2,202 research outputs found
Predictions for pp single diffractive cross section at LHC
A model based on Gribov's Regge calculus was developed [1] and was proposed
to describe diffractive processes. In this note we present numerical vales
obtained from [1] for the dependence of single diffraction cross-section on
diffractive mass at = 0.9, 2.76 and 7 TeV
Description of soft diffraction in the framework of reggeon calculus. Predictions for LHC
A model, based on Gribov's Reggeon calculus, is proposed and applied to
processes of soft diffraction at high energies. It is shown that by accounting
for absorptive corrections for all legs of triple-Regge and loop diagrams a
good description of experimental data on inelastic soft diffraction can be
obtained. In this paper we give a brief description of the model and of its
predictions for LHC energies.Comment: Talk given at EDS'09 conferenc
Spectra of particles produced in high-mass diffraction dissociation in the Model of Quark-Gluon Strings
We calculate spectra of secondary particles produced in process of single
diffraction dissociation in the Model of Quark-Gluon Strings. For description
of diffractive dissociation process we use the reggeon model where all legs of
triple-reggeon diagrams are eikonalized. Numerical calculation shows that the
model gives a good description of data on charged particles pseudorapidity
distribution in single diffractive dissociation
Green functions for the TASEP with sublattice parallel update
We consider the totally asymmetric simple exclusion process (TASEP) in
discrete time with the sublattice parallel dynamics describing particles moving
to the right on the one-dimensional infinite chain with equal hoping
probabilities. Using sequentially two mappings, we show that the model is
equivalent to the TASEP with the backward-ordered sequential update in the case
when particles start and finish their motion not simultaneously. The Green
functions are obtained exactly in a determinant form for different initial and
final conditions.Comment: 11 pages, 4 figure
Role of gluons in soft and semi-hard multiple hadron production in pp collisions at LHC
Hadron inclusive spectra in pp collisions are analyzed within the modified
quark-gluon string model including both the longitudinal and transverse motion
of quarks in the proton in the wide region of initial energies. The
self-consistent analysis shows that the experimental data on the inclusive
spectra of light hadrons like pions and kaons at ISR energies can be
satisfactorily described at transverse momenta not larger than 1-2 GeV/c. We
discuss some difficulties to apply this model at energies above the ISR and
suggest to include the distribution of gluons in the proton unintegrated over
the internal transverse momentum. It leads to an increase in the inclusive
spectra of hadrons and allows us to extend the satisfactory description of the
data in the central rapidity region at energies higher than ISR.Comment: 19 pages, 20 figure
Diffraction dissociation in proton-proton collisions at = 0.9 TeV, 2.76 TeV and 7 TeV with ALICE at the LHC
The relative rates of single- and double- diffractive processes were measured
with the ALICE detector by studying properties of gaps in the pseudorapidity
distribution of particles produced in proton-proton collisions at =
0.9 TeV, 2.76 TeV and 7 TeV. ALICE triggering efficiencies are determined for
various classes of events, using a detector simulation validated with data on
inclusive particle production. Cross-sections are determined using van der Meer
scans to measure beam properties and obtain a measurement of the luminosity
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