The Impact of Quark Many-Body Effects on Exotic Hadrons

IF 1.7 4区物理与天体物理 Q2 PHYSICS, MULTIDISCIPLINARY Few-Body Systems Pub Date : 2024-05-26 DOI:10.1007/s00601-024-01932-2

Sachiko Takeuchi, Makoto Takizawa, Yasuhiro Yamaguchi, Atsushi Hosaka

引用次数: 0

Abstract

We investigate the exotic hadrons consisting of two light quarks and two heavy antiquarks, $(q\bar{Q})$-$(q\bar{Q})$. The spin-dependent term between quarks is known to give an attraction to the ud spin-0 component in the isospin-0 $u\bar{c} d\bar{c}$ system, $T_{cc}$. However, the said component also gets a repulsion from the partial Pauli-blocking. By the dynamical calculation with a simplified quark model, we discuss that the competition of the two effects leads to a shallow bound state for $T_{cc}$, which is preferred from the experiment, and a deep bound state for $T_{bb}$.

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夸克多体效应对外来中子的影响

我们研究了由两个轻夸克和两个重反夸克组成的奇异强子（（（q\bar{Q}）\）-（（（q\bar{Q}）\）。众所周知，夸克之间的自旋依赖项会吸引等自旋-0 $u\bar{c} d\bar{c}$ 系统中的ud自旋-0分量，即$T_{cc}$。然而，上述分量也会受到部分保利阻塞的排斥。通过一个简化夸克模型的动力学计算，我们讨论了这两种效应的竞争导致了实验中更倾向于的$T_{cc}$的浅束缚态和$T_{bb}$的深束缚态。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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来源期刊

Few-Body Systems 物理-物理：综合

CiteScore

2.90

自引率

18.80%

发文量

审稿时长

6-12 weeks

期刊介绍： The journal Few-Body Systems presents original research work – experimental, theoretical and computational – investigating the behavior of any classical or quantum system consisting of a small number of well-defined constituent structures. The focus is on the research methods, properties, and results characteristic of few-body systems. Examples of few-body systems range from few-quark states, light nuclear and hadronic systems; few-electron atomic systems and small molecules; and specific systems in condensed matter and surface physics (such as quantum dots and highly correlated trapped systems), up to and including large-scale celestial structures. Systems for which an equivalent one-body description is available or can be designed, and large systems for which specific many-body methods are needed are outside the scope of the journal. The journal is devoted to the publication of all aspects of few-body systems research and applications. While concentrating on few-body systems well-suited to rigorous solutions, the journal also encourages interdisciplinary contributions that foster common approaches and insights, introduce and benchmark the use of novel tools (e.g. machine learning) and develop relevant applications (e.g. few-body aspects in quantum technologies).

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