Jet transport coefficient q^ in lattice QCD
Jet transport coefficient q^ in lattice QCD
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DOI：
10.1103/physrevd.106.034505
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发表时间：
2022-08
影响因子：
5
通讯作者：
Amit Kumar;A. Majumder;J. Weber
中科院分区：
文献类型：
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作者：
Amit Kumar;A. Majumder;J. Weber
本文首次计算了4D欧氏格点上猝灭和味QCD的喷注输运系数。高能部分子的类光传播是从横向于传播方向的动量的均方增益中分解出来的，这是用热场强度场强度相关器表示的。在格点上计算了其算符乘积展开式中的首扭项。连续外推淬火的结果，和完整的QCD估计的基础上非重整化晶格数据，在多个晶格尺寸，（非）微扰计算和唯象提取的比较。晶格数据显示出类似于熵密度的温度依赖性。在不确定性，这些是一致的唯象提取，相反，使用微扰理论的计算。
We present the first calculation of the jet transport coefficientin quenched and ()-flavor QCD on a 4D Euclidean lattice. The lightlike propagation of an energetic parton is factorized from the mean square gain in momentum transverse to the direction of propagation, which is expressed in terms of the thermal field-strength field-strength correlator. The leading-twist term in its operator product expansion is calculated on the lattice. Continuum extrapolated quenched results, and full QCD estimates based on unrenormalized lattice data, over multiple lattice sizes, are compared with (non)perturbative calculations and phenomenological extractions of. The lattice data forshow a temperature dependence similar to the entropy density. Within uncertainties, these are consistent with phenomenological extractions, contrary to calculations using perturbation theory.