Speaker
Mr
Rui Zhang
(Institute of Theoretical Physics, Chinese Academy of Sciences)
Description
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. We also study the leading SU(3) flavor symmetry breaking relations for the pion, kaon and eta meson distribution amplitudes, and the results are consistent with the prediction from chiral perturbation theory.
Primary author
Mr
Rui Zhang
(Institute of Theoretical Physics, Chinese Academy of Sciences)
Co-authors
Prof.
Andreas Schäfer
(Universität Regensburg)
Prof.
Huey-Wen Lin
(MSU)
Dr
Jianhui Zhang
(University of Regensburg)
Prof.
Jiunn-Wei Chen
(National Taiwan University)
Prof.
Luchang Jin
(University of Connecticut)
Dr
Peng Sun
(MSU)
Dr
Yi-bo Yang
(Michigan state university)
Dr
Yong Zhao
(Massachusetts Institute of Technology)