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Title B-meson light-cone distribution amplitude from lattice QCD
Authors Wei Wang,Yu-Ming Wang,Ji Xu,Shuai Zhao
JLAB number JLAB-THY-19-3025
LANL number arXiv:1908.09933
Other number DOE/OR/23177-4842
Document Type(s) (Journal Article) 
Supported by U.S. Naval Research: No
Supported by Jefferson Lab LDRD Funding: No
Funding Source: Nuclear Physics (NP)
Other Funding:National Natural Science Foundation of China

Compiled for arXiv
Publication Abstract: A new method for the model-independent determination of the light-cone distribution amplitude (LCDA) of the B-meson in heavy quark effective theory (HQET) is proposed by combining the large momentum effective theory (LaMET) and the lattice QCD simulation technique. We demonstrate the autonomous scale dependence of the non-local quasi HQET operator with the aid of the auxiliary field approach, and further determine the perturbative matching coefficient entering the hard-collinear factorization formula for the B-meson quasi distribution amplitude at the one-loop accuracy. These results will be crucial to explore the partonic structure of heavy-quark hadrons in the static limit and to improve the theory description of exclusive B-meson decay amplitudes based upon perturbative QCD factorization theorems.
Experiment Numbers: other
Document: pdf
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