Predictions of the Quark–Gluon String Model for pp at LHC

Kaidalov, A.B.; Poghosyan, M. G.

doi:10.1140/epjc/s10052-010-1301-y

Cited by 39 publications

(49 citation statements)

References 39 publications

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“…For the model comparisons we have used QGSM [6], three different tunes of PYTHIA, tune D6T [9], tune ATLAS-CSC [10] and tune Perugia-0 [11], and PHO-JET [12]. The PYTHIA tunes have been developed by three independent groups extensively comparing Monte Carlo distributions to underlying-event and minimum-bias Tevatron [4] (stars) and to model predictions, PYTHIA tune D6T [9] (solid line) and PHOJET [12] (dashed line).…”

Section: Resultsmentioning

confidence: 99%

“…We have used the first high energy proton-proton collisions at the LHC at a centre-of-mass energy √ s = 2.36 TeV, as well as a larger statistics data sample at √ s = 0.9 TeV, to determine the pseudorapidity density of charged-primary particles, 1 dN ch /dη, in the central pseudorapidity region (|η| < 1.4). According to commonly used models [6][7][8][9][10][11][12], an increase in dN ch /dη of 17-22% for INEL events and of 14-19% for NSD events is expected in 2.36 TeV collisions relative to 0.9 TeV collisions.…”

Section: Introductionmentioning

confidence: 99%

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Charged-particle multiplicity measurement in proton–proton collisions at $\sqrt{s}=0.9$ and 2.36 TeV with ALICE at LHC

et al. 2010

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Charged-particle production was studied in proton-proton collisions collected at the LHC with the ALICE detector at centre-of-mass energies 0.9 TeV and 2.36 TeV in the pseudorapidity range |η| < 1.4. In the central region (|η| < 0.5), at 0.9 TeV, we measure charged-particle pseudo- for non-single-diffractive collisions. The relative increase in charged-particle multiplicity from the lower to higher energy is 24.7% ± 0.5%(stat.) +5.7 −2.8 %(syst.) for inelastic and 23.7% ± 0.5%(stat.) +4.6 −1.1 %(syst.) for non-single-diffractive interactions. This increase is consistent with that reported by the CMS collaboration for non-single-diffractive events and larger than that found by a number of commonly used models. The multiplicity distribution was measured in different pseudorapidity intervals and studied in terms of KNO variables at both energies. The results are compared to protonantiproton data and to model predictions.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Charged-particle multiplicity measurement in proton–proton collisions at $\sqrt{s}=0.9$ and 2.36 TeV with ALICE at LHC

et al. 2010

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“…, where σ Int. is the interaction crosssection (see for instance [18][19][20][21]). Up to LHC energies, σ Int.…”

Section: Introductionmentioning

confidence: 99%

Charged-particle multiplicities in proton–proton collisions at $$\sqrt{s} = 0.9$$ s = 0.9 to 8 TeV

Adam¹,

Adamová²,

Aggarwal³

et al. 2017

Eur. Phys. J. C

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A detailed study of pseudorapidity densities and multiplicity distributions of primary charged particles produced in proton-proton collisions, at √ s = 0.9, 2.36, 2.76, 7 and 8 TeV, in the pseudorapidity range |η| < 2, was carried out using the ALICE detector. Measurements were obtained for three event classes: inelastic, non-single diffractive and events with at least one charged particle in the pseudorapidity interval |η| < 1. The use of an improved track-counting algorithm combined with ALICE's measurements of diffractive processes allows a higher precision compared to our previous publications. A KNO scaling study was performed in the pseudorapidity intervals |η| < 0.5, 1.0 and 1.5. The data are compared to other experimental results and to models as implemented in Monte Carlo event generators PHOJET and recent tunes of PYTHIA6, PYTHIA8 and EPOS.

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“…Here diagram (a) shows the soft multi-Pomeron exchange, diagram (b) represents both hard and soft Pomeron exchange, diagrams (c) and (d) show the single diffractive (SD) process with small (c) and large (d) mass excitation, and diagrams (e)-(g) display double diffractive (DD) processes with large (e) and small (f) mass excitation, and central diffraction (g). The cross sections of SD and DD processes in pp collisions were calculated within the QGSM in [15]. In our MC version, we utilize the following parametrization of these results proposed in [16] …”

Section: The Qgsm Modelmentioning

confidence: 99%

Basic features of proton-proton interactions at ultra-relativistic energies and RFT-based quark-gluon string model

2017

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Abstract. Proton-proton collisions at energies from √ s = 200 GeV up to √ s = 14 TeV are studied within the microscopic quark-gluon string model. The model is based on Gribov's Reggeon Field Theory accomplished by string phenomenology. Comparison with experimental data shows that QGSM describes well particle yields, rapidity-and transverse momentum spectra, rise of mean �p T � and forward-backward multiplicity correlations. The latter arise in QGSM because of the addition of various processes with different mean multiplicities. The model also indicates fulfillment of extended longitudinal scaling and violation of Koba-Nielsen-Olesen scaling at LHC. The origin of both features is traced to short-range particle correlations in the strings. Predictions are made for √ s = 14 TeV.

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Predictions of the Quark–Gluon String Model for pp at LHC

Abstract: Soft multiparticle production processes in hadronic collisions are considered in the framework of the QuarkGluon Strings Model and the model predictions are compared with data from SppS and Tevatron. Predictions for LHC energies are given.

Cited by 39 publications

References 39 publications

Charged-particle multiplicity measurement in proton–proton collisions at $\sqrt{s}=0.9$ and 2.36 TeV with ALICE at LHC

Charged-particle multiplicity measurement in proton–proton collisions at $\sqrt{s}=0.9$ and 2.36 TeV with ALICE at LHC

Charged-particle multiplicities in proton–proton collisions at $$\sqrt{s} = 0.9$$ s = 0.9 to 8 TeV

Basic features of proton-proton interactions at ultra-relativistic energies and RFT-based quark-gluon string model

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