Physical Review D
We propose the approach for a lattice investigation of light cone distribution amplitudes (LCDA) of heavy-light mesons, such as the B meson, using the formalism of parton pseudodistributions. A basic ingredient of the approach is the study of short-distance behavior of the B-meson Ioffe-time distribution amplitude (ITDA), which is a generalization of the B-meson LCDA in coordinate space. We construct a reduced ITDA for the B meson, and derive the matching relation between the reduced ITDA and the LCDA. The reduced ITDA is ultraviolet finite, which guarantees that the continuum limit exists on the lattice.
Original Publication Citation
Shuai, Z. & Radyushkin, A.V. (2021). B-meson Ioffe-Time distribution amplitude at short distances. Physical Review D, 103(5) 1-7, Article 054022. https://doi.org/10.1103/PhysRevD.103.054022
Zhao, Shuai and Radyushkin, Anatoly V., "B-Meson Ioffe-Time Distribution Amplitude at Short Distances" (2021). Physics Faculty Publications. 522.