László Gyulai, Gábor Bíró, Róbert Vértesi, Gergely Gábor Barnaföldi
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引用次数: 0
摘要
我们利用开放粲子的产生来估算在高能强子-强子对撞中我们能看到多远的时间。我们分析了在 ALICE 和 STAR 实验中从 pp、p-Pb 和 A-A 对撞中发现的 D 介子的横动量分布,其能量范围从 sNN=200GeV 到 7 TeV。在非广延性统计框架内,D介子的普通Tsallis参数比轻味强子代表了更高的温度和更多的自由度。假设Bjorken膨胀,D介子的产生对应于一个明显更早的适当时间,τD = (0.18 ± 0.06)τLF 。
How far can we see back in time in high-energy collisions using charm hadrons?
We use open charm production to estimate how far we can see back in time in high-energy hadron-hadron collisions. We analyze the transverse momentum distributions of the identified D mesons from pp, p–Pb and A–A collisions at the ALICE and STAR experiments covering the energy range from sNN=200GeV up to 7 TeV. Within a non-extensive statistical framework, the common Tsallis parameters for D mesons represent higher temperature and more degrees of freedom than that of light-flavour hadrons. Assuming Bjorken-expansion, the production of D mesons corresponds to a significantly earlier proper time, τD = (0.18 ± 0.06)τLF.
期刊介绍:
Journal of Physics G: Nuclear and Particle Physics (JPhysG) publishes articles on theoretical and experimental topics in all areas of nuclear and particle physics, including nuclear and particle astrophysics. The journal welcomes submissions from any interface area between these fields.
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