beat365官方网站學術論壇（第五十二講）

Nonrelativistic multiscale systems with Effective Field Theories

利用有效場論研究非相對論多尺度系統

Nonrelativistic bound states lie at the core of quantum physics, permeating the fabric of nature across diverse realms, spanning particle to nuclear physics, and from condensed matter to astrophysics. These systems are pivotal in addressing contemporary challenges at the forefront of particle physics. Characterized by distinct energy scales, they serve as unique probes of complex environments. Historically, their incorporation into quantum field theory was fraught with difficulty until the emergence of nonrelativistic effective field theories (NREFTs).

In this colloquium, we delve into the construction of a potential NREFT (pNREFT), a framework that directly tackles bound state dynamics reimagining quantum mechanics from field theory. Focusing on heavy quarkonia, pNRQCD facilitates systematic definitions and precise calculations for high-energy collider observables.

At the cutting edge, we investigate nonrelativistic bound states in intricate environments, like the newly discovered exotics X, Y, Z above the strong decay threshold and the behavior in out-of-equilibrium scenarios, such as quarkonium suppression in a Quark Gluon Plasma or dark matter interactions in the early universe. Our ability to achieve precision calculations and control strongly interacting systems is closely linked to bridging perturbative methods with nonperturbative tools, notably numerical lattice gauge theories.

報告人簡介：

Nora Brambilla是粒子物理與核物理領域國際頂級專家學者。她的研究興趣在于理論粒子與核物理；強相互作用物質；用于标準模型的有效場論、有限溫度量子色動力學、誇克膠子等離子體、非平衡态物理學、格點量子色動力學以及非微擾技術。她的成名作是提出了pNREFT（勢非相對論有效場論）理論，建立了用量子場論系統精确描述量子力學問題的橋梁。

2023 年獲得歐洲研究理事會高級資助項目，項目名稱為 “EFT-XYZ：利用有效場論理解并預測 XYZ 奇異強子的性質”。2012 年當選為美國物理學會會士，表彰其在重誇克-反誇克系統理論方面的貢獻，包括新有效場論的發展，以及通過創立并領導誇克偶素工作組對誇克偶素物理學領域所做出的貢獻。她創立了國際誇克偶素工作組（QWG，2002 年成立）和誇克禁閉系列會議（1994開始）。

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beat365官方网站學術論壇創辦于2020年9月，邀請國内外高校和研究機構高層次科技創新領軍學者就物理學及相關領域的基礎前沿探索、關鍵技術突破和熱點問題等做學術演講，旨在推進高質量學術交流，促進學科交叉融合和開拓新興特色方向研究，培養具有科學精神、全球視野、創新能力、批判性思維的優秀青年人才。

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聯系人：

談承泰 2301110106@stu.pku.edu.cn