23 research outputs found
The -Region of Shadowing Corrections in Nucleon Structure Functions
We discuss the experimental indications on the behaviour of F_2(x,Q^2) at
small x both in proton and nuclear targets. By comparing the parametrizations
of the data we conclude that shadowing correction effects in a proton target
can appear at a noticeable level for x=(2 - 4)\times10^{-4} and Q^2\sim 10^1
GeV^2, namely inside the HERA regime.Comment: 5 pages, Latex, no figure
Production of Secondaries in High Energy d+Au Collisions
In the framework of Quark-Gluon String Model we calculate the inclusive
spectra of secondaries produced in d+Au collisions at intermediate (CERN SPS)
and at much higher (RHIC) energies. The results of numerical calculations at
intermediate energies are in reasonable agreement with the data. At RHIC
energies numerically large inelastic screening corrections (percolation
effects) should be accounted for in calculations. We extract these effects from
the existing RHIC experimental data on minimum bias and central d+Au
collisions. The predictions for p+Au interactions at LHC energy are also given.Comment: 18 pages and 10 figure
Production of secondaries in soft p+pb collisions at LHC
We calculate the inclusive spectra of secondaries produced in soft (minimum
bias) p+Pb collisions in the framework of Quark-Gluon String Model at LHC
energy, and by taking into account the inelastic screening corrections
(percolation effects). The role of these effects is expected to be very large
at very high energies, and they should decrease the spectra about 3 times in
the midrapidity region and increase them about 2 times in the fragmentation
region at the energy of LHC.Comment: 18 pages and 10 figures. arXiv admin note: text overlap with
arXiv:0802.219
Charmed particle production in hadron-hadron collision
In the framework of Quark--Gluon--String Model developed recently in ITEP we
calculate spectra of charmed particles , , , ,
in hadron--hadron collisions taking into account the decays of
--wave resonances like , , , , ,
, and . We describe the bulk of the existing data on ,
, and production in and collisions and predict
the yield of charmed particles in and reactions at hyperon
beam energies of and . Because of significant
production of baryon resonances our predictions for unfavored fragmentation
differ from predictions of other models which do not take resonance production
into account.Comment: Latex,19 pages, 12figs. can be received by reques
Fusion of strings and cosmic rays at ultrahigh energies
It is shown that the fusion of strings is a source of particle production in
nucleus--nucleus collisions outside the kinematical limits of nucleon--nucleon
collisions. This fact, together with another effect of string fusion, the
reduction of multiplicities, sheds some light on two of the main problems of
ultrahigh energy cosmic rays, the chemical composition and the energy of the
most energetic detected cosmic rays.Comment: LaTeX, 11 pages plus 3 figures in a separate postcript fil
Estimating the inelasticity with the information theory approach
Using the information theory approach, in both its extensive and nonextensive
versions, we estimate the inelasticity parameter of hadronic reactions
together with its distribution and energy dependence from and
data. We find that the inelasticity remains essentially constant in energy
except for a variation around , as was originally expected.Comment: 14 pages, 8 figures. Misprints correcte
Inclusive production at LHC energies
We consider the first LHC data for pp collisions in the framework of Regge theory. The integral cross sections and inclusive densities of secondaries are determined by the Pomeron exchange, and we present the corresponding predictions for them. The first measurements of inclusive densities in the midrapidity region are in agreement with these predictions. The contribution of the baryon-number transfer due to String Junction diffusion in the rapidity space is at the origin of the differences in the inclusive spectra of particle and antiparticle in the central region, and this effect could be significant at LHC energies. We discuss the first data of ALICE and LHCb collaborations on the baryon/antibaryon asymmetry at LHC