There is renewed interest in performing a long baseline neutrino oscillation experiment using accelerator neutrinos because of a discrepancy between the measured and the predicted values of the ratio of electron to muon neutrinos produced in the upper atmosphere by cosmic rays. The approximate range in oscillation parameter space indicated by the Kamiokande atmospheric neutrino results and conf...

We examine the possible tests of violation of the gravitational equivalence principle (VEP) at a muon storage ring via neutrino oscillation experiments. If different neutrino flavours couple to the gravitational potential with different strength, flavour eigenstates are no longer the gravitational interaction eigenstates. This leads to the neutrino oscillation. If one starts with μ beam then ap...

We argue three-flavour neutrino mixing. We consider the neutrinos as Majorana particles and see how the neutrinoless double beta decay constrains the neutrino mixing angles. Our formulation is widely valid and is applied to the neutrino oscillation experiment.

We perform a phenomenological analysis of neutrino oscillation in a four generation framework introducing an additional sterile neutrino. In such a scenario, more than one pattern is possible that can accommodate three hieararchically different mass squared differences as required by the present experiments. We considered two different spectrums. Choosing the ∆ms in the ranges suitable for the ...

Uncertainties in knowledge of neutrino interactions directly impact the ability to measure the parameters of neutrino oscillation. Experiments which make use of differing technologies and neutrino beams are sensitive to different uncertainties.

Recent evidence for neutrino oscillations has revolutionized the study of neutrino masses and mixing. This report gives an overview of what we are learning from the neutrino oscillation experiments, the prospects for the near term, and the bright future of neutrino mass studies. I NEUTRINO COUNTING How many neutrinos are there? Neutrino counting at LEP of Z → νν̄ decays obtains Nν = 3 active fla...

Although the evidence for neutrino oscillation is growing year after year, the final proof that the observed anomalies are due to oscillation is still outstanding. Alternative models (neutrino decay, potential decoherence effect, influence of large extra-dimensions) to explain the SuperKamiokande (SK) atmospheric neutrinos results have been proposed. On the experimental side, as pointed out als...

A large number of experiments of different types have provided strong evidence for neutrino oscillations and thus for physics beyond the Standard Model (see Ref. [1] and references therein). Cosmic ray interactions in the atmosphere give a natural source of neutrinos. These atmospheric neutrinos in the GeV range have been used by the Super-Kamiokande (SK) detector to provide evidence for neutri...

We comment on the paper ”On application of the time-energy uncertainty relation to Mössbauer neutrino experiments” (see arXiv: 0803.1424) in which our paper ”Time-energy uncertainty relations for neutrino oscillation and Mössbauer neutrino experiment” (see arXiv: 0803.0527) has been criticized. We argue that this critique is a result of misinterpretation: The authors of (arXiv: 0803.1424) do no...

Recent results of atmospheric neutrino experiments are reviewed and their possible interpretations are discussed, main emphasis being put on the neutrino oscillation hypothesis.