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The neutrino mass can be extracted from a high statistics, high resolution calorimetric spectrum of electron capture in ${}^{163}$Ho. In order to better understand the shape of the calorimetric electron capture spectrum, a second isotope…

We propose a new application of the Extreme Value Theory for distributions with compact support. The novelty of our proposal is the use of these tools to estimate the neutrino mass from the energy spectrum of electrons in $\beta$-decay. In…

数据分析、统计与概率 · 物理学 2015-06-18 J. G. Esteve , F. Falceto

It is well known that the neutrino masses affect the shape of the energy spectrum of tritium beta-decay electrons. However, experiments have yet to measure that distortion. The Project 8 experiment proposes to measure the spectral…

核实验 · 物理学 2011-10-12 N. S. Oblath

Compelling evidences in favor of neutrino masses and mixing obtained in the last years in Super-Kamiokande, SNO, KamLAND and other neutrino experiments made the physics of massive and mixed neutrinos a frontier field of research in particle…

高能物理 - 唯象学 · 物理学 2008-11-26 S. M. Bilenky , C. Giunti , J. A. Grifols , E. Masso

In this paper, we emphasize why it is important for future neutrinoless double-beta ($0\nu\beta\beta$) decay experiments to reach the sensitivity to the effective neutrino mass $|m^{}_{\beta\beta}| \approx 1~{\rm meV}$. Assuming such a…

高能物理 - 唯象学 · 物理学 2020-04-22 Jun Cao , Guo-yuan Huang , Yu-Feng Li , Yifang Wang , Liang-Jian Wen , Zhi-zhong Xing , Zhen-hua Zhao , Shun Zhou

A new generation of neutrinoless double beta decay experiments with improved sensitivity is currently under design and construction. They will probe inverted hierarchy region of the neutrino mass pattern. There is also a revived interest to…

核理论 · 物理学 2015-06-05 Amand Faessler , Vadim Rodin , Fedor Simkovic

Electron capture can determine the electron neutrino mass, while the beta decay of Tritium measures the electron antineutrino mass and the neutrinoless double beta decay observes the Majorana neutrino mass. Electron capture e. g. on 163Ho…

核理论 · 物理学 2017-04-19 Amand Faessler , Loredana Gastaldo , Fedor Simkovic

In recent years, the progress on low temperature detector technologies has allowed design of large scale experiments aiming at pushing down the sensitivity on the neutrino mass below 1\,eV. Even with outstanding performances in both energy…

A large calorimetric neutrino mass experiment using thermal detectors is expected to play a crucial role in the challenge for directly assessing the neutrino mass. We discuss and compare here two approaches to the estimation of the…

高能物理 - 唯象学 · 物理学 2010-12-13 A. Nucciotti , E. Ferri , O. Cremonesi

We study the discovery potential of future beta decay experiments on searches for the neutrino mass in the sub-eV range, and, in particular, KATRIN experiment with sensitivity $m > 0.3$ eV. Effects of neutrino mass and mixing on the beta…

高能物理 - 唯象学 · 物理学 2014-11-17 Y. Farzan , O. L. G. Peres , A. Yu. Smirnov

A neutrino mass matrix is considered under conditions of a CP invariance and a small reactor mixing $\theta_{13}$ angle. Absolute mass values for three neutrinos are evaluated for normal and inverted hierarchy spectra on the ground of data…

高能物理 - 唯象学 · 物理学 2009-05-20 V. V. Khruschov

We discuss four approaches to the determination of absolute neutrino mass. These are the measurement of the zero-neutrino double beta decay rate, of the tritium decay end-point spectrum, of the cosmic ray spectrum above the GZK cutoff (in…

高能物理 - 唯象学 · 物理学 2009-11-07 H. Päs , T. J. Weiler

Taking into account mixings among neutrino states, the end of the energy spectrum of the electron in the tritium beta decay is investigated. It is shown that for real energy resolutions of a spectrometer, $ \Delta E > 0.08$ eV, the…

高能物理 - 唯象学 · 物理学 2016-08-16 J. Studnik , M. Zrałek

The properties of neutrinos and especially their rest mass play an important role at the intersections of cosmology, particle physics and astroparticle physics. At present there are two complementary approaches to address this topic in…

高能物理 - 实验 · 物理学 2019-08-13 Thomas Thümmler

Capturing low-energy electron antineutrinos on radioactive Ho-163 nuclei, which decay into Dy-163 via electron capture (EC), is a noteworthy opportunity to detect relic sterile antineutrinos. Such hypothetical particles are more or less…

宇宙学与河外天体物理 · 物理学 2015-05-27 Y. F. Li , Zhi-zhong Xing

The KATRIN experiment is designed to measure the absolute neutrino mass scale with a sensitivity of 200 meV at 90% C.L. by high resolution tritium beta-spectroscopy. A low background level of 10 mHz at the beta-decay endpoint is required in…

The investigation of the absolute scale of the effective neutrino mass remains challenging due to the exclusively weak interaction of neutrinos with all known particles in the standard model of particle physics. Currently, the most precise…

Nearly 70 years since the neutrino was discovered, and 25 years since discovery of neutrino oscillations established its non-zero mass, the absolute neutrino-mass scale remains unknown. Due to its unique characteristics, determining this…

核实验 · 物理学 2024-11-14 Larisa A. Thorne

Both active and sterile sub-eV neutrinos can serve for hot dark matter (DM). On the other hand, keV sterile neutrinos could be a good candidate for warm DM. The beta-decaying (e.g., H-3 and Ru-106) and EC-decaying (e.g., Ho-163) nuclei are…

高能物理 - 唯象学 · 物理学 2011-11-29 Y. F. Li , Zhi-zhong Xing

Neutrino oscillation experiments show that neutrinos have mass; however, the absolute mass scale is exceedingly difficult to measure and is currently unknown. A promising approach is to measure the energies of the electrons released during…

仪器与探测器 · 物理学 2024-01-09 Stafford Withington , Christopher Thomas , Songyuan Zhao