829 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
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
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
Critical Dynamics of a Two-dimensional Superfluid near a Non-Thermal Fixed Point
Critical dynamics of an ultracold Bose gas far from equilibrium is studied in
two spatial dimensions. Superfluid turbulence is created by quenching the
equilibrium state close to zero temperature. Instead of immediately
re-thermalizing, the system approaches a meta-stable transient state,
characterized as a non-thermal fixed point. A focus is set on the vortex
density and vortex-antivortex correlations which characterize the evolution
towards the non-thermal fixed point and the departure to final
(quasi-)condensation. Two distinct power-law regimes in the vortex-density
decay are found and discussed in terms of a vortex binding-unbinding transition
and a kinetic description of vortex scattering. A possible relation to decaying
turbulence in classical fluids is pointed out. By comparing the results to
equilibrium studies of a two-dimensional Bose gas, an intuitive understanding
of the location of the non-thermal fixed point in a reduced phase space is
developed.Comment: 11 pages, 13 figures; PRA versio
Rehydration of CTMA modified DNA powders observed by NMR
The rehydration of salmon sperm deoxyribonucleic acid (DNA) and cetyltrimethylammonium chloride complexes was observed using hydration kinetics, sorption isotherm, and high power proton relaxometry (at 30 MHz). The hydration kinetics shows (i) a very tightly bound water not removed by incubation over silica gel ( = 0.061 ± 0.004), (ii) a tightly bound water saturating at = 0.039 ± 0.011, with the hydration time = (1.04 ± 0.21) h, a loosely bound water fraction (iii) with the hydration time = (19.1 ± 3.2) h and the contribution progressively increasing with the air humidity. For the hydration at = 100%, after = (152.6 ± 2.5) h of incubation the swelling process begins. The swelling time was = (12.5 ± 5.4) h, and the swelling amplitude = 0.140 ± 0.016. The sorption isotherm is sigmoidal in form and is fitted by the Dent model with the mass of water saturating primary binding sites Δ M/ = 0.102 ± 0.021. Proton free induction decay is a superposition of the immobilized proton signal (Gaussian, with * ≈ 30 μs) and two liquid signal components coming from tightly bound (* ≈ 100 μs) and loosely bound water fraction with the amplitude proportional to the mass of water added (* ≈ 1000 μs)
Simulations from a new neutrino event generator
We construct a new Monte Carlo generator of events for neutrino interactions.
The dynamical models for quasi-elastic reactions, excitation and more
inelastic events described by the DIS formalism with the PDFs modified
according to recent JLab data are used. We describe in detail single pion
production channels, which combine the excitation and DIS
contribution. Many comparisons of the outcome of simulations with experimental
data are presented.Comment: To appear in the proceedings of 4th International Workshop on
Neutrino Nucleus Interactions in the Few GeV Region (NuInt05), Okayama,
Japan, 26-29 September, 200
Expression of hypoxia-inducible factor-1α and vascular density in mammary adenomas and adenocarcinomas in bitches
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