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| Format: | Preprint |
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2022
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| Accès en ligne: | https://arxiv.org/abs/2207.13534 |
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| _version_ | 1866913317396676608 |
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| author | Yang, Zhidong Chen, Lie-Wen |
| author_facet | Yang, Zhidong Chen, Lie-Wen |
| contents | Due to their weak final state interactions, the $ϕ$ meson and $Ω$ baryon provide unique probes of the properties of the quark-gluon plasma (QGP) formed in relativistic heavy-ion collisions. Using the quark recombination model with the quark phase-space information parameterized in a viscous blastwave, we study the transverse-momentum spectra and elliptic flows of $ϕ$ and $Ω$ in Au+Au collisions at $\sqrt{s_{\rm NN}} = 200$ GeV and Pb+Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ TeV. The viscous blastwave includes non-equilibrium deformations of thermal distributions due to shear and bulk stresses and thus carries information on the specific shear viscosity $η/s$ and the specific bulk viscosity $ζ/s$ of the QGP. We perform a model-to-data comparison with Bayesian inference and simultaneously obtain $η/s=(2.08^{+1.10}_{-1.09})/4π$ and $ζ/s= 0.06^{+0.04}_{-0.04}$ at $90\%$ C.L. for the baryon-free QGP at crossover temperature of about $160$ MeV. Our work provides a novel approach to simultaneously determine the $η/s$ and $ζ/s$ of the QGP at hadronization. |
| format | Preprint |
| id |
arxiv_https___arxiv_org_abs_2207_13534 |
| institution | arXiv |
| publishDate | 2022 |
| record_format | arxiv |
| spellingShingle | Bayesian Inference of the Specific Shear and Bulk Viscosities of the Quark-Gluon Plasma at Crossover from $ϕ$ and $Ω$ Observables Yang, Zhidong Chen, Lie-Wen Nuclear Theory High Energy Physics - Phenomenology Nuclear Experiment Due to their weak final state interactions, the $ϕ$ meson and $Ω$ baryon provide unique probes of the properties of the quark-gluon plasma (QGP) formed in relativistic heavy-ion collisions. Using the quark recombination model with the quark phase-space information parameterized in a viscous blastwave, we study the transverse-momentum spectra and elliptic flows of $ϕ$ and $Ω$ in Au+Au collisions at $\sqrt{s_{\rm NN}} = 200$ GeV and Pb+Pb collisions at $\sqrt{s_{\rm NN}} = 2.76$ TeV. The viscous blastwave includes non-equilibrium deformations of thermal distributions due to shear and bulk stresses and thus carries information on the specific shear viscosity $η/s$ and the specific bulk viscosity $ζ/s$ of the QGP. We perform a model-to-data comparison with Bayesian inference and simultaneously obtain $η/s=(2.08^{+1.10}_{-1.09})/4π$ and $ζ/s= 0.06^{+0.04}_{-0.04}$ at $90\%$ C.L. for the baryon-free QGP at crossover temperature of about $160$ MeV. Our work provides a novel approach to simultaneously determine the $η/s$ and $ζ/s$ of the QGP at hadronization. |
| title | Bayesian Inference of the Specific Shear and Bulk Viscosities of the Quark-Gluon Plasma at Crossover from $ϕ$ and $Ω$ Observables |
| topic | Nuclear Theory High Energy Physics - Phenomenology Nuclear Experiment |
| url | https://arxiv.org/abs/2207.13534 |