ϕ meson production in <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si1.gif" overflow="scroll"><mml:mi mathvariant="normal">Au</mml:mi><mml:mo>+</mml:mo><mml:mi mathvariant="normal">Au</mml:mi></mml:math> and <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si2.gif" overflow="scroll"><mml:mi>p</mml:mi><mml:mo>+</mml:mo><mml:mi>p</mml:mi></mml:math> collisions at <mml:math xmlns:mml="http://www.w3.org/1998/Math/MathML" altimg="si3.gif" overflow="scroll"><mml:msqrt><mml:msu

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doi:10.1016/j.physletb.2004.12.082

Cited by 173 publications

(106 citation statements)

References 38 publications

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“…The decay pions tend to flatten the K + /π + ratio at RHIC. We obtain predict more rise of φ/K + than is observed at RHIC [42], but our variation is within the error bar of the experimental, nearly constant result, φ/K + = 0.15±0.03. As discussed earlier, the overall increase in s/S expected at LHC (right side) compared to RHIC (left side) explains the noticeably greater relative K + /π + ratios at LHC.…”

Section: B Strange Particle Yields As Function Of Centralitysupporting

confidence: 67%

Strangeness chemical equilibration in a quark-gluon plasma

Letessier

Rafelski

2007

Phys. Rev. C

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We study, in the dynamically evolving QGP fireball formed in relativistic heavy ion collisions at RHIC and LHC, the growth of strangeness yield toward and beyond the chemical equilibrium. We account for the contribution of the direct strangeness production and evaluate the thermal-QCD strangeness production mechanisms. The specific yield of strangeness per entropy,s/S, is the primary target variable. We explore the effect of collision impact parameter, i.e., fireball size, on kinetic strangeness chemical equilibration in QGP. Insights gained in study the RHIC data with regard to the dynamics of the fireball are applied to the study strangeness production at the LHC. We use these results and consider the strange hadron relative particle yields at RHIC and LHC in a systematic fashion. We consider both the dependence on s/S and directly participant number dependence.

show abstract

Section: B Strange Particle Yields As Function Of Centralitysupporting

confidence: 67%

Strangeness chemical equilibration in a quark-gluon plasma

Letessier

Rafelski

2007

Phys. Rev. C

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“…Unless specified, our fits do not include the ratios involving resonances (∆ ++ /p, K(892) * , and Λ * ). Obviously, the outcome of the fit (lower T ) for case i) is determined by two contributions: a) the 6% systematic error assigned by PHENIX to the ratiop/π − , which is much smaller than the values 14% and 18% which we calculate from the systematic errors of the absolute yields in case of BRAHMS and STAR data, respectively; b) the ratio φ/K − from PHENIX [80], which is much lower compared to the value from STAR [79]. Using all data from STAR (without resonances) and the d/p andd/p ratios from PHENIX gives T = 160.5 ± 2 MeV, µ b = 15 ± 7 MeV, with χ 2 /N df = 11.6/13 (from δ 2 minimization: T =166 MeV, µ b =22 MeV, δ 2 =0.17).…”

Section: Rhicmentioning

confidence: 98%

“…The yields of π ± , K ± , p, andp are published by PHENIX [76], STAR [77], and BRAHMS [78] and the values agree within the quoted systematic errors. In addition, available are the yields of φ [79,80], K(892) * [81], d andd [82]. We use the hadron ratios with the corresponding errors whenever provided by the experiments [76,79,80,81] or otherwise calculate the ratios using the published yields quoted above.…”

Section: Rhicmentioning

confidence: 99%

“…In addition, available are the yields of φ [79,80], K(892) * [81], d andd [82]. We use the hadron ratios with the corresponding errors whenever provided by the experiments [76,79,80,81] or otherwise calculate the ratios using the published yields quoted above. Further ratios are available as preliminary data on strange hyperon ratios [83], ∆ ++ /p [84],p/π − ,Λ/π − , Ξ/π − , Ω/π − , and Λ * /Λ [85].…”

Section: Rhicmentioning

confidence: 99%

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Hadron production in central nucleus–nucleus collisions at chemical freeze-out

2006

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We analyze the experimental hadron yield ratios for central nucleus-nucleus collisions in terms of thermal model calculations over a broad energy range, √ s N N =2.7-200 GeV. The fits of the experimental data with the model calculations provide the thermal parameters, temperature and baryo-chemical potential at chemical freezeout. We compare our results with the values obtained in other studies and also investigate more technical aspects such as a potential bias in the fits when fitting particle ratios or yields. Using parametrizations of the temperature and baryonic chemical potential as a function of energy, we compare the model calculations with data for a large variety of hadron yield ratios. We provide quantitative predictions for experiments at LHC energy, as well as for the low RHIC energy of 62.4 GeV. The relation of the determined parameters with the QCD phase boundary is discussed.

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“…Furthermore φ mesons could retain the information on the condition of the hot plasma at hadronization because φ mesons interact weakly in the hadronic matter [18]. The measurement of φ mesons has been of great interest in the study of collision dynamics and the properties of the dense matter created at RHIC [19,20,21].…”

Section: Introductionmentioning

confidence: 99%

Elliptic flow of ϕ mesons and strange quark collectivity

Chen

et al. 2006

Phys. Rev. C

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Based on A Multi-Phase Transport (AMPT) model, we have studied the elliptic flow v2 of φ mesons from reconstructed K + K − decay channel at the top Relativistic Heavy Ion Collider energy at Brookhaven National Laboratory. The dependences of v2 on transverse momentum pT and collision centrality are presented and the rescattering effect of φ mesons in the hadronic phase is also investigated. The results show that experimental measurement of v2 for φ mesons can retain the early collision information before φ decays and that the φ v2 value obeys the constituent quark number scaling which has been observed for other mesons and baryons. Our study indicates that the φ v2 mostly reflects partonic level collectivity developed during the early stage of the nucleusnucleus collision and the strange and light up/down quarks have developed similar angular anistropy properties at the hadronization.

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ϕ meson production in Au+Au and p+p collisions at

Cited by 173 publications

References 38 publications

Strangeness chemical equilibration in a quark-gluon plasma

Strangeness chemical equilibration in a quark-gluon plasma

Hadron production in central nucleus–nucleus collisions at chemical freeze-out

Elliptic flow of ϕ mesons and strange quark collectivity

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