The strongly intensive observable in pp collisions at LHC energies in the string fusion model

Vechernin, V.; Belokurova, Svetlana

doi:10.1088/1742-6596/1690/1/012088

Cited by 6 publications

(5 citation statements)

References 19 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…We substitute into Equation (1) the parameters from Ref. [48], where it is assumed that strings that were initially formed in an event can overlap to various degrees and fuse, forming the string clusters with the modified fragmentation characteristics, which changes the obtained multiplicity. This is in contrast to another approach used in Ref.…”

Section: Multi-pomeron Exchange In Pp Collisionsmentioning

confidence: 99%

See 1 more Smart Citation

Emergent Flow Signal and the Colour String Fusion

Prokhorova,

Andronov

2024

Physics

View full text Add to dashboard Cite

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.

show abstract

Section: Multi-pomeron Exchange In Pp Collisionsmentioning

confidence: 99%

“…Therefore, there are a number of free strings in Ref. [48] and a number of string clusters in Ref. [49].…”

Section: Multi-pomeron Exchange In Pp Collisionsmentioning

confidence: 99%

Emergent Flow Signal and the Colour String Fusion

Prokhorova,

Andronov

2024

Physics

View full text Add to dashboard Cite

show abstract

“…The values of these parameters are taken from Ref. [8], where one assumes that the number of primary strings in an event (related to n pom from Equation (1)) is initially formed, and then, some of them can fuse, forming the string clusters with the modified fragmentation characteristics. This framework can be viewed as a three-step scenario: first, strings are produced; then, they interact (fusion); lastly, the strings hadronisation occurs.…”

Section: Multi-pomeron Exchange In Pp Collisionsmentioning

confidence: 99%

Interacting Colour Strings Approach in Modelling of Rapidity Correlations

Prokhorova

Andronov

Феофилов

2023

Physics

View full text Add to dashboard Cite

In this paper, using the concept of multi-pomeron exchange, we develope a Monte Carlo model of interacting quark–gluon strings acting as particle-emitting sources aimed at describing inelastic proton–proton interactions at high energies. The implemented 3D (three-dimensional) dynamics of colour string formation resulted in their finite length in the rapidity space and in the fluctuating event-by-event spatial density. Thus, this results in string cluster formation because of the fusion mechanism and the appearance of long-range multiplicity and mean transverse momentum (mean-pT) correlations in rapidity. We study, via the pseudorapidity dependence, the sensitivity to the details of the 3D dynamical formation of strings for several observables such as the forward–backward correlation coefficient value, strongly intensive quantity, Σ, and the “almost” strongly intensive observable, the variance, σC2, of the distribution of the asymmetry coefficient, C. The strongly intensive quantity Σ is used in this study to suppress trivial statistical fluctuations in the number of particles emitting similar types of sources and to reveal the intrinsic fluctuations of a single source. We demonstrate the connection between Σ and such often used observables as cumulants, factorial cumulants, and σC2. We stress the importance of the contribution of “short” strings and the event asymmetry of the initial conditions on the long-range correlation measures. We argue that string cluster formation because of the fusion mechanism explains the collective effects seen in multiplicity and transverse momentum–multiplicity, ⟨pT⟩–N, long-range correlation functions.

show abstract

“…Further on, this subject of strangeness production in the hadronic collisions was the focus of many theoretical studies. In particular, they proposed the string fusion model [48,[58][59][60], which was widely used for the analysis of data on multi-particle production and explanation of enhanced yields of strange and multi-strange particles in heavy-ion collisions in [27][28][29][30]51,[61][62][63][64][65][66].…”

Section: Motivation For Extended Multipomeron Exchange Modelmentioning

confidence: 99%

“…Studies of these long-range correlations require the minimization of trivial effects relevant to the trivial, so-called volume fluctuations. In order to eliminate their influence in the analysis of collisions, strongly intensive observables were proposed in [66,[69][70][71] and, remarkably, strongly intensive observable Σ, characterizing correlations between the number of particles produced in two observation windows separated by a rapidity interval, was found in [52,53,65,66,[71][72][73] to be sensitive to the formation of strings of different types.…”

Section: Motivation For Extended Multipomeron Exchange Modelmentioning

confidence: 99%

Multipomeron Model with Collective Effects for High-Energy Hadron Collisions

et al. 2022

View full text Add to dashboard Cite

We propose the generalized multipomeron exchange model for multiparticle production in high-energy proton–proton, proton–nucleus and heavy-ion collisions. For all of these systems, we consider collectivity effects based on the quark–gluon string fusion concept, where new types of particle-emitting sources—strings with higher tension—are produced. We obtained the model parameters using the data on the multiplicity dependence of the mean transverse momentum of charged particles in pp and pp¯ collisions over a wide energy range (from ISR to LHC). We calculated the yields of strange, multi-strange and charm particles as a function of multiplicity for pp, p-Pb and Pb-Pb collisions at the LHC energy and compared the results with the experimental data.

show abstract

The strongly intensive observable in pp collisions at LHC energies in the string fusion model

Cited by 6 publications

References 19 publications

Emergent Flow Signal and the Colour String Fusion

Emergent Flow Signal and the Colour String Fusion

Interacting Colour Strings Approach in Modelling of Rapidity Correlations

Multipomeron Model with Collective Effects for High-Energy Hadron Collisions

Contact Info

Product

Resources

About