Acceptance effect on the NtNp/Nd2 ratio of light nuclei coalescence yields as a probe of nucleon density fluctuations

被引：0

作者：

Gu, An ^{[1
,2
]}

Zhang, Michael X. ^{[3
]}

机构：

[1] Huzhou Univ, Huzhou 313000, Peoples R China

[2] Purdue Univ, W Lafayette, IN 47907 USA

[3] Livermore High Sch, Livermore, CA 94550 USA

来源：

NUCLEAR SCIENCE AND TECHNIQUES | 2025年 / 36卷 / 03期

基金：

中国国家自然科学基金;

关键词：

Heavy-ion collision; Critical point; Light nuclei coalescence; Nucleon density fluctuations; BEAM ENERGY SCAN; QUANTUM CHROMODYNAMICS; COLLISIONS; MODEL;

D O I：

10.1007/s41365-024-01608-w

中图分类号：

TL [原子能技术]; O571 [原子核物理学];

学科分类号：

0827 ; 082701 ;

摘要：

A coalescence model was employed to form deuterons (d), tritons (t), and helium-3 (3He\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$<^>3{\textrm{He}}$$\end{document}) nuclei from a uniformly-distributed volume of protons (p) and neutrons (n). We studied the ratio NtNp/Nd2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$N_\textrm{t}N_\textrm{p}/N_\textrm{d}<^>2$$\end{document} of light nuclei yields as a function of the neutron density fluctuations. We investigated the effect of finite transverse momentum (pT\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$p_{\textrm{T}}$$\end{document}) acceptance on the ratio, in particular, the "extrapolation factor" (f) for the ratio as a function of the pT\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$p_{\textrm{T}}$$\end{document} spectral shape and the magnitude of neutron density fluctuations. The nature of f was found to be monotonic in pT\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$p_{\textrm{T}}$$\end{document} spectra "temperature" parameter and neutron density fluctuation magnitude; variations in the latter are relatively small. We also examined f in realistic simulations using the kinematic distributions of protons measured from the heavy-ion collision data. The nature of f was found to be smooth and monotonic as a function of the beam energy. Therefore, we conclude that extrapolation from limited pT\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$p_{\textrm{T}}$$\end{document} ranges does not create, enhance, or reduce the local peak of the NtNp/Nd2\documentclass[12pt]{minimal} \usepackage{amsmath} \usepackage{wasysym} \usepackage{amsfonts} \usepackage{amssymb} \usepackage{amsbsy} \usepackage{mathrsfs} \usepackage{upgreek} \setlength{\oddsidemargin}{-69pt} \begin{document}$$N_\textrm{t}N_\textrm{p}/N_\textrm{d}<^>2$$\end{document} ratio in the beam energy. Our study provides a necessary benchmark for light nuclei ratios as a probe for nucleon density fluctuations, an important observation in the search for the critical point of nuclear matter.

引用

页数：10

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