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.
@article{arxiv.2504.02453,
title = {Heavy meson lightcone distribution amplitudes from Lattice QCD},
author = {Xue-Ying Han and Jun Hua and Cai-Dian Lü and Andreas Schäfer and Yushan Su and Wei Wang and Ji Xu and Yibo Yang and Jian-Hui Zhang and Qi-An Zhang and Shuai Zhao},
journal= {arXiv preprint arXiv:2504.02453},
year = {2025}
}
Comments
Proceedings of the XVIth Quark Confinement and the Hadron Spectrum Conference (QCHSC24)