Search for heavy neutrinos in the β-spectrum of Ni

Holzschuh, E.; Kündig, W.; Palermo, L.; Stüssi, H.; Wenk, Paul

doi:10.1016/s0370-2693(99)00200-2

Cited by 52 publications

(46 citation statements)

References 21 publications

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“…For some time, the effect was seen in several β-spectra taken with semiconductor spectrometers but it has never been recorded by magnetic and electrostatic instruments. Finally, the study of the β-spectrum of 63 Ni (Q β = 66.9 keV) with a magnetic spectrometer put the admixture of the 17 keV neutrino below 5 · 10 −4 at 95% CL and found |U e4 | 2 < 1 · 10 −3 for all m 4 between 4 and 30 keV [642]. At present, there are no β-spectroscopic indications for sterile neutrinos [643][644][645][646][647].…”

Section: Laboratory Constraints (Author: O Dragoun)mentioning

confidence: 99%

See 1 more Smart Citation

A White Paper on keV sterile neutrino Dark Matter

Adhikari

Agostini

et al. 2017

J. Cosmol. Astropart. Phys.

380

316

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Abstract. We present a comprehensive review of keV-scale sterile neutrino Dark Matter, collecting views and insights from all disciplines involved -cosmology, astrophysics, nuclear, and particle physics -in each case viewed from both theoretical and experimental/observational perspectives. After reviewing the role of active neutrinos in particle physics, astrophysics, and cosmology, we focus on sterile neutrinos in the context of the Dark Matter puzzle. Here, we first review the physics motivation for sterile neutrino Dark Matter, based on challenges and tensions in purely cold Dark Matter scenarios. We then round out the discussion by critically summarizing all known constraints on sterile neutrino Dark Matter arising from astrophysical observations, laboratory experiments, and theoretical considerations. In this context, we provide a balanced discourse on the possibly positive signal from X-ray observations. Another focus of the paper concerns the construction of particle physics models, aiming to explain how sterile neutrinos of keV-scale masses could arise in concrete settings beyond the Standard Model of elementary particle physics. The paper ends with an extensive review of current and future astrophysical and laboratory searches, highlighting new ideas and their experimental challenges, as well as future perspectives for the discovery of sterile neutrinos.

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Section: Laboratory Constraints (Author: O Dragoun)mentioning

confidence: 99%

“…The gray lines represent the current laboratory limits [642] and the parameter space excluded by astrophysical observations [397,911].…”

Section: Tritium Beta Decay Experiments (Author: S Mertens)mentioning

confidence: 99%

A White Paper on keV sterile neutrino Dark Matter

Adhikari

Agostini

et al. 2017

J. Cosmol. Astropart. Phys.

380

316

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“…Existing limits for electron-coupled HNL come from a variety of probes. For M N 30 MeV, the strongest constraints come from searches for deviations from predicted nuclear β decay [114][115][116][117][118][119][120][121] and π → eν [122,123] rates and spectra; Ref. [124] provides a thorough review of constraints on heavy neutrinos under minimal theoretical assumptions, see also [125,126].…”

Section: Existing Limitsmentioning

confidence: 99%

Searches for decays of new particles in the DUNE Multi-Purpose near Detector

Berryman

Gouvêa

Fox

et al. 2020

J. High Energ. Phys.

105

166

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One proposed component of the upcoming Deep Underground Neutrino Experiment (DUNE) near detector complex is a multi-purpose, magnetized, gaseous argon time projection chamber: the Multi-Purpose Detector (MPD). We explore the new-physics potential of the MPD, focusing on scenarios in which the MPD is significantly more sensitive to new physics than a liquid argon detector, specifically searches for semi-long-lived particles that are produced in/near the beam target and decay in the MPD. The specific physics possibilities studied are searches for dark vector bosons mixing kinetically with the Standard Model hypercharge group, leptophilic vector bosons, dark scalars mixing with the Standard Model Higgs boson, and heavy neutral leptons that mix with the Standard Model neutrinos. We demonstrate that the MPD can extend existing bounds in most of these scenarios. We illustrate how the ability of the MPD to measure the momentum and charge of the final state particles leads to these bounds. arXiv:1912.07622v1 [hep-ph] 16 Dec 2019 Liquid Argon Near Detector: The liquid argon near detector has a width (transverse to the beam direction) of 7 m, a height of 3 m, and a length (in the beam direction) of 5 m. The fiducial mass of the near detector is 50 t of argon. See Ref. [2] for more detail.Multi-Purpose Detector: The Multi-Purpose Detector (MPD) is a magnetic spectrometer with a cylindrical high-pressure gaseous argon time projection chamber (HPTPC) at its heart. The HPTPC has a diameter of 5 m and a length of 5 m. It is surrounded by an electromagnetic calorimeter (ECAL) and the HPTPC+ECAL system is situated inside a magnet with 0.5 T central field. The axis of the cylinder is perpendicular to the beam direction. However, for simplicity, when simulating our signals (see Section 3), * Some projections of DUNE operation include the possibility of an upgraded beam (roughly twice the number of protons on target per year) that can operate in the second half of the experiment. We assume a constant number of protons on target per year, so our ten-year projection is equivalent to a shorter operation time with such an upgraded beam. † This is in contrast with the LArTPC, where the conversion distance of photons is O(10 cm). Far more photons can fake the signal of e + e − in the LArTPC than in the HPTPC. * Ref. [63] provides a thorough review of searches for dark photons and existing constraints. * The results of this analysis in antineutrino mode are qualitatively equivalent.

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“…For masses m H < 1 MeV the most sensitive searches have looked for kinks in the electron spectra of decays and have constrained the sterile-electron mixing to jU eH j 2 < 10 À2 -10 À3 [14][15][16][17][18]. The agreement with expectations of ft values for superallowed pure Fermi beta transitions also limits the mixing of massive neutrino and electron flavor [19][20][21].…”

Section: Introductionmentioning

confidence: 87%

“…For masses up to m H % 6 MeV, an important bound is provided by ft values for superallowed Fermi decays (line 4 [21]) and by searches of kinks in the electron spectrum of decays of 20 F (line 5 [21]), 64 Cu (line 6 [14]), 45 Ca (line 7 [16]), 63 Ni (line 8 [18]) and 35 S (line 9 [18]). …”

Section: B the Obtained Limitsmentioning

confidence: 99%

New limits on heavy sterile neutrino mixing inB8decay obtained with the Borexino detector

Bellini¹,

Benziger²,

Bick³

et al. 2013

Phys. Rev. D

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If heavy neutrinos with mass m H ! 2m e are produced in the Sun via the decay 8 B ! 8 Be þ e þ þ H in a side branch of the pp chain, they would undergo the observable decay into an electron, a positron and a light neutrino H ! L þ e þ þ e À . In the present work Borexino data are used to set a bound on the existence of such decays. We constrain the mixing of a heavy neutrino with mass 1:5 MeV m H 14 MeV to be jU eH j 2 ð10 À3 À 4 Â 10 À6 Þ, respectively. These are tighter limits on the mixing parameters than obtained in previous experiments at nuclear reactors and accelerators.

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Search for heavy neutrinos in the β-spectrum of Ni

Cited by 52 publications

References 21 publications

A White Paper on keV sterile neutrino Dark Matter

A White Paper on keV sterile neutrino Dark Matter

Searches for decays of new particles in the DUNE Multi-Purpose near Detector

New limits on heavy sterile neutrino mixing inB8decay obtained with the Borexino detector

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