重离子碰撞中重子和电荷停止的相关性* * 部分受中国科学院战略优先研究计划(XDB34030000)和国家重点研发计划(2022YFA1604900)、美国能源部科学办公室365合同(DE-SC0012704、DE-FG02-10ER41666、DE-AC02-98CH10886)资助

IF 3.6 2区 物理与天体物理 Q1 PHYSICS, NUCLEAR
Wendi Lv, Yang Li, Ziyang Li, Rongrong Ma, Zebo Tang, Prithwish Tribedy, Chun Yuen Tsang, Zhangbu Xu, Wangmei Zha
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引用次数: 0

摘要

在重子结构的标准 QCD 图景中,理论上重子数由价夸克携带。另一种理论在 20 世纪 70 年代提出了另一种重子数载体,即胶子场的非微扰 Y 形构型,称为重子交界处。然而,这两种理论都没有得到实验验证。最近,有人建议通过研究重离子碰撞中速时净电荷和净重子产率的相关性来寻找重子交界处。本文介绍了利用 UrQMD 蒙特卡洛模型对从氧到铀的各种重离子碰撞中的这种相关性进行的研究。UrQMD 模型把价夸克输运作为电荷和重子在中速停止的主要手段。我们还对等边 + 和 + 碰撞进行了详细研究。我们发现了电荷停滞相对于重子停滞的普遍趋势,并发现电荷停滞总是大于重子停滞。这项研究提供了价夸克输运的模型基线,以了解在相对论重离子对撞的中等速率下净电荷和净重子产率的预期。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Correlations of baryon and charge stopping in heavy ion collisions* * Supported in part by the Strategic Priority Research Program of the Chinese Academy of Sciences (XDB34030000) and the National Key Research and Development Program of China (2022YFA1604900), the U.S. DOE Office of Science365 under contract (DE-SC0012704, DE-FG02-10ER41666, DE-AC02-98CH10886)
Baryon numbers are theorized to be carried by valence quarks in the standard QCD picture of the baryon structure. Another theory proposed an alternative baryon number carrier, a non-perturbative Y-shaped configuration of the gluon field, called the baryon junction in the 1970s. However, neither of these theories has been verified experimentally. Recently, searching for the baryon junction by investigating the correlation of net-charge and net-baryon yields at midrapidity in heavy-ion collisions has been suggested. This paper presents studies of such correlations in collisions of various heavy ions from oxygen to uranium with the UrQMD Monte Carlo model. The UrQMD model implements valence quark transport as the primary means of charge and baryon stopping at midrapidity. Detailed studies are also conducted for isobaric + and + collisions. We found a universal trend of charge stopping with respect to baryon stopping and discovered that the charge stopping is always greater than the baryon stopping. This study provides a model baseline in valence quark transport for what is expected in net-charge and net-baryon yields at the midrapidity of relativistic heavy-ion collisions.
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来源期刊
中国物理C
中国物理C 物理-物理:核物理
CiteScore
6.50
自引率
8.30%
发文量
8976
审稿时长
1.3 months
期刊介绍: Chinese Physics C covers the latest developments and achievements in the theory, experiment and applications of: Particle physics; Nuclear physics; Particle and nuclear astrophysics; Cosmology; Accelerator physics. The journal publishes original research papers, letters and reviews. The Letters section covers short reports on the latest important scientific results, published as quickly as possible. Such breakthrough research articles are a high priority for publication. The Editorial Board is composed of about fifty distinguished physicists, who are responsible for the review of submitted papers and who ensure the scientific quality of the journal. The journal has been awarded the Chinese Academy of Sciences ‘Excellent Journal’ award multiple times, and is recognized as one of China''s top one hundred key scientific periodicals by the General Administration of News and Publications.
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