Doubly heavy tetraquarks have emerged as new probes to study the heavy hadron spectrum. With the experimental observation of the JP=1+Tcc+, they pose a unique opportunity to bring together efforts in experiment, phenomenology, and lattice QCD. In lattice calculations they are accessible as ground states, unlike hidden flavor tetraquarks, and this enables accurate determinations of the scattering parameters alongside the binding energies of these tetraquarks. Today, lattice calculations firmly predict JP=1+Tbbud and Tbbus as QCD bound states, while recent studies approaching the JP=1+Tccud find it to be a virtual bound state at slightly non-physical input quark masses. Studies of the JP=1+Tbcud are ongoing and a new focus area. In light of these developments the evolution of this field until this point is reviewed. Emphasis is put on the methods in lattice spectroscopy that enable a robust evaluation of the lattice studies gathered. They are further reviewed towards their limitations and achievements. Current challenges and opportunities are discussed, including possibilities to approach the left-hand cut in the scattering analysis of the charm candidates and towards understanding the structure of those including two bottom quarks.

中文翻译：

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双重四夸克的晶格透视


双重重四夸克已成为研究重强子光谱的新探针。通过 JP=1+Tcc+ 的实验观察，他们提供了一个独特的机会，可以将实验、现象学和晶格 QCD 方面的努力结合起来。在晶格计算中，它们可以作为基态访问，这与隐藏的风味四夸克不同，这使得能够准确确定散射参数以及这些四夸克的结合能。今天，晶格计算坚定地预测 JP=1+Tbbud 和 Tbbus 是 QCD 束缚态，而最近接近 JP=1+Tccud 的研究发现，在略微非物理的输入夸克质量下，它是一个虚拟束缚态。JP=1+Tbcud 的研究正在进行中，并且是一个新的重点领域。鉴于这些发展，回顾了该领域到目前为止的演变。重点放在晶格光谱学中的方法上，这些方法可以对收集到的晶格研究进行稳健的评估。他们被进一步审查了他们的局限性和成就。讨论了当前的挑战和机遇，包括在魅力候选者的分散分析中接近左手切割的可能性，以及理解包括两个底夸克在内的结构的可能性。