D(s) meson as a quantitative probe of diffusion and hadronization in nuclear collisions.
D(s) meson as a quantitative probe of diffusion and hadronization in nuclear collisions.
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DOI：
10.1103/physrevlett.110.112301
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发表时间：
2012-04
影响因子：
8.6
通讯作者：
M. He;R. Fries;R. Rapp
中科院分区：
文献类型：
--
作者：
M. He;R. Fries;R. Rapp
超相对论重离子碰撞中D（s）介子谱的修正被认为是热核介质关键性质的定量探针。D（s）=cs夸克的独特价夸克含量将著名的奇异性增强与原始产生的魅夸克的集体流模式结合起来。这个想法是说明利用一致的强耦合处理与流体动力学整体演化和非微扰的T矩阵相互作用的重夸克扩散和强子化的夸克胶子等离子体（QGP）。在相对论重离子对撞机上，D（s）核修正因子有较大的提高，在横动量约为2GeV/c时最大可达1.5-1.8。这是重夸克与QGP强耦合以及它们通过与奇夸克合并而强子化的直接结果。我们还介绍了在强子相扩散的影响，并建议增加的D介子椭圆流相比，D（s）可以解开强子和QGP液体的输运性质。
The modifications of D(s)-meson spectra in ultrarelativistic heavy-ion collisions are identified as a quantitative probe of key properties of the hot nuclear medium. The unique valence-quark content of the D(s)=cs̄ couples the well-known strangeness enhancement with the collective-flow pattern of primordially produced charm quarks. This idea is illustrated utilizing a consistent strong-coupling treatment with hydrodynamic bulk evolution and nonperturbative T-matrix interactions for both heavy-quark diffusion and hadronization in the quark-gluon plasma (QGP). A large enhancement of the D(s) nuclear modification factor at Relativistic Heavy Ion Collider is predicted, with a maximum of ∼1.5-1.8 at transverse momenta around 2 GeV/c. This is a direct consequence of the strong coupling of the heavy quarks to the QGP and their hadronization via coalescence with strange quarks. We furthermore introduce the effects of diffusion in the hadronic phase and suggest that an increase of the D-meson elliptic flow compared to the D(s) can disentangle the transport properties of hadronic and QGP liquids.