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arXiv 2106.02592hep-ph
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膨胀介质中多部分子介质诱导的级联

Multi-partonic medium induced cascades in expanding media

Souvik Priyam Adhya, Carlos A. Salgado, Martin Spousta, Konrad Tywoniuk

摘要:

超越简化的胶子级联,我们引入胶子和夸克自由度的介质内的部分子级联。然后,我们解决了一组耦合的演化方程数值分裂内核计算静态,指数,和Bjorken膨胀介质,以达到介质修改的部分子光谱夸克和胶子发起的射流。利用这些,我们计算了包含喷流$R_{AA}$,其中包括唯象驱动的夸克和胶子喷流分数的组合。然后,研究了喷流$R_{AA}$的快度依赖性。通过计算射流$v_2$,我们还研究了不同类型膨胀介质的射流淬灭的路径长度依赖性。此外,我们研究了从核修改的部分子分布函数,真空等离子体中的排放量的影响,以及淬火的开始时间的观测值的灵敏度。所有的计算结果与最近测量的数据进行了比较。

英文摘要:

Going beyond the simplified gluonic cascades, we introduce both gluon and quark degrees of freedom for partonic cascades inside the medium. We then solve the set of coupled evolution equations numerically with splitting kernels calculated for static, exponential, and Bjorken expanding media to arrive at medium-modified parton spectra for quark and gluon initiated jets. Using these, we calculate the inclusive jet $R_{AA}$ where the phenomenologically driven combinations of quark and gluon jet fractions are included. Then, the rapidity dependence of the jet $R_{AA}$ is examined. We also study the path-length dependence of jet quenching for different types of expanding media by calculating the jet $v_2$. Additionally, we study the sensitivity of observables on effects from nuclear modification of parton distribution functions, vacuum-like emissions in the plasma, and the time of the onset of the quenching. All calculations are compared with recently measured data.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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