654 research outputs found
Modelling CC neutrino cross sections in the few GeV energy region
Selected problems in modelling neutrino-nucleon and -nuclei cross sections in
the neutrino energy region of the few GeV are reviewed.Comment: Presented by J.T. Sobczyk at the Cracow Epiphany Conference on
Neutrinos and Dark Matter, Jan. 5-8, 2006, Cracow, Polan
Comparison of predictions for nuclear effects in the Marteau model with the NUX+FLUKA scheme
Nuclear effects in neutrino-nucleus reactions simulated by means of the
NUX+FLUKA Monte Carlo generator are compared with the theoretical predictions
of the Marteau model. Pion absorption in NUX+FLUKA and non-pionic Delta decays
in the Marteau model differ by about 30%. The fraction of pions produced due to
the re-interactions after primary quasi-elastic vertex is in the NUX+FLUKA
scheme much higher then provided by the Marteau model.Comment: 6 pages, 8 figures, Presented by J.A. Nowak at the 3rd International
Workshop on Neutrino-Nucleus Interactions in the Few-GeV Region, 17-21 March,
Gran Sasso(Italy),to appear in the Proceeding
Classification of Low Dimensional Lie Super-Bialgebras
A thorough analysis of Lie super-bialgebra structures on Lie super-algebras
osp(1|2) and super-e(2) is presented. Combined technique of computer algebraic
computations and a subsequent identification of equivalent structures is
applied. In all the cases Poisson-Lie brackets on supergroups are found.
Possibility of quantizing them in order to obtain quantum groups is discussed.
It turns out to be straightforward for all but one structures for super-E(2)
group.Comment: 15 pages, LaTe
Wroclaw neutrino event generator
A neutrino event generator developed by the Wroclaw Neutrino Group is
described. The physical models included in the generator are discussed and
illustrated with the results of simulations. The considered processes are
quasi-elastic scattering and pion production modelled by combining the
resonance excitation and deep inelastic scattering.Comment: Talk given at 2nd Scandanavian Neutrino Workshop (SNOW 2006),
Stockholm, Sweden, 2-6 May 2006. 3 pages, 6 figure
WroNG -- Wroclaw Neutrino Generator of events for single pion production
We constructed a new Monte Carlo generator of events for neutrino CC single
pion production on free nucleon targets. The code uses dynamical models of the
DIS with the PDFs modified according to the recent JLab data and of the Delta
excitation. A comparison with experimental data was done in three channels for
the total cross sections and for the distributions of events in invariant
hadronic mass.Comment: 6 pages, 13 figures, Presented by J.T. Sobczyk at the 3rd
International Workshop on Neutrino-Nucleus Interactions in the Few-GeV
Region, 17-21 March, Gran Sasso(Italy),to appear in the Proceeding
Angular distributions in Monte Carlo event generation of weak single-pion production
One of the substantial sources of systematic errors in neutrino oscillation
experiments that utilize neutrinos from accelerator sources stems from a lack
of precision in modeling single-pion production (SPP). Oscillation analyses
rely on Monte Carlo event generators (MC), providing theoretical predictions of
neutrino interactions on nuclear targets. Pions produced in these processes
provide a significant fraction of oscillation signal and background on both
elementary scattering and detector simulation levels. Thus, it is of critical
importance to develop techniques that will allow us to accommodate
state-of-the-art theoretical models describing SPP into MCs.
In this work, we investigate various algorithms to implement single-pion
production models in Monte Carlo event generators. Based on comparison studies,
we propose a novel implementation strategy that combines satisfactory
efficiency with high precision in reproducing details of theoretical models
predictions, including pion angular distributions. The proposed implementation
is model-independent, thereby providing a framework that can include any model
for SPP. We have tested the new algorithm with the Ghent Low Energy Model for
single-pion production implemented in the NuWro Monte Carlo event generator.Comment: 13 pages, 8 figure
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