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arXiv 2609.17765nucl-exhep-exnucl-th

通过各向异性-响应标度约束 $f_0(980)$ 的结构与形成动力学

Constraining the $f_0(980)$ Structure and Formation Dynamics via Anisotropy-Response Scaling

Roy A. Lacey

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中文总结 AI 辅助

通过各向异性-响应标度框架分析高多重数 p+Pb 碰撞数据,发现 $f_0(980)$ 呈现类单介子响应且末态敏感性弱,与分子态基准明显不同,确立了该标度作为研究其形成动力学的新实验探针。

中文摘要 AI 辅助

采用一种按粒子种类分辨的各向异性-响应标度框架,研究相对论性核碰撞中 $f_0(980)$ 的结构与形成动力学。在高多重数 p+Pb 碰撞($\sqrt{s_{NN}}=8.16$~TeV)中已发表的测量结果,在单介子响应构造下表现出广泛的标度闭合,其有效末态响应较小,$\zeta_{f_0}\simeq0.04$;而对称的 ${\rm K\bar K}$ 组分响应构造则给出明显较差的闭合性。一个显式的分子态 ${\rm K\bar K}$ 计算也表现出类似单介子的标度,但给出的有效末态响应明显更大,$\zeta_{f_0}\simeq0.16$。因此,单介子标度本身并非唯一的结构判别量。综合响应构造与 $\zeta_{f_0}$ 约束,所测得的 $f_0(980)$ 表现为具有弱末态敏感性的类单介子各向异性响应,与分子基准明显不同。这些结果确立了各向异性-响应标度作为研究 $f_0(980)$ 形成动力学的一种新实验探针,并推动在不同碰撞系统和束流能量下开展系统性检验。

英文摘要

A species-resolved anisotropy-response scaling framework is used to investigate the structure and formation dynamics of the $f_0(980)$ in relativistic nuclear collisions. Published measurements in high-multiplicity p+Pb collisions at $\sqrt{s_{NN}}=8.16$~TeV exhibit broad scaling closure under a single-meson response construction, with a small effective final-state response, $ζ_{f_0}\simeq0.04$, whereas a symmetric ${\rm K\bar K}$ constituent-response construction gives substantially poorer closure. An explicitly molecular ${\rm K\bar K}$ calculation also exhibits single-meson-like scaling but gives a substantially larger effective final-state response, $ζ_{f_0}\simeq0.16$. Thus, single-meson scaling alone is not a unique structural discriminator. The combined response construction and $ζ_{f_0}$ constraints characterize the measured $f_0(980)$ by a single-meson-like anisotropy response with weak final-state sensitivity, distinctly different from the molecular benchmark. These results establish anisotropy-response scaling as a new experimental probe of $f_0(980)$ formation dynamics and motivate systematic tests across collision systems and beam energies.

发表机构

  • the State University of New York, Stony Brook(纽约州立大学石溪分校)
  • Stony Brook University(石溪大学)

机构由 AI 辅助整理,请以论文原文为准。

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