Assessment of molecular effects on neutrino mass measurements from tritium beta decay

Bodine, L. I.; Parno, D. S.; Robertson, R. G. H.

doi:10.48550/arxiv.1502.03497

Cited by 3 publications

(4 citation statements)

References 99 publications

(225 reference statements)

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“…A similar form is found e.g. using a full N -body treatment of the beta decay of molecular tritium [11]. An additional shift is contributed by the difference in chemical binding for atoms that decay in a solid or liquid environment.…”

Section: Atomic Effects In 0νββ Decaysupporting

confidence: 66%

Shake-up and shake-off effects in neutrinoless double-beta decay

Detwiler¹,

Robertson²

2022

Preprint

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We revisit the role of shake-up and shake-off effects in neutrinoless double-beta decay, following earlier work by Drukarev et al. We find in agreement with Drukarev et al. that the Q value of the decay is reduced by any atomic excitation in the final-state but not by the difference in atomic binding energy of the initial and final state atoms, as was recently suggested by Mei and Wei. We discuss how the absorption of subsequent atomic de-excitation ejecta shifts the neutrinoless doublebeta decay peak back to its nominal value. We propose an in situ experimental verification of these ideas, and discuss the impact of shake-up and shake-off on two-neutrino double-beta decay spectral shapes.

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Section: Atomic Effects In 0νββ Decaysupporting

confidence: 66%

Shake-up and shake-off effects in neutrinoless double-beta decay

Detwiler¹,

Robertson²

2022

Preprint

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“…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: Resultsmentioning

confidence: 99%

“…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]. Also plasma-effects in the WGTS [63] and the high-voltage stability [64] will most likely have a non-neglegible effect.…”

Section: Jcap06(2017)015 4 Discussionmentioning

confidence: 99%

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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“…On the other hand, calculations of and for β-decay of atoms in many-electron systems of complex molecules or for β-emitters imbedded into solids may also suffer from insufficient knowledge of the composition of the radioactive samples. Very recently, a detailed assessment of molecular effects on the determination of from tritium β-spectra has become available [85]. Since the discovery of neutrino oscillations, it is necessary also to consider the individual neutrino mass states in the analysis of the measured β-spectra using the formula (11) This is exemplified in Fig.…”

Section: Fig (5)mentioning

confidence: 99%

Constraints on the Active and Sterile Neutrino Masses from Beta-Ray Spectra: Past, Present and Future1

Dragoun¹,

Vénos²

2016

PHY

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Abstract:Although neutrinos are probably the most abundant fermions of the universe their mass is not yet known. Oscillation experiments have proven that at least one of the neutrino mass states has m i > 0.05 eV while various interpretations of cosmological observations yielded an upper limit for the sum of neutrino masses ∑m i < (0.14 -1.7) eV. The searches for the yet unobserved 0νββ decay result in an effective neutrino mass m ββ < (0.2 -0.7) eV. The analyses of measured tritium β-spectra provide an upper limit for the effective electron neutrino mass m(v e ) < 2 eV. In this review, we summarize the experience of two generations of β-ray spectroscopists who improved the upper limit of m(v e ) by three orders of magnitude. We describe important steps in the development of radioactive sources and electron spectrometers, and recapitulate the lessons from now-disproved claims for the neutrino mass of 30 eV and the 17 keV neutrino with an admixture larger than 0.03%. We also pay attention to new experimental approaches and searches for hypothetical sterile neutrinos.

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Assessment of molecular effects on neutrino mass measurements from tritium beta decay

Cited by 3 publications

References 99 publications

Shake-up and shake-off effects in neutrinoless double-beta decay

Shake-up and shake-off effects in neutrinoless double-beta decay

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

Constraints on the Active and Sterile Neutrino Masses from Beta-Ray Spectra: Past, Present and Future1

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