Different non-extensive models for heavy-ion collisions

Shen, Ke-Ming; Bı́ró, Tamás; Wang, En Ke

doi:10.1016/j.physa.2017.11.160

Cited by 22 publications

(30 citation statements)

References 26 publications

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“…which agrees with our previous work [21,22] and that of others [31]. T vs (q-1) in pp in pPb @ 5.02 TeV π in PbPb @ 2.76 TeV Note that the slope parameter T 1 in Table V turns negative and T 0 is nearly zero for the pp case, as discussed in [22]. Results of fittings on pion spectra, typically in pP b collisions at 5.02 TeV, fail in the obvious linear combinations probably due to the small mass of pions and high multiplicities.…”

Section: B Analysis Of the Pp B And P Bp B Resultssupporting

confidence: 94%

Hadron Spectra Parameters within the Non-Extensive Approach

2019

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We investigate how the non-extensive approach works in high-energy physics. Transverse momentum (pT ) spectra of several hadrons are fitted by various non-extensive momentum distributions and by the Boltzmann-Gibbs statistics. It is shown that some non-extensive distributions can be transferred one into another. We find explicit hadron mass and center-of-mass energy scaling both in the temperature and in the non-extensive parameter, q, in proton-proton and heavy-ion collisions. We find that the temperature depends linearly, but the Tsallis q follows a logarithmic dependence on the collision energy in proton-proton collisions. In the nucleus-nucleus collisions, on the other hand, T and q correlate linearly, as was predicted in our previous work.

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Section: B Analysis Of the Pp B And P Bp B Resultssupporting

confidence: 94%

Hadron Spectra Parameters within the Non-Extensive Approach

2019

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“…By going towards more central nucleus-nucleus collisions, though the overall shape of the fitted distribution describes the experimental data, the Data/Theory plot shows an increasing 'oscillation' [37,38]. This is a known effect and needs further investigation, and it also might be an indication that for future studies, especially in central heavy ion collisions a more sophisticated soft+hard model might be more appropriate [29,95,103]. However, studying of this oscillation effect goes beyond the scope of this paper.…”

Section: Fitting Procedures and Performancementioning

confidence: 96%

Tsallis-thermometer: a QGP indicator for large and small collisional systems

Bíró¹,

Barnaföldi²,

Bı́ró³

2020

J. Phys. G: Nucl. Part. Phys.

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The transverse momentum distribution of identified hadrons from recent years are analyzed within the thermodynamically consistent formulation of nonextensive statistics. A wide range of center-of-mass energies and average event multiplicities are studied for various hadron species. We demonstrate that the average event multiplicity is a key variable in the study of high-energy collisions and a smooth transition in the description from small to large systems is possible. For this purpose the non-extensive statistical approach is more than appropriate. The validity of the non-extensive description is explored in multiple ways: such as the calculation of integrated yields per unit rapidity, the analysis of radial flow and the consistency check of the thermodynamical variables. The 'Tsallis-thermometer' is introduced as an indicator of quark-gluon plasma in small collisional systems.

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“…During the investigation of the parameters, we showed that they possess non-trivial relations such as mass-and energy scaling [1,8]. There are also implications that for larger systems a soft-hard extension is needed [10,16]. These studies indicate that increasing the size of the colliding system (roughly speaking, the volume of the quark-gluon plasma) may also reflect in the parameters.…”

Section: Introductionmentioning

confidence: 90%

“…With the appearance of high precision experimental data spanning from low-to high-p T , neither the thermal models with a bare Boltzmann-Gibbs exponential distribution nor perturbative Quantum Chromodynamics (pQCD)-motivated power-law distributions are able to describe the whole spectrum. On the other hand, the Tsallis-Pareto distributions combine these two regions perfectly (see, e.g., [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15][16] and references therein). During the investigation of the parameters, we showed that they possess non-trivial relations such as mass-and energy scaling [1,8].…”

Section: Introductionmentioning

confidence: 99%

Multiplicity Dependence in the Non-Extensive Hadronization Model Calculated by the HIJING++ Framework

et al. 2019

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The non-extensive statistical description of the identified final state particles measured in high energy collisions is well-known by its wide range of applicability. However, there are many open questions that need to be answered, including but not limited to, the question of the observed mass scaling of massive hadrons or the size and multiplicity dependence of the model parameters. This latter is especially relevant, since currently the amount of available experimental data with high multiplicity at small systems is very limited. This contribution has two main goals: On the one hand we provide a status report of the ongoing tuning of the soon-to-be-released HIJING++ Monte Carlo event generator. On the other hand, the role of multiplicity dependence of the parameters in the non-extensive hadronization model is investigated with HIJING++ calculations. We present cross-check comparisons of HIJING++ with existing experimental data to verify its validity in our range of interest as well as calculations at high-multiplicity regions where we have insufficient experimental data.

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Different non-extensive models for heavy-ion collisions

Cited by 22 publications

References 26 publications

Hadron Spectra Parameters within the Non-Extensive Approach

Hadron Spectra Parameters within the Non-Extensive Approach

Tsallis-thermometer: a QGP indicator for large and small collisional systems

Multiplicity Dependence in the Non-Extensive Hadronization Model Calculated by the HIJING++ Framework

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