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作者施舒哲,廖劲峰（2019）在《Global constraints from RHIC and LHC on transport properties of QCD fluids in CUJET/CIBJET framework》一文中研究指出：We report results of a comprehensive global х2 analysis of nuclear collision data from RHIC（0.2 ATeV）,LHC1（2.76 ATeV）, and recent LHC2（5.02 ATeV） energies using the updated CUJET framework. The framework consistently combines viscous hydrodynamic fields predicted by VISHNU2+1（validated with soft pT﹤2 GeV bulk observables） and the DGLV theory of jet elastic and inelastic energy loss generalized to QGP fluids with an sQGMP color structure, including effective semi-QGP color electric quark and gluon as well as emergent color magnetic monopole degrees of freedom constrained by lattice QCD data. We vary the two control parameters of the model（the maximum value of the running QCD coupling, c, and the ratio cm of color magnetic to electric screening scales） and calculate the global х2（αc,cm） compared with available jet fragment observables( RAA,v2). A global х2 minimum is found with αc≈0.9±0.1 and cm≈0.25±0.03. Using CIBJET, the event-by-event（ebe） generalization of the CUJET framework, we show that ebe fluctuations in the initial conditions do not significantly alter our conclusions（except for v3）. An important theoretical advantage of the CUJET and CIBJET frameworks is not only its global х2 consistency with jet fragment observables at RHIC and LHC and with non-perturbative lattice QCD data, but also its internal consistency of the constrained jet transport coefficient, ■（E,T）/T3, with the near-perfect fluid viscosity to entropy ratio（η/s～T3/■～0.1-0.2） property of QCD fluids near Tc needed to account for the low pT﹤2 GeV flow observables. Predictions for future tests at LHC with 5.44 ATeV Xe + Xe and 5.02 ATeV Pb + Pb are also presented.
Abstract
We report results of a comprehensive global х2 analysis of nuclear collision data from RHIC（0.2 ATeV）,LHC1（2.76 ATeV）, and recent LHC2（5.02 ATeV） energies using the updated CUJET framework. The framework consistently combines viscous hydrodynamic fields predicted by VISHNU2+1（validated with soft pT﹤2 GeV bulk observables） and the DGLV theory of jet elastic and inelastic energy loss generalized to QGP fluids with an sQGMP color structure, including effective semi-QGP color electric quark and gluon as well as emergent color magnetic monopole degrees of freedom constrained by lattice QCD data. We vary the two control parameters of the model（the maximum value of the running QCD coupling, c, and the ratio cm of color magnetic to electric screening scales） and calculate the global х2（αc,cm） compared with available jet fragment observables( RAA,v2). A global х2 minimum is found with αc≈0.9±0.1 and cm≈0.25±0.03. Using CIBJET, the event-by-event（ebe） generalization of the CUJET framework, we show that ebe fluctuations in the initial conditions do not significantly alter our conclusions（except for v3）. An important theoretical advantage of the CUJET and CIBJET frameworks is not only its global х2 consistency with jet fragment observables at RHIC and LHC and with non-perturbative lattice QCD data, but also its internal consistency of the constrained jet transport coefficient, ■（E,T）/T3, with the near-perfect fluid viscosity to entropy ratio（η/s～T3/■～0.1-0.2） property of QCD fluids near Tc needed to account for the low pT﹤2 GeV flow observables. Predictions for future tests at LHC with 5.44 ATeV Xe + Xe and 5.02 ATeV Pb + Pb are also presented.
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论文作者分别是来自Chinese Physics C的施舒哲,廖劲峰，发表于刊物Chinese Physics C2019年04期论文，是一篇关于,Chinese Physics C2019年04期论文的文章。本文可供学术参考使用，各位学者可以免费参考阅读下载，文章观点不代表本站观点，资料来自Chinese Physics C2019年04期论文网站，若本站收录的文献无意侵犯了您的著作版权，请联系我们删除。