Toward a more accurate Q value measurement of tritium: status of THe-Trap

Streubel, Sebastian; Eronen, T.; Höcker, Martin; Ketter, Jochen; Schuh, M.; Dyck, Robert S. Van; Blaum, Klaus

doi:10.1007/s00340-013-5669-x

Cited by 21 publications

(19 citation statements)

References 32 publications

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“…A significant improvement of the sensitivity and normalization of the estimation bias is only expected if the endpoint can be constrained with a precision better than 0.1 eV (at 1σ). The most promising way of achieving this aim are 3 H-3 He mass measurements with precision Penning traps [60,61]. As future experiments aim for a bound of ∼ 30 meV [60], there is realistic hope to set stronger constraints on E 0 in the future.…”

Section: Discussionmentioning

confidence: 99%

“…The most promising way of achieving this aim are 3 H-3 He mass measurements with precision Penning traps [60,61]. As future experiments aim for a bound of ∼ 30 meV [60], there is realistic hope to set stronger constraints on E 0 in the future. Since the endpoint is washed out by rotational-vibrational excitations of the daughter molecules, this means, regarding any future study of the systematics, that all molecular effects will need to be known sufficiently precise as well [62].…”

Section: Discussionmentioning

confidence: 99%

“…Current Q value bounds from 3 H-3 He mass measurements with precision Penning traps [61] can be translated into a constraint of ∼ 0.1 eV. Future experiments aim for a bound of ∼ 30 meV [60]. However, molecular effects and nuclear recoil have to be taken into account, which can possibly weaken the constraint on the endpoint [62].…”

Section: Constrained Endpointmentioning

confidence: 99%

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Statistical sensitivity on right-handed currents in presence of eV scale sterile neutrinos with KATRIN

Steinbrink

Glück

Heizmann

et al. 2017

J. Cosmol. Astropart. Phys.

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The KATRIN experiment aims to determine the absolute neutrino mass by measuring the endpoint region of the tritium β-spectrum. As a large-scale experiment with a sharp energy resolution, high source luminosity and low background it may also be capable of testing certain theories of neutrino interactions beyond the standard model (SM). An example of a non-SM interaction are right-handed currents mediated by righthanded W bosons in the left-right symmetric model (LRSM). In this extension of the SM, an additional SU(2) R symmetry in the high-energy limit is introduced, which naturally includes sterile neutrinos and predicts the seesaw mechanism. In tritium β decay, this leads to an additional term from interference between left-and right-handed interactions, which enhances or suppresses certain regions near the endpoint of the beta spectrum. In this work, the sensitivity of KATRIN to right-handed currents is estimated for the scenario of a light sterile neutrino with a mass of some eV. This analysis has been performed with a Bayesian analysis using Markov Chain Monte Carlo (MCMC). The simulations show that, in principle, KATRIN will be able to set sterile neutrino massdependent limits on the interference strength. The sensitivity is significantly increased if the Q value of the β decay can be sufficiently constrained. However, the sensitivity is not high enough to improve current upper limits from right-handed W boson searches at the LHC.

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Section: Discussionmentioning

confidence: 99%

Section: Discussionmentioning

confidence: 99%

Section: Constrained Endpointmentioning

confidence: 99%

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Statistical sensitivity on right-handed currents in presence of eV scale sterile neutrinos with KATRIN

Steinbrink

Glück

Heizmann

et al. 2017

J. Cosmol. Astropart. Phys.

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“…The FT-ICR method is used or is planned to be used to measure the cyclotron frequency ν c with an ultimate relative uncertainty of below 0.01 ppb at such ultraprecise Penning-trap mass spectrometers as the FSU trap [144], the THe-Trap [145], HCI [146] and PENTATRAP [121].…”

Section: K As Surface Contaminationmentioning

confidence: 99%

The electron capture in 163Ho experiment – ECHo

Gastaldo

Blaum

Chrysalidis

et al. 2017

Eur. Phys. J. Spec. Top.

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136

110

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Abstract. Neutrinos, and in particular their tiny but non-vanishing masses, can be considered one of the doors towards physics beyond the Standard Model. Precision measurements of the kinematics of weak interactions, in particular of the 3 H β-decay and the 163 Ho electron capture (EC), represent the only model independent approach to determine the absolute scale of neutrino masses. The electron capture in 163 Ho experiment, ECHo, is designed to reach sub-eV sensitivity on the electron neutrino mass by means of the analysis of the calorimetrically measured electron capture spectrum of the nuclide 163 Ho. The maximum energy available for this decay, about 2.8 keV, constrains the type of detectors that can be used. Arrays of low temperature metallic magnetic calorimeters (MMCs) are being developed to measure the 163 Ho EC spectrum with energy resolution below 3 eV FWHM and with a time resolution below 1 μs. To achieve the sub-eV sensitivity on the electron neutrino mass, together with the detector optimization, the availability of large ultra-pure 163 Ho samples, the identification and suppression of background sources as well as the precise parametrization of the 163 Ho EC spectrum are of utmost importance. The high-energy resolution 163 Ho spectra measured with the first MMC prototypes with ion-implanted 163 Ho set the basis for the ECHo experiment. We describe the conceptual design of ECHo and motivate the strategies we have adopted to carry on the present medium scale experiment, ECHo-1K. In this experiment, the use of 1 kBq 163 Ho will allow to reach a neutrino mass sensitivity below 10 eV/c 2 . We then discuss how the results being achieved in ECHo-1k will guide the design of the next stage of the ECHo experiment, ECHo-1M, where a source of the order of 1 MBq 163 Ho embedded in large MMCs arrays will allow to reach sub-eV sensitivity on the electron neutrino mass.

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“…Many Penning Trap Mass Spectrometry (PTMS) facilities throughout the world [1][2][3][4][5][6][7][8][9][10][11][12][13] have been used to perform high-precision mass measurements on stable, long-lived, and short-lived isotopes in recent years to investigate nuclear shell structure, halo nuclei, nuclear astrophysics, determinations of beta decay Q-values, and tests of fundamental interactions and of the Isobaric Multiplet Mass Equation (IMME). PTMS facilities have achieved mass measurement fractional precisions as small as 7 parts in 10 −12 for stable isotopes [14] and less than 10 −8 for unstable isotopes [15,16].…”

Section: Introductionmentioning

confidence: 99%