arXiv:2504.02453·v1·High Energy Physics — Lattice
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
Abstract
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.
Comments: Proceedings of the XVIth Quark Confinement and the Hadron Spectrum Conference (QCHSC24)