312 research outputs found
Open charm and beauty production in hadron reactions
The production of charmed and beauty hadrons in proton-proton and
proton-antiproton collisions at high energies is analyzed within the modified
quark-gluon string model (QGSM) including the internal motion of quarks in
colliding hadrons. It is shown that using both the QGSM and NLO QCD one can
describe the experimental data rather successfully in a wide region of
transverse momenta. We also present some predictions for the future experiments
on the beauty baryon production in collisions at LHC energies and on the
charmed meson production in reactions at GSI energies.Comment: 8 pages, 10 figures. Talk given at International Conference on Hadron
Structure (HS 09), Tatranska Strba, Slovak Republic, August 29th-September
3rd, 200
-dependence of backward pion multiplicity in neutrino-nucleus interactions
The production of pions emitted backward in inelastic neutrino-nucleus
interactions is analyzed within the impulse approximation in the framework of
the dual parton model. We focus on the -dependence of the multiplicity of
negative pions, normalized to the total cross section of the reaction . The inclusion of planar (one-Reggeon exchange) and cylindrical
(one-Pomeron exchange) graphs leads to a multiplicity that decreases as
increases, in agreement with recent measurements carried out at CERN by the
NOMAD collaboration. A realistic treatment of the high momentum tail of the
nucleon distribution in a nucleus also allows for a satisfactory description of
the semi-inclusive spectrum of backward pions.Comment: 15 pages, 4 figure
Self-consistent analysis of hadron production in and collisions at mid-rapidity
The self-consistent approach based on similarity of inclusive spectra of
hadrons produced in and collisions is reviewed. This approach allows
us to describe rather well the ratio of proton to anti-proton yields in
collisions as a function of the initial energy at a wide range from a few GeV
to a few TeV. We suggest its modification due to the quark-gluon dynamics to
describe the inclusive spectra of hadrons produced in collision as a
function of the transverse momentum at mid-rapidity. The extension of
this approach to analyze the pion -spectra produced in collision at
high and middle energies and mid-rapidity is given. The satisfactory
description of experimental data on these spectra in and collisions
within the offered approach is shown.Comment: 15 pages, 9 figures. arXiv admin note: substantial text overlap with
arXiv:1504.0784
Mid-rapidity dependence of hadron production in and collisions
The calculation of inclusive spectra of pions produced in and
collisions as a function of rapidity is presented within the
self-similarity approach. It is shown that at not large rapidities one can
obtain the analytical form of the self-similarity function
dependent of and hadron transverse momentum . A satisfactory
description of data on the rapidity spectra at 0.3 is illustrated
within a good agreement. The universal energy dependence of these spectra is
also shown.Comment: 6 pages, 3 figure
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