Mean transverse momenta correlations in hadron-hadron collisions in MC toy model with repulsing strings

Altsybeev, I.

doi:10.1063/1.4938711

Cited by 9 publications

(6 citation statements)

References 12 publications

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“…This should give not only enhanced transverse momenta, in particular for high mass particles, but would also give rise to angular correlations. Such correlations were early considered by Abramovsky et al [29], and a Monte Carlo "toy model" studying this effect in PbPb collisions was presented in [30].…”

Section: Introduction -mentioning

confidence: 99%

Collectivity without plasma in hadronic collisions

2018

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We present a microscopic model for collective effects in high multiplicity proton-proton collisions, where multiple partonic subcollisions give rise to a dense system of strings. From lattice calculations we know that QCD strings are transversely extended, and we argue that this should result in a transverse pressure and expansion, similar to the flow in a deconfined plasma. The model is implemented in the PYTHIA8 Monte Carlo event generator, and we find that it can qualitatively reproduce the long range azimuthal correlations forming a near-side ridge in high multiplicity proton-proton events at LHC energies.

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Section: Introduction -mentioning

confidence: 99%

Collectivity without plasma in hadronic collisions

2018

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“…[32], includes the decrease in the effective string tension and, therefore, should lead to the string repulsion (see also Ref. [33]).…”

Section: Fusion and The Kinetic Energy Of Stringsmentioning

confidence: 99%

“…It creates distinct directions of motion in the transverse plane for particles originating from the rearranged colour field. This approach originates from the pioneering paper [32] and has already been tested in more recent models [33,34]. The interplay of these two mechanisms, driven by string fusion, allows one to obtain specific joint correlations in pseudorapidity and azimuthal angle, η and φ, respectively, of the same origin in collision systems of different types.…”

Section: Introductionmentioning

confidence: 99%

Emergent Flow Signal and the Colour String Fusion

Prokhorova,

Andronov

2024

Physics

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In this study, we develop the colour string model of particle production, based on the multi-pomeron exchange scenario, to address the controversial origin of the flow signal measured in proton–proton inelastic interactions. Our approach takes into account the string–string interactions but does not include a hydrodynamic phase. We consider a comprehensive three-dimensional dynamics of strings that leads to the formation of strongly heterogeneous string density in an event. The latter serves as a source of particle creation. The string fusion mechanism, which is a major feature of the model, modifies the particle production and creates azimuthal anisotropy. Model parameters are fixed by comparing the model distributions with the ATLAS experiment proton–proton data at the centre-of-mass energy s=13 TeV. The results obtained for the two-particle angular correlation function, C(Δη,Δϕ), with Δη and Δϕ differences in, respectively, pseudorapidities and azimuthal angles between two particles, reveal the resonance contributions and the near-side ridge. Model calculations of the two-particle cumulants, c2{2}, and second order flow harmonic, v2{2}, also performed using the two-subevent method, are in qualitative agreement with the data. The observed absence of the away-side ridge in the model results is interpreted as an imperfection in the definition of the time for the transverse evolution of the string system.

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“…In the pp community, much attention have been given to models of final state interactions including colour reconnections, rope hadronisation and junction formation [67][68][69]. These models have, in pp been shown to reproduce: the enhancement of strange hadrons to non-strange hadrons in dense environments [70]; flowlike effects in hadron ratios as function of p ⊥ ; and preliminary studies have shown that interactions between strings can produce a ridge [71].…”

Section: Outlook: Modelling Collective Effectsmentioning

confidence: 99%

Diffractive and non-diffractive wounded nucleons and final states in pA collisions

Bierlich

Gustafson

Lönnblad

2016

J. High Energ. Phys.

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Abstract:We review the state-of-the-art of Glauber-inspired models for estimating the distribution of the number of participating nucleons in pA and AA collisions. We argue that there is room for improvement in these model when it comes to the treatment of diffractive excitation processes, and present a new simple Glauber-like model where these processes are better taken into account. We also suggest a new way of using the number of participating, or wounded, nucleons to extrapolate event characteristics from pp collisions, and hence get an estimate of basic hadronic final-state properties in pA collisions, which may be used to extract possible nuclear effects. The new method is inspired by the Fritiof model, but based on the full, semi-hard multiparton interaction model of Pythia8.

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Mean transverse momenta correlations in hadron-hadron collisions in MC toy model with repulsing strings

Cited by 9 publications

References 12 publications

Collectivity without plasma in hadronic collisions

Collectivity without plasma in hadronic collisions

Emergent Flow Signal and the Colour String Fusion

Diffractive and non-diffractive wounded nucleons and final states in pA collisions

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