Comment on ‘Using cold atoms to measure neutrino mass’

Otten, E.

doi:10.1088/1367-2630/13/7/078001

Cited by 7 publications

(10 citation statements)

References 4 publications

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“…Another approach has been proposed by Jerkins and co-workers [170] who suggest to perform a full kinematic reconstruction of the decays of trapped tritium atoms. This idea, however, seems to be hampered by conceptual difficulties [171].…”

Section: Status and Outlookmentioning

confidence: 99%

Current Direct Neutrino Mass Experiments

Drexlin

Hannen

Mertens

et al. 2013

Advances in High Energy Physics

288

304

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In this contribution we review the status and perspectives of direct neutrino mass experiments. These experiments investigate the kinematics of β-decays of specific isotopes ( 3 H, 187 Re, 163 Ho) to derive model-independent information on the averaged electron (anti-) neutrino mass, which is formed by the incoherent sum of the neutrino mass eigenstates contributing to the electron neutrino. We first review the kinematics of β-decay and the determination of the neutrino mass, before giving a brief overview of past neutrino mass measurements (SN1987a-ToF studies, Mainz and Troitsk experiments for 3 H, cryo-bolometers for 187 Re). We then describe the Karlsruhe Tritium Neutrino (KATRIN) experiment which is currently under construction at Karlsruhe Institute of Technology. The large-scale setup will use the MAC-E-Filter principle pioneered earlier to push the sensitivity down to a value of 200 meV (90% C.L.). KATRIN faces many technological challenges that have to be resolved with regard to source intensity and stability, as well as precision energy analysis and low background rate close to the kinematic endpoint of tritium β-decay at 18.6 keV. We then review new experimental approaches such as the MARE, ECHO and Project8 experiments, which offer the promise to perform an independent measurement of the neutrino mass in the sub-eV region. This variety of methods and the novel technologies developed in all present and future experiments demonstrate the great potential of direct neutrino mass experiments in providing vital information on the absolute mass scale of neutrinos.

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Section: Status and Outlookmentioning

confidence: 99%

Current Direct Neutrino Mass Experiments

Drexlin

Hannen

Mertens

et al. 2013

Advances in High Energy Physics

288

304

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“…Alternative measurement techniques using tritium sources are also being explored. An approach for coincidence detection of the beta electron and the 3 He + ion from a source of trapped tritium atoms was proposed [30] but later shown to be infeasible [31,32]. The Project 8 collaboration is currently studying the feasibility of measuring beta electron energies by trapping and measuring their cyclotron radiation frequencies with microwave antennae [33,34].…”

Section: B Future Prospects For Direct Neutrino-mass Experimentsmentioning

confidence: 99%

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

Bodine,

Parno,

Robertson

2015

Preprint

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The beta decay of molecular tritium currently provides the highest sensitivity in laboratory-based neutrino mass measurements. The upcoming Karlsruhe Tritium Neutrino (KATRIN) experiment will improve the sensitivity to 0.2 eV, making a percent-level quantitative understanding of molecular effects essential. The modern theoretical calculations available for neutrino-mass experiments agree with spectroscopic data. Moreover, when neutrino-mass experiments performed in the 1980s with gaseous tritium are re-evaluated using these modern calculations, the extracted neutrino masssquared values are consistent with zero instead of being significantly negative. On the other hand, the calculated molecular final-state branching ratios are in tension with dissociation experiments performed in the 1950s. We re-examine the theory of the final-state spectrum of molecular tritium decay and its effect on the determination of the neutrino mass, with an emphasis on the role of the vibrational-and rotational-state distribution in the ground electronic state. General features can be reproduced quantitatively from considerations of kinematics and zero-point motion. We summarize the status of validation efforts and suggest means for resolving the apparent discrepancy in dissociation rates.

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“…However, despite the expected high resolution measurements of displacements due to recoil, our proposed system does not detect beta and neutrino emissions independently. An additional way of measuring the energy and momentum of a beta particle would be necessary for this purpose [51].…”

Section: Discussionmentioning

confidence: 99%

Nuclear recoil spectroscopy of levitated particles

2018

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We propose a new method for the detection and characterization of nuclear decay processes. Specifically, we describe how nuclear decay recoil can be observed within small particles levitated in an optical trap with high positional resolution. Precise measurements of the magnitude of each recoil as well as their rate of occurrence can provide accurate information about the isotopic composition of a radioactive sample. We expect that this new technique for nuclear material characterization will be especially useful in the area of nuclear forensic analysis.

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Comment on ‘Using cold atoms to measure neutrino mass’

Cited by 7 publications

References 4 publications

Current Direct Neutrino Mass Experiments

Current Direct Neutrino Mass Experiments

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

Nuclear recoil spectroscopy of levitated particles

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