The neutrino was first postulated in 1931 by Wolfgang Pauli to explain the energy spectrum of beta decays, the decay of a neutron into a proton and an electron. Pauli theorized that an undetected particle was carrying away the observed difference between the energy and angular momentum of the i...
Therefore the channel with the electron neutrino: π+→ e+νe is suppressed as ∝mee2/mμ2. Also coherence between νμ and small admixture of νe is lost almost immediately due to difference of kinematics. 3) Tau neutrino. Enriched ντ –flux can be obtained in the beam-dump ...
(positron), is created during the decay of the nucleus of an atom. A beta particle is emitted from the nucleus of an atom duringradioactive decay. The atomic electron, however, occupies regions outside the nucleus of an atom. The beta particle, like the electron, has a very small mass ...
et al. Precise measurement of the neutrino mixing parameter y23 from muon neutrino disappearance in an off-axis beam. Phys. Rev. Lett. 112, 181801 (2014). 60. Abe, K. et al. Indication of electron neutrino appearance from an accelerator- produced off-axis muon neutrino beam. Phys. Rev....
Neutrinoless double beta decay experiments seek to determine the nature of the neutrinos as Majorana or not. These experiments have so far set limits on the effective electron neutrino mass [76] , where withUrepresenting . In all the four mixing scenarios predicted by the model, Eqs. (35), ...
through parallel arrays of strings. Acoustic detectors will be installed on each string for high-precision position calibration. These detectors can also be placed sparsely in an array extended beyond the main detector volume, to detect cosmogenic neutrinos with energies well above exaelectronvolts44,...
within a 19.2 μs window starting 4.4 μs before the 1.6 μs long beam spill. The energy of an event is related to the total amount of light observed.νμandνeevents are identified by the flavour (muon or electron) of the lepton in the final state CC interaction. Muons are ...
Alexopoulos et al., "Observa- tion of muon neutrino disappearance with the MINOS detec- tors in the NuMI neutrino beam," Physical Review Letters, vol. 97, no. 19, article 191801, 2006. [13] K. Abe, J. Adam, H. Aihara et al., "Observation of electron neutrino appearance in a ...
For example, an electron neutrino produced in a beta decay reaction may interact in a distant detector as a muon or tau neutrino.[6][7] Although only differences between squares of the three mass values are known as of 2019,[8] cosmological observations imply that the sum of the three ...
Proton beamBeta decayAnti-neutrinosReactor anomalyThe nuclear fission process that occurs in the core of nuclear reactors results in unstable, neutron-rich fission products that subsequently beta decay and emit electron antineutrinos. These reactor neutrinos have served neutrino physics research from the ...