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arXiv 2504.02453hep-lathep-exhep-ph
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来自格点QCD的重介子光锥分布振幅

Heavy meson lightcone distribution amplitudes from Lattice QCD

Xue-Ying Han, Jun Hua, Cai-Dian Lü, Andreas Schäfer, Yushan Su, Wei Wang, Ji Xu, Yibo Yang, Jian-Hui Zhang, Qi-An Zhang, Shuai Zhao

AI总结:

针对重夸克有效理论中光锥分布振幅第一性原理确定的理论挑战,本文提出一种连续使用有效场论的实用方法,利用新生成的格点系综进行了开创性的格点计算,为重介子LCDAs提供了新见解,并讨论了其对重到轻跃迁形状因子的影响。

摘要:

重夸克有效理论(HQET)框架内的光锥分布振幅(LCDAs)在重底介子弱衰变的理论描述中起着至关重要的作用。然而,HQET LCDAs的第一性原理确定面临着重大的理论挑战。在本报告中,我们介绍了一种克服这些障碍的实用方法。该方法连续使用了有效场论。利用新生成的格点系综,我们提出了一项开创性的格点计算,为重介子的LCDAs提供了新见解。此外,我们讨论了这些结果对重到轻跃迁形状因子的影响,并简要给出了该领域未来的潜在方向。

英文摘要:

Lightcone distribution amplitudes (LCDAs) within the framework of heavy quark effective theory (HQET) play a crucial role in the theoretical description of weak decays of heavy bottom mesons. However, the first-principle determination of HQET LCDAs faces significant theoretical challenges. In this presentation, we introduce a practical approach to address these obstacles. This makes sequential use of effective field theories. Leveraging the newly-generated lattice ensembles, we present a pioneering lattice calculation, offering new insights into LCDAs for heavy mesons. Additionally, we discuss the impact of these results on the heavy-to-light form factors and briefly give potential future directions in this field.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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