1,005 research outputs found
Looking for strangeness with neutrino-nucleon scattering
The possibility to determine the axial strange form factor of the nucleon
from elastic neutrino-nucleon scattering experiments is studied. The existing
experimental information is shortly mentioned and several observables which
could be measured in the near future at new neutrino facilities are discussed.Comment: 6 pages, 1 figure, contribution to : "NuFact 03", 5th International
Workshop on Neutrino Factories & Superbeams, Columbia University, New York,
5-11 June 200
Shear Viscosity of Quark Matter
We consider the shear viscosity of a system of quarks and its ratio to the
entropy density above the critical temperature for deconfinement. Both
quantities are derived and computed for different modeling of the quark
self-energy, also allowing for a temperature dependence of the effective mass
and width. The behaviour of the viscosity and the entropy density is argued in
terms of the strength of the coupling and of the main characteristics of the
quark self-energy. A comparison with existing results is also discussed.Comment: 15 pages, 4 figure
Conditions for detecting CP violation via neutrinoless double beta decay
Neutrinoless double beta decay data together with information on the absolute
neutrino masses obtained from the future KATRIN experiment and/or astrophysical
measurements give a chance to find CP violation in the lepton sector with
Majorana neutrinos. We derive and discuss necessary conditions which make
discovery of such CP violation possible for the future neutrino oscillation and
mass measurements data.Comment: 15 pages, 4 figures, RevTe
The ratio of scattering cross sections predicted from the global fit of elastic data
We present predictions for the value of the cross section ratio , determined from our fit of the elastic
cross section and polarization data. In this fit we took into account the
phenomenological two-photon exchange dispersive correction.
The cross section ratios which are expected to be measured by the VEPP-3
experiment are computed. The kinematical region which will be covered by the
E04-116 JLab experiment is also considered. It is shown that for both
experiments the predicted cross section ratios deviate from unity within more
than .Comment: 7 pages, 4 figure
An Analytic Approach to the Wave Packet Formalism in Oscillation Phenomena
We introduce an approximation scheme to perform an analytic study of the
oscillation phenomena in a pedagogical and comprehensive way. By using Gaussian
wave packets, we show that the oscillation is bounded by a time-dependent
vanishing function which characterizes the slippage between the mass-eigenstate
wave packets. We also demonstrate that the wave packet spreading represents a
secondary effect which plays a significant role only in the non-relativistic
limit. In our analysis, we note the presence of a new time-dependent phase and
calculate how this additional term modifies the oscillating character of the
flavor conversion formula. Finally, by considering Box and Sine wave packets we
study how the choice of different functions to describe the particle
localization changes the oscillation probability.Comment: 16 pages, 7 figures, AMS-Te
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