arXiv 1306.27392013-06-12hep-ph

射流淬熄能量在体相介质中沉积的时空结构

The space-time structure of the energy deposition into the bulk medium due to jet quenching

Thorsten Renk

备注：: 8 pages, 7 figures
发表信息：: Phys. Rev. C 88, 044905 (2013)
DOI：: 10.1103/PhysRevC.88.044905

摘要：

虽然超相对论性重离子碰撞中的喷流猝灭被确定为硬微扰和软流体动力学量子色动力学之间相互作用（或等价地硬探针和大块QCD物质之间的相互作用）的结果，但关于大块物质对喷流通过的反应的确定性知之甚少。一般来说，射流在穿过介质时相互作用代表了大量物质流体的能量和动量来源。如果已知这种源项的精确形式，则可以使用流体动力学来计算介质的反应。由于RHIC和LHC的大量数据，对硬探针的理解取得了新的进展，通过确定远离硬模式的能量流，可以更好地约束源项。这项工作的目的是讨论什么可以从这样的约束的上下文中的介质淋浴演化代码YaJEM-DE，并说明在能量沉积的波动的作用。

英文摘要：

While jet quenching in ultrarelativistic heavy-ion collisions is firmly established as a phenomenon resulting from the interplay between hard perturbative and soft fluid-dynamical Quantum Chromodynamics (or equivalently the interaction between hard probes and bulk QCD matter), less is known with certainty about the reaction of bulk matter to the passage of a jet. On general grounds, a jet interacting while passing through a medium represents a source of energy and momentum for the bulk matter fluid. If the precise form of such a source term is known, the reaction of the medium can be computed using fluid dynamics. Recent advances in the understanding of hard probes due to the wealth of data from RHIC and LHC allow to constrain the source term better by determining the energy flow away from hard modes. The aim of this work is to discuss what can be learned from such constraints in the context of the in-medium shower evolution code YaJEM-DE and to illustrate the role of fluctuations in the energy deposition.

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