, S.; Seidel, W.; Sivers, M. v.; Stodolsky, L.; Strandhagen, C.; Strauss, R. D.; Tanzke, A.; Tretyak, V. I.; Thi, H. H. Trinh; Türkoğlu, C.; Uffinger, M.; Ulrich, A.; Usherov, I.; Wawoczny, S.; Willers, M.; Wüstrich, M.; Zöller, A.

doi:10.1088/0954-3899/43/9/095202

Cited by 25 publications

(28 citation statements)

References 33 publications

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“…Moreover, a resonant neutrinoless ECEC could be fulfilled in selected nuclei [15][16][17]. For both ECEC modes limits of 10 21 − 10 22 years have been set in various isotopes [11,[18][19][20][21][22][23].…”

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confidence: 99%

Two-neutrino double electron capture on 124Xe based on an effective theory and the nuclear shell model

2019

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We study the two-neutrino double electron capture on 124 Xe based on an effective theory (ET) and large-scale shell model calculations, two modern nuclear structure approaches that have been tested against Gamow-Teller and double-beta decay data. In the ET, the low-energy constants are fit to electron capture and β − transitions around xenon. For the nuclear shell model, we use an interaction in a large configuration space that reproduces the spectroscopy of nuclei in this mass region. For the dominant transition to the 124 Te ground state, we find half-lives T 2νECEC 1/2 = (1.3 − 18) × 10 22 y for the ET and T 2νECEC 1/2 = (0.43 − 2.9) × 10 22 y for the shell model. The ET uncertainty leads to a half-life almost entirely consistent with present experimental limits and largely within the reach of ongoing experiments. The shell model half-life range overlaps with the ET, but extends less beyond current limits. Our findings thus suggest that the two-neutrino double electron capture on 124 Xe has a good chance to be discovered by ongoing or future experiments. In addition, we present results for the two-neutrino double electron capture to excited states of 124 Te. arXiv:1809.04443v1 [nucl-th]

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confidence: 99%

Two-neutrino double electron capture on 124Xe based on an effective theory and the nuclear shell model

2019

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“…While the detector module TUM40 [1] is built using a crystal from the in-house production with low intrinsic radioactive noise, the second detector is based on a conventional detection design and a commercial crystal with normal intrinsic background conditions [2]. Data taken during a previous data taking period are used to test the Majorana character of neutrinos [4].…”

Section: Resultsmentioning

confidence: 99%

“…Data from the CRESST II experiment taken between 2009 and 2011 are analysed to search for these processes [4]. a light yield smaller than one are used, here events consistent with an electron or gamma scatter and a light yield of around one are studied.…”

Section: Search For Double Electron Capture Processesmentioning

confidence: 99%

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Direct dark matter search with the CRESST experiment

Schieck¹,

Gütlein²,

Kluck³

et al. 2017

Proceedings of 38th International Conference on High Energy Physics — PoS(ICHEP2016)

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The quest for the particle nature of dark matter is one of the big open questions of modern physics. A well motivated candidate for dark matter is the so-called WIMP -a weakly interacting massive particle. Recently several theoretically well-motivated models with dark matter candidates in a mass region below the WIMP mass-scale gained also a lot of interest, theoretically and experimentally. The CRESST II experiment located at the Gran Sasso laboratory in Italy is optimised for the detection of the elastic scattering of these low-mass dark matter particles with ordinary matter. We show the results obtained with an improved detector setup with increased radio purity and enhanced background rejection and the results obtained with a dedicated low-threshold analysis of a single conventional detector module. The limit achieved is the most stringent limit achieved for direct dark matter experiments in the mass region below 1.8 GeV/c 2 . We will discuss the expected performance for new small CRESST-type detectors to be used during the next data taking phase. We conclude with an outlook of the future potential for direct dark matter detection using further improved CRESST CaWO 4 cryogenic detectors.

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“…In this work, we examine such a light bino-like DM in the MSSM with H playing the role of the SM-like Higgs boson. In particular, we focus on the GeV-scale DM in a mass range of 2-20 GeV, in which DAMA [14], COGENT [15] and CRESST [16] experiments have reported some plausible signals of WIMP interaction. We will first utilize the current LHC Run-2 data and DM direct detection results to examine whether such a GeV-scale neutralino DM is still allowed in the MSSM.…”

Section: Introductionmentioning

confidence: 99%

Probing GeV-scale MSSM neutralino dark matter in collider and direct detection experiments

Duan¹,

Wang²,

Wu³

et al. 2018

Physics Letters B

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Given the recent constraints from the dark matter (DM) direct detections, we examine a light GeV-scale (2-30 GeV) neutralino DM in the alignment limit of the Minimal Supersymmetric Standard Model (MSSM). In this limit without decoupling, the heavy CP-even scalar H plays the role of the Standard Model (SM) Higgs boson while the other scalar h can be rather light so that the DM can annihilate through the h resonance or into a pair of h to achieve the observed relic density.With the current collider and cosmological constraints, we find that such a light neutralino DM above 6 GeV can be excluded by the XENON-1T (2017) limits while the survivied parameter space below 6 GeV can be fully tested by the future germanium-based light dark matter detections (such as CDEX), by the Higgs coupling precison measurements or by the production process e + e − → hA at an electron-positron collider (Higgs factory).

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New limits on double electron capture of⁴⁰Ca and¹⁸⁰W

Abstract: Abstract. We analyzed low-background data from the CRESST-II experiment with a total net exposure of 730 kg days to extract limits on double electron capture processes. We established new limits for 40 Ca with T 2ν2K

Cited by 25 publications

References 33 publications

Two-neutrino double electron capture on 124Xe based on an effective theory and the nuclear shell model

Two-neutrino double electron capture on 124Xe based on an effective theory and the nuclear shell model

Direct dark matter search with the CRESST experiment

Probing GeV-scale MSSM neutralino dark matter in collider and direct detection experiments

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New limits on double electron capture of40Ca and180W

Abstract: Abstract. We analyzed low-background data from the CRESST-II experiment with a total net exposure of 730 kg days to extract limits on double electron capture processes. We established new limits for 40 Ca with T 2ν2K

Cited by 25 publications

References 33 publications

Two-neutrino double electron capture on 124Xe based on an effective theory and the nuclear shell model

Two-neutrino double electron capture on 124Xe based on an effective theory and the nuclear shell model

Direct dark matter search with the CRESST experiment

Probing GeV-scale MSSM neutralino dark matter in collider and direct detection experiments

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Product

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New limits on double electron capture of⁴⁰Ca and¹⁸⁰W