31 research outputs found
A study of the double hadron neutrinoproduction on nuclei
The nuclear medium influence on the dihadron neutrinoproduction is
investigated for the first time, using the data obtained with SKAT bubble
chamber. An indication is obtained that the nuclear attenuation of the dihadron
is more expressed for kinematically closest hadron pairs. The experimental data
on the dihadron attenuation and on the ratio of the dihadron to single-hadron
yields are compared with predictions of the two-scale string fragmentation
model.Comment: 5 pages, 10 figure
Charged rho meson production in neutrino-induced reactions at E_nu = 10 GeV
The neutrinoproduction of charged mesons on nuclei and nucleons is
investigated for the first time at moderate energies ( 10
GeV), using the date obtained with SKAT bubble chamber. No strong nuclear
effects are observed in and production. The fractions of
charged and neutral pions originating from decays are obtained and
compared with higher energy data. From analysis of the obtained and available
data on and (892) neutrinoproduction, the strangeness
suppression factor in the quark string fragmentation is extracted: . Estimations are obtained for cross sections of quasiexclusive
single and coherent neutrinoproduction on nuclei. The
estimated coherent cross section = (0.29 cm is compatible with theoretical predictions.Comment: 7 pages, 6 figure
The total yields of K^+(892), Sigma^+(1385) and Sigma^0 in neutrino-induced reactions at <E_nu> = 10 GeV
Using the data obtained with SKAT bubble chamber, the total yields of
, and are estimated for the first time in
neutrino-induced reactions at moderate energies ( = 10.4 GeV). It is
shown, that the recently observed \cite{ref1,ref2} enhancement of the and
yields in interactions (as compared to interactions)
is contributed only slightly by the and production,
respectively. The decay contribution to the and yields is found
to be in qualitative agreement with higher energy ( 40 GeV) data.
It is shown, that the energy dependence of the mean multiplicity in
interactions is approximately linear in the range of 10-60 GeV, while that for in interactions (for
= 20-21) is approximately logarithmic in the range of
10-150 GeV.Comment: 6 pages, 3 figure
A study of the nuclear medium influence on transverse momentum of hadrons produced in deep inelastic neutrino scattering
The influence of nuclear effects on the transverse momentum
distributions of neutrinoproduced hadrons is investigated using the data
obtained with SKAT propane-freon bubble chamber irradiated in the neutrino beam
(with = 3-30 GeV) at Serpukhov accelerator. Dependences of of hadrons (more pronounced for the
positively charged ones) produced in the target fragmentation region at low
invariant mass of the hadronic system (2 4 GeV) or at low energies
transferred to the current quark (2 GeV). At higher or ,
no influence of nuclear effects on is observed. Measurement results
are compared with predictions of a simple model, incorporating secondary
intranuclear interactions of hadrons (with a formation length extracted from
the Lund fragmentation model), which qualitatively reproduces the main features
of the data.Comment: 23 pages, 7 figure
The A - dependence of and neutrinoproduction on nuclei
For the first time, the A- dependence of the production of ,
and, for comparison, mesons is investigated in neutrinonuclear
reactions, using the data obtained with SKAT bubble chamber. An exponential
parametrization () of the particle yields results in
for particles (combined and
), while for mesons the A- dependence is much weaker,
. A nuclear enhancement of the ratio
is found; this ratio increases from for -
interactions up to at and at
. It is observed, that the multiplicity rise of 's occures
predominantely in the backward hemisphere of the hadronic c.m.s. It is shown,
that the A- dependence of the nuclear enhancement of the and
yields can be reproduced in the framework of a model, incorporating the
secondary intranuclear interactions of pions originating from the primary - interactions, while only (299)% of that for at
can be attributed to intranuclear interactions.Comment: 18 pages, 8 figure
The yields of light meson resonances in neutrinonuclear interactions at <E_nu> = 10 GeV
The total yields of the all well-established light mesonic resonances (up to
the (1020) meson) are estimated in neutrinonuclear interactions at < E_nu
> = 10 GeV, using the data obtained with SKAT bubble chamber. For some
resonances, the yields in the forward and backward hemispheres in the hadronic
c.m.s. are also extracted. From the comparison of the obtained and available
higher-energy data, an indication is obtained that the resonance yields rise
almost linearly as a function of the mean mass of the neutrinoproduced
hadronic system. The fractions of pions originating from the light resonance
decays are inferred.Comment: 15 pages, 7 figure