43 research outputs found
Quark-hadron duality in lepton scattering off nucleons
Quark-hadron (QH) duality in lepton scattering off nucleons is studied with
the resonance quark model. It is shown that in the case of neutrino scattering
off an isoscalar target the duality is simultaneously observed for charged and
neutral currents , , and weak
structure functions.
We demonstrate that the QH duality can be useful property for modeling
structure functions in the so-called resonance region. As an example it is
shown that combining relativistic quark model predictions with duality
arguments allows a construction of the inclusive resonance structure
function.Comment: 5 pages, 3 figures. Talk given at NuFact09, 11th International
Workshop on Neutrino Factories, Superbeams and Beta Beams, July 20-25, 2009;
IIT Chicago, US
Relevance of Two Boson Exchange Effect in Quasi-Elastic Charged Current Neutrino-Nucleon Interaction
Two boson exchange (TBE) correction to the cross section for the
quasi-elastic charged current and scattering is
evaluated. The TBE is given by box diagrams. The calculations are
performed for 1 GeV neutrinos. The averaged TBE correction is of the order of
(with respect to Born contribution) in the case of and
and in the case of and . The
impact of the TBE effect on the systematic discrepancy between the and
cross sections is discussed.Comment: 6 pages, 7 figure
Electroweak Single Pion Production and Form Factors of the \Delta(1232) Resonance
We extend and review our analysis of the nucleon \to \Delta(1232) transition
electroweak form factors from Ref. [1]. New fit of the \Delta(1232) vector form
factors to electron-proton scattering F_2 structure function is introduced as
well, leading to results different from the popular parametrization of Ref.
[2]. A clear model dependence of the extracted parameters emerges. Fit to
neutrino scattering data is performed in all available isospin channels. The
resulting axial mass is M_{A\Delta}=0.85^{+0.09}_{-0.08} (GeV) and $C_5^A(0) =
1.10^{+0.15}_{-0.14}. The latter value is in accordance with Goldberger-Treiman
relation as long as the deuteron effects are included.Comment: 10 pages, 5 figures. Proceedings of the CETUP*2014 workshop "Neutrino
Interactions", corrected versio