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Extracting the temperature dependence in high-p⊥particle energy loss
Physical Review C ( IF 3.1 ) Pub Date : 2021-02-16 , DOI: 10.1103/physrevc.103.024908
Stefan Stojku , Bojana Ilic , Marko Djordjevic , Magdalena Djordjevic

The suppression of high-p particles is one of the main signatures of parton energy loss during its passing through the quark-gluon plasma medium, and is reasonably reproduced by different theoretical models. However, a decisive test of the reliability of a certain energy-loss mechanism, apart from its path length, is its temperature dependence. Despite its importance and comprehensive dedicated studies, this issue is still awaiting more stringent constraints. To this end, we here propose a novel observable to extract the temperature-dependence exponent of a high-p particle's energy loss, based on RAA. More importantly, by combining analytical arguments, full-fledged numerical calculations, and comparison with experimental data, we argue that this observable is highly suited for testing the long-standing ΔE/EL2T3 paradigm. The anticipated significant reduction of experimental errors will allow direct extraction of temperature dependence, by considering different centrality pairs in A+A collisions (irrespective of the nucleus size) in the high-p region. Overall, our results imply that this observable, which reflects the underlying energy-loss mechanism, is very important to distinguish between different theoretical models.

中文翻译:

提取高粒子能量损失中的温度依赖性

压制高p粒子是parton穿过夸克-胶子等离子体介质时能量损失的主要特征之一,并且可以通过不同的理论模型合理地再现。但是,除了路径长度以外,对某种能量损耗机制的可靠性的决定性测试是其温度依赖性。尽管它的重要性和全面的专门研究,但这个问题仍在等待更严格的限制。为此,我们在这里提出了一种新颖的可观察的方法,可以提取出高能级的温度依赖性指数。p 粒子的能量损失,基于 [R一种一种。更重要的是,通过结合分析论点,全面的数值计算以及与实验数据的比较,我们认为该可观测值非常适合测试长期的ΔË/Ë大号2Ť3范例。通过考虑不同的中心点对,预期的实验误差的显着降低将允许直接提取温度依赖性。一种+一种 高位碰撞(无论核大小如何)p地区。总的来说,我们的结果表明,这个可观察到的现象反映了潜在的能量损失机制,对于区分不同的理论模型非常重要。
更新日期:2021-02-16
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