501 research outputs found
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
Cross-section and polarization of neutrino-produced 's made simple
Practical formulae are derived for the cross-section and polarization of the
lepton produced in deep-inelastic neutrino-nucleon scattering in the
frame of the simple quark-parton model.Comment: 10 pages, no figure
axial form factor from bubble chamber experiments
A careful reanalysis of both Argonne National Laboratory and Brookhaven
National Laboratory data for weak single pion production is done. We consider
deuteron nuclear effects and normalization (flux) uncertainties in both
experiments. We demonstrate that these two sets of data are in good agreement.
For the dipole parametrization of , we obtain , GeV. As an application we present the discussion of
the uncertainty of the neutral current 1 production cross section,
important for the T2K neutrino oscillation experiment.Comment: 16 pages, 8 figures, 2 table
Electromagnetic form factors of the nucleon: new fit and analysis of uncertainties
Electromagnetic form factors of proton and neutron, obtained from a new fit
of data, are presented. The proton form factors are obtained from a
simultaneous fit to the ratio determined from
polarization transfer measurements and to elastic cross section data.
Phenomenological two-photon exchange corrections are taken into account. The
present fit for proton was performed in the kinematical region
GeV. Both for protons and neutrons we use the latest available data. For
all form factors the uncertainties and correlations of form factor parameters
are investigated with the method.Comment: 18 pages, 12 figure
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