Han, Xue-Ying and Hua, Jun and Ji, Xiangdong and Lu, Cai-Dian and Schaefer, Andreas and Su, Yushan and Wang, Wei and Xu, Ji and Yang, Yibo and Zhang, Jian-Hui and Zhang, Qi-An and Zhao, Shuai and Lattice Parton Collaboration, (2025) Calculation of heavy meson light-cone distribution amplitudes from lattice QCD. PHYSICAL REVIEW D, 111 (3): 34503. ISSN 2470-0010, 2470-0029
Full text not available from this repository. (Request a copy)Abstract
We develop an approach for calculating heavy quark effective theory (HQET) light-cone distribution amplitudes (LCDAs) by employing a sequential effective theory methodology. The theoretical foundation of the framework is established, elucidating how the quasidistribution amplitudes (quasi-DAs) with three scales can be utilized to compute HQET LCDAs. We provide theoretical support for this approach by demonstrating the rationale behind devising a hierarchical ordering for the three involved scales, discussing the factorization at each step, clarifying the underlying reason for obtaining HQET LCDAs in the final phase, and addressing potential theoretical challenges. The lattice QCD simulation aspect is explored in detail, and the computations of quasi-DAs are presented. We employ three fitting strategies to handle contributions from excited states and extract the bare matrix elements. For renormalization purposes, we apply hybrid renormalization schemes at short and long distance separations. To mitigate long-distance perturbations, we perform an extrapolation in lambda 1/4 z <middle dot> Pz and assess the stability against various parameters. After two-step matching, our results for HQET LCDAs are found in agreement with existing model parametrizations. The potential phenomenological implications of the results are discussed, shedding light on how these findings could impact our understanding of the strong interaction dynamics and physics beyond the standard model. It should be noted, however, that systematic uncertainties have not been accounted for yet.
| Item Type: | Article |
|---|---|
| Uncontrolled Keywords: | FACTORIZATION; DECAYS; |
| Subjects: | 500 Science > 530 Physics |
| Divisions: | Physics > Institute of Theroretical Physics > Chair Professor Schäfer > Group Andreas Schäfer |
| Depositing User: | Dr. Gernot Deinzer |
| Date Deposited: | 25 Mar 2026 14:17 |
| Last Modified: | 25 Mar 2026 14:17 |
| URI: | https://pred.uni-regensburg.de/id/eprint/68007 |
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