Elliptic flow of hadrons in equal-velocity quark combination mechanism in relativistic heavy-ion collisions

Li, Haihong; Shao, Feng-lan

doi:10.1140/epjc/s10052-020-08760-8

Cited by 9 publications

(7 citation statements)

References 57 publications

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“…This indicates the important role of constituent quarks and antiquarks as the effective degrees of freedom of the hot nuclear matter at hadronization stage and their equal-velocity combination as the main feature of hadron formation in relativistic heavy-ion collisions. The current study is consistent with our previous works in studying the elliptic flow of these hadrons and the quark number scaling property of p T spectra of Ω − and φ in relativistic heavy-ion collisions at RHIC and LHC energies using the same quark combination mechanism [42,43].…”

Section: Summary and Discussionsupporting

confidence: 91%

Averaged transverse momentum correlations of hadrons in relativistic heavy-ion collisions

Feng,

Shao,

Song

2022

Preprint

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We compile experimental data for the averaged transverse momentum ( pT ) of proton, Λ, Ξ − , Ω − and φ at mid-rapidity in Au+Au collisions at 200, 39, 27, 19.6, 11.5, 7.7 GeV and in Pb+Pb collisions at √ sNN = 2.76 TeV, and find that experimental data of these hadrons exhibit systematic correlations. We apply a quark combination model with equal-velocity combination approximation to derive analytic formulas of hadronic pT in the case of exponential form of quark pT spectra at hadronization. We use them to successfully explain the systematic correlations exhibited in pT data of pΛ, ΛΞ − , Ξ − Ω − and Ξ − φ pairs. We also use them to successfully explain the regularity observed in pT of these hadrons as the function of (dN ch /dy)/(Npart/2) at mid-rapidity in central heavy-ion collisions at both RHIC and LHC energies. Our results suggest that the constituent quark degrees of freedom and the equal-velocity combination of these constituent quarks at hadronization play important role in understanding the production of baryons and φ meson at these RHIC and LHC energies.

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Section: Summary and Discussionsupporting

confidence: 91%

Averaged transverse momentum correlations of hadrons in relativistic heavy-ion collisions

Feng,

Shao,

Song

2022

Preprint

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“…The model has successfully described the spectra of light-flavor hadrons and single-charmed hadrons in the ground state, for the collisions at TeV and Pb collisions at TeV. Our latest studies on the elliptic flow and spectra of hadrons in relativistic heavy-ion collisions [36][37][38][39] also support the EVC model.…”

Section: Introduction Pp P Pp P Pp Pmentioning

confidence: 53%

Production of light-flavor and single-charmed hadrons in pp collisions at TeV in an equal-velocity quark combination model *

Shao

2021

Chinese Phys. C

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We apply an equal-velocity quark combination model to study the production of light-flavor hadrons and single-charmed hadrons at midrapidity in the collisions at TeV. We find that the experimental data for the spectra of and exhibit the quark number scaling property, which clearly indicates the quark combination mechanism at hadronization. Experimental data for the spectra of , , , , , and are systematically described by the model. The non-monotonic dependence of the ratio is naturally explained, and we find that it is closely related to the shape of the logarithm of the strange quark distribution. Using the spectra of light-flavor quarks obtained from light-flavor hadrons and the spectrum of charm quarks, which is consistent with perturbative QCD calculations, the experimental data for differential cross-sections of , , and as functions of are systematically described. We predict the differential cross-sections of and . The ratio in our model is approximately 0.16, and is approximately 0.012, owing to the cascade suppression of strangeness. In addition, the predicted and ratios exhibit the non-monotonic dependence on in the low range.

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“…The model has successfully described p T spectra of light-flavor hadrons and single-charmed hadrons in ground state in pp collisions at √ s = 7, 13 TeV and in pPb collisions at √ s N N = 5.02 TeV. Our latest studies on elliptic flow and p T spectra of hadrons in relativistic heavy-ion collisions [36][37][38][39] also support the EVC model .…”

Section: A Brief Introduction Of Equal-velocity Quark Combination Modelmentioning

confidence: 57%

Production of light flavor and single-charmed hadrons in $pp$ collisions at $\sqrt{s}=5.02$ TeV in an equal-velocity quark combination model

Li,

Shao,

Song

2021

Preprint

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We apply an equal-velocity quark combination model to study the production of light-flavor hadrons and single-charmed hadrons at midrapidity in pp collisions at √ s = 5.02 TeV. We find experimental data for pT spectra of Ω and φ exhibit a quark number scaling property, which is a clear signal for quark combination mechanism at hadronization. Experimental data of p , Λ, Ξ, Ω, φ and K * 0 are systematically described by the model. The non-monotonic pT dependence of Ω/φ ratio can be naturally explained using only combination mechanism and we find it is closely related to the concave/convex shape of the logarithm of strange quark pT spectrum. Using pT spectra of light-flavor quarks extracted from light-flavor hadrons and a charm quark distribution which is consistent with perturbative QCD calculations, the differential cross-sections of D 0,+ , D + s and Λ + c as the function of pT are systematically described. We predict the differential cross-sections of Ξ 0,+ cand Ω 0 c . The ratio Ξ 0,+ c /D 0 in our model is about 0.16 and Ω 0 c /D 0 is about 0.012 due to the cascade suppression of strangeness. In addition, ratios Ξ 0,+ c /D 0 and Ω 0 c /D 0 exhibit the non-monotonic dependence on pT in the low and intermediate pT range.

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Elliptic flow of hadrons in equal-velocity quark combination mechanism in relativistic heavy-ion collisions

Abstract: We apply a quark combination model with equal-velocity combination (EVC) approximation to study the elliptic flow ($$v_{2}$$ v 2 ) of hadrons in heavy-ion collisions in a wide collision energy range ($$\sqrt{s_{NN}}=$$ s NN … Show more

Cited by 9 publications

References 57 publications

Averaged transverse momentum correlations of hadrons in relativistic heavy-ion collisions

Averaged transverse momentum correlations of hadrons in relativistic heavy-ion collisions

Production of light-flavor and single-charmed hadrons in pp collisions at TeV in an equal-velocity quark combination model *

Production of light flavor and single-charmed hadrons in $pp$ collisions at $\sqrt{s}=5.02$ TeV in an equal-velocity quark combination model

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