The CANDLES experiment for the study of Ca-48 double beta decay

Iida, Tsutomu; Kishimoto, T.; Nomachi, M.; Ajimura, S.; Umehara, S.; Nakajima, K.; Ichimura, Kunihiro; Yoshida, S.; Suzuki, K.; Kakubata, H.; Wang, W.; Chan, W. M.; Trang, V. T. T.; Doihara, M.; Ishikawa, T.; Tanaka, Daisuke; Tanaka, M.; Maeda, Tsuyoshi; Ohata, Toshihiro; Tetsuno, K.; Tamagawa, Y.; Ogawa, Izumi; Tomita, S.; Fujita, G.; Kawamura, Akiko; Harada, Takaaki; Inukai, Y.; Sakamoto, K.; Yoshizawa, M.; Fushimi, K.; Hazama, R.; Nakatani, Noboru; Osumi, H.; Okada, K.

doi:10.1016/j.nuclphysbps.2015.10.013

Cited by 10 publications

(5 citation statements)

References 2 publications

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“…Such scenarios involving sterile neutrinos can affect neutrinoless double beta decay (0νββ) experiments, which are excellent probes of lepton number violation (LNV). Current experimental limits on 0νββ half lives are at the level of 10 26 years and next-generation ton-scale experiments aim for one or two order-of-magnitude improvements [28][29][30][31][32][33][34][35][36][37].…”

Section: Introductionmentioning

confidence: 99%

Sterile neutrinos and neutrinoless double beta decay in effective field theory

Dekens

Vries

Fuyuto

et al. 2020

J. High Energ. Phys.

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We investigate neutrinoless double beta decay (0νββ) in the presence of sterile neutrinos with Majorana mass terms. These gauge-singlet fields are allowed to interact with Standard-Model (SM) fields via renormalizable Yukawa couplings as well as higherdimensional gauge-invariant operators up to dimension seven in the Standard Model Effective Field Theory extended with sterile neutrinos. At the GeV scale, we use Chiral effective field theory involving sterile neutrinos to connect the operators at the level of quarks and gluons to hadronic interactions involving pions and nucleons. This allows us to derive an expression for 0νββ rates for various isotopes in terms of phase-space factors, hadronic low-energy constants, nuclear matrix elements, the neutrino masses, and the Wilson coefficients of higher-dimensional operators. The required hadronic low-energy constants and nuclear matrix elements depend on the neutrino masses, for which we obtain interpolation formulae grounded in QCD and chiral perturbation theory that improve existing formulae that are only valid in a small regime of neutrino masses. The resulting framework can be used directly to assess the impact of 0νββ experiments on scenarios with light sterile neutrinos and should prove useful in global analyses of sterile-neutrino searches. We perform several phenomenological studies of 0νββ in the presence of sterile neutrinos with and without higher-dimensional operators. We find that non-standard interactions involving sterile neutrinos have a dramatic impact on 0νββ phenomenology, and next-generation experiments can probe such interactions up to scales of O(100) TeV.

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Section: Introductionmentioning

confidence: 99%

Sterile neutrinos and neutrinoless double beta decay in effective field theory

Dekens

Vries

Fuyuto

et al. 2020

J. High Energ. Phys.

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“…The recent increase of new results in the field of DBD studies is due to significant development of various detector techniques (scintillators [5][6][7], semiconductor detectors [8,9], bolometers [10,11], scintillating bolometers [12][13][14], time-projection chambers [15][16][17][18], and tracking calorimeters [19,20]), the establishment of highly effective deep material purification, and last but not least, the development of high quality crystals with embedded and highly-enriched isotopes of interest (e.g. CaF 2 , high purity 76 Ge, TeO 2 , Zn 82 Se, 106 CdWO 4 , 116 CdWO 4 , Li 2 100 MoO 4 , Ca 100 MoO 4 , Zn 100 MoO 4 ) [21][22][23].…”

Section: Introductionmentioning

confidence: 99%

ZnO-based scintillating bolometers: new prospects to study double beta decay of ⁶⁴Zn

Armatol

Dumoulin

et al. 2023

J. Inst.

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The first detailed study on the performance of a ZnO-based cryogenic scintillating bolometer as a detector to search for rare processes in zinc isotopes was carried out. A 7.2 g ZnO low-temperature detector, containing more than 80% of zinc in its mass, exhibits good energy resolution of baseline noise 1.0–2.7 keV FWHM at various working temperatures resulting in a low-energy threshold for the experiment, 2.0–6.0 keV. The light yield for β/γ events was measured as 1.5(3) keV/MeV, while it varies for α particles in the range of 0.2–3.0 keV/MeV. The detector demonstrates an effective identification of β/γ events from α events using time-properties of only heat signals. The radiopurity of the ZnO crystal was evaluated using the Inductively Coupled Plasma Mass Spectrometry, an ultra-low-background High Purity Ge γ-spectrometer, and bolometric measurements. Only limits were set at the level of 𝒪(1–100) mBq/kg on activities of 40K, 137Cs and daughter nuclides from the U/Th natural decay chains. The total internal α-activity was measured as 22(2) mBq/kg, with a major contribution caused by 6(1) mBq/kg of 232Th and 12(2) mBq/kg of 234U. Limits on double beta decay (DBD) processes in ^64Zn and 70Zn isotopes were set on the level of 𝒪(1017–1018) yr for various decay modes, profiting from 271 h of acquired background data in the above-ground lab. This study shows a good potential for ZnO-based scintillating bolometers to search for DBD processes of Zn isotopes, especially in 64Zn, with the most prominent spectral features at ∼ 10–20 keV, like the two-neutrino double electron capture. A 10 kg-scale experiment can reach the experimental sensitivity at the level of 𝒪(1024) yr.

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“…The search for 0νββ decay is a worldwide race. Many projects are competing in the challenge to detect such a hypothetical decay: the CUORE/CUPID project [4] and LEGEND/GERDA [5] at the INFN-LNGS, in Italy; EXO/nEXO [6] at WIPP, in the USA; KamLAND-Zen [7] and CANDLES at Kamioka, Japan [8]; the SNO at Sudbury, in Canada [9]; AMoRe in Korea [10]; SuperNEMO at the LSM, in France [11], etc.…”

Section: Introductionmentioning

confidence: 99%

The NUMEN Project: Toward New Experiments with High-Intensity Beams

et al. 2021

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The search for neutrinoless double-beta (0νββ) decay is currently a key topic in physics, due to its possible wide implications for nuclear physics, particle physics, and cosmology. The NUMEN project aims to provide experimental information on the nuclear matrix elements (NMEs) that are involved in the expression of 0νββ decay half-life by measuring the cross section of nuclear double-charge exchange (DCE) reactions. NUMEN has already demonstrated the feasibility of measuring these tiny cross sections for some nuclei of interest for the 0νββ using the superconducting cyclotron (CS) and the MAGNEX spectrometer at the Laboratori Nazionali del Sud (LNS.) Catania, Italy. However, since the DCE cross sections are very small and need to be measured with high sensitivity, the systematic exploration of all nuclei of interest requires major upgrade of the facility. R&D for technological tools has been completed. The realization of new radiation-tolerant detectors capable of sustaining high rates while preserving the requested resolution and sensitivity is underway, as well as the upgrade of the CS to deliver beams of higher intensity. Strategies to carry out DCE cross-section measurements with high-intensity beams were developed in order to achieve the challenging sensitivity requested to provide experimental constraints to 0νββ NMEs.

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The CANDLES experiment for the study of Ca-48 double beta decay

Cited by 10 publications

References 2 publications

Sterile neutrinos and neutrinoless double beta decay in effective field theory

Sterile neutrinos and neutrinoless double beta decay in effective field theory

ZnO-based scintillating bolometers: new prospects to study double beta decay of ⁶⁴Zn

The NUMEN Project: Toward New Experiments with High-Intensity Beams

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The CANDLES experiment for the study of Ca-48 double beta decay

Cited by 10 publications

References 2 publications

Sterile neutrinos and neutrinoless double beta decay in effective field theory

Sterile neutrinos and neutrinoless double beta decay in effective field theory

ZnO-based scintillating bolometers: new prospects to study double beta decay of 64Zn

The NUMEN Project: Toward New Experiments with High-Intensity Beams

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ZnO-based scintillating bolometers: new prospects to study double beta decay of ⁶⁴Zn