75,267 research outputs found
Checking T and CPT violation with sterile neutrino
Post LSND results, sterile neutrinos have drawn attention and motivated the
high energy physics, astronomy and cosmology to probe physics beyond the
standard model considering minimal 3+1 (3 active and 1 sterile) to 3+N neutrino
schemes. The analytical equations for neutrino conversion probabilities are
developed in this work for 3+1 neutrino scheme. Here, we have tried to explore
the possible signals of T and CPT violations with four flavor neutrino scheme
at neutrino factory. Values of sterile parameters considered in this analysis
are taken from two different types of neutrino experiments viz. long baseline
experiments and reactor+atmospheric experiments. In this work golden and
discovery channels are selected for the investigation of T violation. While
observing T violation we stipulate that neutrino factory working at 50 GeV
energy have the potential to observe the T violation signatures for the
considered range of baselines(3000 km-7500 km). The ability of neutrino factory
for constraining CPT violation is enhanced with increase in energy for normal
neutrino mass hierarchy(NH). Neutrino factory with the exposure time of 500
kt-yr will be able to capture CPT violation with GeV at 3 level for NH and for IH with GeV at 3 level
Effect of final state interactions on neutrino energy reconstruction at DUNE
We quantitatively study the percentage of fake events present in CCQE and
CCRes interactions and the impact of final state interactions on the neutrino
oscillation parameters at Dune. Resonance interaction will be the most dominant
interaction in the oscillation sensitive region of DUNE. The effect of
final-state interactions for DUNE oscillation physics is analysed in an ideal
and realistic detector scenario. The -disappearance Oscillation
channel is studied using LAr detector. We find that nuclear effects and
detector thresholds plays an significant role in CCQE and CCRes interactions
and these nuclear effects induces a significant bias in the determination of
atmospheric oscillation parameters. The impression of nuclear effects on the
determination of is quantified in this work.Comment: 8 pages, 9 figure
Further Series Studies of the Spin-1/2 Heisenberg Antiferromagnet at T=0: Magnon Dispersion and Structure Factors
We have extended our previous series studies of quantum antiferromagnets at
zero temperature by computing the one-magnon dispersion curves and various
structure factors for the linear chain, square and simple cubic lattices. Many
of these results are new; others are a substantial extension of previous work.
These results are directly comparable with neutron scattering experiments and
we make such comparisons where possible.Comment: 15 pages, 12 figures, revised versio
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