How far can we see back in time in high-energy collisions using charm hadrons?

IF 3.4 3区物理与天体物理 Q2 PHYSICS, NUCLEAR Journal of Physics G: Nuclear and Particle Physics Pub Date : 2024-07-08 DOI:10.1088/1361-6471/ad59b9

László Gyulai, Gábor Bíró, Róbert Vértesi, Gergely Gábor Barnaföldi

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Abstract

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, τ _D = (0.18 ± 0.06)τ _LF.

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在使用粲强子的高能对撞中，我们能看到多远的过去？

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 。

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来源期刊

Journal of Physics G: Nuclear and Particle Physics 物理-物理：核物理

CiteScore

7.60

自引率

5.70%

发文量

105

审稿时长

1 months

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. All aspects of fundamental nuclear physics research, including: nuclear forces and few-body systems; nuclear structure and nuclear reactions; rare decays and fundamental symmetries; hadronic physics, lattice QCD; heavy-ion physics; hot and dense matter, QCD phase diagram. All aspects of elementary particle physics research, including: high-energy particle physics; neutrino physics; phenomenology and theory; beyond standard model physics; electroweak interactions; fundamental symmetries. All aspects of nuclear and particle astrophysics including: nuclear physics of stars and stellar explosions; nucleosynthesis; nuclear equation of state; astrophysical neutrino physics; cosmic rays; dark matter. JPhysG publishes a variety of article types for the community. As well as high-quality research papers, this includes our prestigious topical review series, focus issues, and the rapid publication of letters.