Summary of Topical Group on Hadron Spectroscopy (RF07) Rare Processes and Precision Frontier of Snowmass 2021
Summary of Topical Group on Hadron Spectroscopy (RF07) Rare Processes and Precision Frontier of Snowmass 2021
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2022-07
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通讯作者：
R. Lebed;T. Skwarnicki;L. An;S. Dobbs;B. Fulsom;F. Guo;M. Karliner;R. Mitchell;A. Pilloni;A. Pompili;S. Prelovsek;E. Santopinto;J. Stevens;A. Szczepaniak
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作者：
R. Lebed;T. Skwarnicki;L. An;S. Dobbs;B. Fulsom;F. Guo;M. Karliner;R. Mitchell;A. Pilloni;A. Pompili;S. Prelovsek;E. Santopinto;J. Stevens;A. Szczepaniak
强子光谱学是高能物理最初几十年的驱动力，在过去的20年里，由于发现了数十种新的、潜在的“奇异状态”(四夸克、五夸克、混合介子、胶球)，以及许多新的“常规”强子的观察，强子光谱学经历了兴趣的复兴。这些新的发现暴露了我们对强子状态的缺乏了解，除了最简单的夸克组态的几个低激发。即便如此，到目前为止，还没有单一的理论解释(如强子分子、阈值效应、双夸克化合物或其他)成功地容纳所有新的多夸克粒子，而从反应幅度数据中提取杂化粒子和胶球的信号仍有大量工作要做。本文件从实验和理论两个角度总结了该领域的现状。在实验方面，本报告概述了LHCb和其他大型强子对撞机实验、Belle II、BESIII和GlueX以及批准的电子离子对撞机、拟议的Super Tau-Charm工厂和其他未来实验的当前、计划和拟议的活动。理论部分简要概述了到目前为止所研究的多种唯象方法，反应幅度的严格研究进展，以及晶格QCD模拟的进展。
Hadron spectroscopy, the driving force of high-energy physics in its early decades, has experienced a renaissance in interest over the past 20 years due to the discovery of scores of new, potentially"exotic states"(tetraquarks, pentaquarks, hybrid mesons, glueballs), as well as the observation of many new"conventional"hadrons. The new discoveries expose our lack of understanding about hadronic states, beyond just a few low excitations of the simplest quark configurations. Even so, no single theoretical interpretation (such as hadron molecules, threshold effects, diquark compounds, or others) as yet successfully accommodates all of the new multiquark particles, while a great deal of work remains to extract signals of hybrids and glueballs from reaction-amplitude data. This document summarizes the current state of the field from both experimental and theoretical perspectives. On the experimental side, this report summarizes the current, planned, and proposed activities of LHCb and other LHC experiments, Belle II, BESIII, and GlueX, as well as the approved Electron-Ion Collider, the proposed Super Tau-Charm factory, and other future experiments. The theoretical portion provides a brief overview of multiple phenomenological approaches studied to date, progress in rigorous studies of reaction amplitudes, and advances in lattice-QCD simulations.