Work

Power corrections in the determination of heavy meson light-cone distribution amplitudes: A renormalon-based estimation

Year: 2025

Type: article

Abstract: At leading power accuracy, the QCD light-cone distribution amplitudes (LCDAs) for a heavy meson can be matched onto the LCDAs in the framework of heavy-quark effective theory (HQET) through a factorization formula. We examine the power corrections to this factorization in the renormalon model, which can associate the power corrections originating from high-twist contributions to the divergent series in a matching kernel. Our analysis indicates that the dominant power corrections originate from the virtual part of the vertex bubble chain diagrams, which generate poles at w = n + 1 2 , ∀ n ∈ N and w = 1 in the Borel plane. Employing phenomenological models for both HQET and QCD LCDA, we present a numerical estimate. The results indicate that the power corrections in the peak region are approximately 22% for the D meson and 7% for the B ¯ meson. These findings showcase the magnitude and potential importance of power corrections in achieving high-precision phenomenological predictions for heavy mesons.

Source: Physical review. D/Physical review. D.

DOI: 10.1103/c97x-z7j9

Authors: Tu Guo, Chao Han, Wei Wang, Jia-Lu Zhang

Institution: Shanghai Jiao Tong University

Language: English

Topic: Quantum Chromodynamics and Particle Interactions

Subfield: Nuclear and High Energy Physics

Field: Physics and Astronomy

Domain: Physical Sciences

Open Access status: hybrid

Funder: National Natural Science Foundation of China

Awards: G5687198492, G7504224031