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The MiniBooNE Collaboration reports initial results from a search for $\bar{\nu}_{\mu}\to\bar{\nu}_e$ oscillations. A signal-blind analysis was performed using a data sample corresponding to $3.39 \times 10^{20}$ protons on target. The data…

高能物理 - 实验 · 物理学 2015-05-13 MiniBooNE Collaboration

While the mass differences between neutrino mass states are known, their absolute masses and mass hierarchy have not yet been determined. Determining the mass of neutrinos provides access to physics beyond the Standard Model and the…

The rest masses of the electron, the muon and of the stable mesons and baryons can be explained, within 1% accuracy, with the standing wave model, which uses only photons, neutrinos, charge and the weak nuclear force. We do not need…

综合物理 · 物理学 2009-09-29 E. L. Koschmieder

We reconsider neutrino decay as an explanation for atmospheric neutrino observations. We show that if the mass-difference relevant to the two mixed states \nu_\mu and \nu_\tau is very small (< 10^{-4} eV^2), then a very good fit to the…

高能物理 - 唯象学 · 物理学 2009-09-25 V. Barger , J. G. Learned , P. Lipari , M. Lusignoli , S. Pakvasa , T. J. Weiler

The relations between the effective Majorana mass of the electron neutrino, $m_{ee}$, responsible for neutrinoless double beta decay, and the neutrino oscillation parameters are considered. We show that for any specific oscillation pattern…

高能物理 - 唯象学 · 物理学 2009-10-31 H. V. Klapdor-Kleingrothaus , H. Päs , A. Y. Smirnov

Neutrino masses are yet unknown. We discuss the present state of effective electron anti-neutrino mass from $\beta$ decay experiments; effective Majorana neutrino mass from neutrinoless double-beta decay experiments; neutrino mass squared…

高能物理 - 实验 · 物理学 2023-10-31 Jyotsna Singh , M. Ibrahim Mirza

The long awaited experimental results from MiniBooNE have recently been announced. This experiment tests whether neutrino oscillations can occur at a higher mass squared difference $\sim1 {eV}^2$ compared to well established observations of…

科普物理 · 物理学 2008-11-26 Ranjan Laha , Sudhir K. Vempati

With a mass at least six orders of magnitudes smaller than the mass of an electron -- but non-zero -- neutrinos are a clear misfit in the Standard Model of Particle Physics. On the one hand, its tiny mass makes the neutrino one of the most…

核实验 · 物理学 2016-06-22 Susanne Mertens

On the basis of the so-called "yukawaon" model, we found out a special form of the neutrino mass matrix $M_\nu$ which gives reasonable predictions. The $M_\nu$ is given by a multiplication form made of charged lepton mass matrix $M_e$ and…

高能物理 - 唯象学 · 物理学 2015-05-28 Yoshio Koide , Hiroyuki Nishiura

We estimate constraints on the existence of a heavy, mostly sterile neutrino with mass between 10 eV and 1 TeV. We improve upon previous analyses by performing a global combination and expanding the experimental inputs to simultaneously…

高能物理 - 唯象学 · 物理学 2016-02-17 André de Gouvêa , Andrew Kobach

A search for nu_bar_mu to nu_bar_e oscillations has been conducted at the Los Alamos Meson Physics Facility using nu_bar_mu from mu+ decay at rest. The nu_bar_e are detected via the reaction (nu_bar_e,p) -> (e+,n), correlated with the 2.2…

The recent real time KARMEN anomaly for the electron neutrino counting rates (obtained from stopped muon decays) is analyzed by employing a neutrino flavor rotation model in which the muon neutrino is in a superposition of only two mass…

高能物理 - 唯象学 · 物理学 2007-05-23 Y. N. Srivastava , S. Palit , A. Widom , E. Sassaroli

We investigate in detail the possibility of constraining neutrino decays with data from the cosmic microwave background radiation (CMBR). Two generic decays are considered \nu_H -> \nu_L \phi and \nu_H -> \nu_L \nu_L_bar \nu_L. We have…

天体物理学 · 物理学 2009-10-31 Steen Hannestad

Several anomalies are discussed in neutrino physics, linked to the possible existence of light sterile neutrinos. These sterile neutrinos would not interact weakly, but they could leave an imprint in various measurements, such as neutrino…

高能物理 - 实验 · 物理学 2017-10-18 Julia Haser

We have determined theoretically the rest mass of the muon neutrino at 50 milli-eV and the rest mass of the electron neutrino at 5 meV, as well as, to 1% accuracy, the ratio of the masses of the stable elementary particles which decay by…

高能物理 - 格点 · 物理学 2007-05-23 E. L. Koschmieder , T. H. Koschmieder

Recent proposals to study the mass of the "electron" neutrino at a sensitivity of 0.3 eV can be used to place limits on the right handed and scalar charged currents at a level which improves on the present experimental limits. Indeed the…

高能物理 - 唯象学 · 物理学 2007-05-23 B. H. J. McKellar , M. Garbutt , G. J. Stephenson , T. Goldman

The determination of the absolute scale of the neutrino masses is one of the most challenging present questions in particle physics. The most stringent limit, $m(\bar{\nu}_{\mathrm{e}})<2$eV, was achieved for the electron anti-neutrino mass…

A search for muon anti-neutrino to electron anti-neutrino oscillations was conducted by the Liquid Scintillator Neutrino Detector at the Los Alamos Neutron Science Center using muon anti-neutrinos from positive muon decay at rest. A total…

Based on principles of the Expansive Nondecelerative Universe model that enables to quantify and localize the gravitational energy density, and stemming from the see-saw mechanism, the mass of electron, muon and tau neutrinos are determined…

广义相对论与量子宇宙学 · 物理学 2007-05-23 Miroslav Sukenik , Jozef Sima

Numerous recent measurements indicate an excess of counts near the endpoint of the electron energy spectrum in tritium decay. We show that this effect is expected if the neutrino is a tachyon. Results of calculations, based on a unitary…

高能物理 - 唯象学 · 物理学 2011-09-13 Jacek Ciborowski , Jakub Rembielinski