Direct determination of Neutrino Mass from Tritium Beta Spectrum

Weinheimer, C.

doi:10.48550/arxiv.0912.1619

Cited by 4 publications

(4 citation statements)

References 43 publications

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“…The 1.5 eV/c 2 mass lies in the range covered by the KATRIN experiment, searching the mass of the electron antineutrino, that is expected to start taking data in 2011 (Weinheimer 2009). A discovery around 1.5 eV/c 2 would clearly prove our thesis.…”

Section: Discussionmentioning

confidence: 55%

Prediction for the neutrino mass in the KATRIN experiment from lensing by the galaxy cluster A1689

Nieuwenhuizen¹,

Morandi²

2011

Preprint

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The KATRIN experiment in Karlsruhe Germany will monitor the decay of tritium, which produces an electron-antineutrino. While the present upper bound for its mass is 2 eV/c 2 , KATRIN will search down to 0.2 eV/c 2 . If the dark matter of the galaxy cluster Abell 1689 is modeled as degenerate isothermal fermions, the strong and weak lensing data may be explained by degenerate neutrinos with mass of 1.5 eV/c 2 . Strong lensing data beyond 275 kpc put tension on the standard cold dark matter interpretation. In the most natural scenario, the electron antineutrino will have a mass of 1.5 eV/c 2 , a value that will be tested in KATRIN.Subject headings: Introduction, NFW profile for cold dark matter, Isothermal neutrino mass models, Applications of the NFW and isothermal neutrino models, Fit to the most recent data sets, Conclusion

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Section: Discussionmentioning

confidence: 55%

Prediction for the neutrino mass in the KATRIN experiment from lensing by the galaxy cluster A1689

Nieuwenhuizen¹,

Morandi²

2011

Preprint

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“…[430]). If m 4 is of the order of 1 eV, the approximation is acceptable for the interpretation of the result of the Mainz and Troitsk experiments, which had, respectively, energy resolutions of 4.8 eV and 3.5 eV [579]. On the other hand, the energy resolution of the KATRIN experiment will be 0.93 eV near the end-point of the energy spectrum of the electron emitted in Tritium decay, at T = Q, where T is the kinetic energy of the electron and Q = 18.574 keV is the Q-value of the decay.…”

Section: Impact Of Sterile Neutrinos For Absolute Neutrino Mass Measu...mentioning

confidence: 99%

Light Sterile Neutrinos: A White Paper

Abazajian,

Acero,

Agarwalla

et al. 2012

Preprint

471

864

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In memoriamRamaswami "Raju" S. Raghavan 1937 -2011 CONTENTS Executive summary I. Theory and Motivation A. Introduction: What is a Sterile Neutrino? B. Theoretical Motivations and Symmetries Behind the Existence of Light Sterile Neutrinos Sterile neutrinos in "standard approaches" Sterile neutrinos in "non-standard approaches" C. The Low-Energy Seesaw and Minimal Models General Aspects eV-scale Seesaw The νMSM D. Sterile Neutrino Dark Matter Dark matter in the νMSM Neutrinos in gauge multiplets -thermal production of DM neutrinos Primordial generation of DM neutrinos Other models E. Light Sterile Neutrinos as Messengers of New Physics F. Non-Standard Neutrino Interactions (NSI) CC-like NSI NC-like NSI Models to evade charged lepton NSI Summary of the present status on NSI G. Extra Forces H. Lorentz Violation Violation of Lorentz invariance in the standard model Lorentz-violating neutrinos Global models using Lorentz violation Some types of Lorentz violation: CPT violation, non-standard interactions, and lepton-number-violating oscillations i I. CPT Violation in Neutrino Oscillations and the Early Universe as an Alternative to Sterile Neutrinos II. Astrophysical Evidence A. Cosmology Sterile neutrino thermalization Big Bang Nucleosynthesis Cosmic microwave background and large-scale structure B. Core Collapse Supernovae III. Evidence from Oscillation Experiments A. The LSND Signal Description of the Experiment Event Selection Neutrino Oscillation Signal and Background Reactions LSND Oscillation Results B. The KARMEN Constraint Description of the Experiment Event Selection Neutrino Oscillation Signal and Background Reactions KARMEN Neutrino Oscillation Results C. Joint Analysis of LSND and KARMEN Data D. Sterile Neutrino Analysis of Super-K Comparison of ν µ → ν τ and ν µ → ν s Oscillations An Admixture Model E. The MiniBooNE ν e and νe Appearance Searches Description of the Experiment Neutrino Oscillation Event Selection Neutrino Oscillation Signal and Background Reactions MiniBooNE Neutrino Oscillation Results MiniBooNE Antineutrino Oscillation Results F. Disappearance Results from Accelerator Experiments

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“…This yields a DM mass of 1-2 eV, not the heavy mass of the hypothetical CDM particle. The best candidate is the neutrino with mass of 1.5 eV; a prediction that will be tested in the 2015 KATRIN tritium decay search (Weinheimer 2009). If also the right-handed (sterile) neutrinos were created in the early Universe, there should exist a 20% population of 1.5 eV neutrino hot dark matter, clumped at the scale of galaxy clusters and groups (Nieuwenhuizen 2009).…”

Section: Introductionmentioning

confidence: 99%

Do micro brown dwarf detections explain the galactic dark matter?

Nieuwenhuizen,

Schild,

Gibson

2010

Preprint

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Context. The baryonic dark matter dominating the structures of galaxies is widely considered as mysterious, but hints for it have been in fact detected in several astronomical observations at optical, infrared, and radio wavelengths. We call attention to the nature of galaxy merging, the observed rapid microlensing of a quasar, the detection of "cometary knots" in planetary nebulae, and the Lymanalpha clouds as optical phenomena revealing the compact objects. Radio observations of "extreme scattering events" and "parabolic arcs" and microwave observations of "cold dust cirrus" clouds are observed at 15 -20 K temperatures are till now not considered in a unifying picture. Aims. The theory of gravitational hydrodynamics predicts galactic dark matter arises from Jeans clusters that are made up of almost a trillion micro brown dwarfs (µBDs) of earth weight. It is intended to explain the aforementioned anomalous observations and to make predictions within this framework. Methods. We employ analytical isothermal modeling to estimate various effects.Results. Estimates of their total number show that they comprise enough mass to constitute the missing baryonic matter. Mysterious radio events are explained by µBD pair merging in the Galaxy. The "dust" temperature of cold galaxy halos arises from a thermostat setting due to a slow release of latent heat at the 14 K gas to solid transition at the µBD surface. The proportionality of the central black hole mass of a galaxy and its number of globular clusters is explained. The visibility of an early galaxy at redshift 8.6 is obvious with most hydrogen locked up in µBDs. Conclusions. Numerical simulations of various steps would further test the approach. It looks promising to redo MACHO searches against the Magellanic clouds.

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Direct determination of Neutrino Mass from Tritium Beta Spectrum

Cited by 4 publications

References 43 publications

Prediction for the neutrino mass in the KATRIN experiment from lensing by the galaxy cluster A1689

Prediction for the neutrino mass in the KATRIN experiment from lensing by the galaxy cluster A1689

Light Sterile Neutrinos: A White Paper

Do micro brown dwarf detections explain the galactic dark matter?

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