Kaon distribution amplitude from lattice QCD and the flavor SU(3) symmetry
Journal
Nuclear Physics B
Journal Volume
939
Pages
429-446
Date Issued
2019
Author(s)
Abstract
We present the first lattice-QCD calculation of the kaon distribution amplitude using the large-momentum effective theory (LaMET) approach. The momentum-smearing technique has been implemented to improve signals at large meson momenta. We subtract the power divergence due to Wilson line to high precision using multiple lattice spacings. The kaon structure clearly shows an asymmetry of the distribution amplitude around x = 1/2, a clear sign of its skewness. Our result also prefers a broader distribution than the asymp-
Type
journal article