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Title: Kaon distribution amplitude from lattice QCD and the flavor SU(3) symmetry

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 asymptotic form. 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.

Authors:
; ; ; ; ; ; ; ;
Publication Date:
Research Org.:
Lawrence Berkeley National Lab. (LBNL), Berkeley, CA (United States). National Energy Research Scientific Computing Center (NERSC); Univ. of California, Oakland, CA (United States); Massachusetts Inst. of Technology (MIT), Cambridge, MA (United States)
Sponsoring Org.:
USDOE
OSTI Identifier:
1488962
Alternate Identifier(s):
OSTI ID: 1543585
Grant/Contract Number:  
AC02-05CH11231; EC0012704; SC0011090
Resource Type:
Published Article
Journal Name:
Nuclear Physics. B
Additional Journal Information:
Journal Name: Nuclear Physics. B Journal Volume: 939 Journal Issue: C; Journal ID: ISSN 0550-3213
Publisher:
Elsevier
Country of Publication:
Netherlands
Language:
English
Subject:
74 ATOMIC AND MOLECULAR PHYSICS; Physics

Citation Formats

Zhang, Rui, Chen, Jiunn-Wei, Jin, Luchang, Lin, Huey-Wen, Schäfer, Andreas, Sun, Peng, Yang, Yi-Bo, Zhang, Jian-Hui, and Zhao, Yong. Kaon distribution amplitude from lattice QCD and the flavor SU(3) symmetry. Netherlands: N. p., 2019. Web. doi:10.1016/j.nuclphysb.2018.12.020.
Zhang, Rui, Chen, Jiunn-Wei, Jin, Luchang, Lin, Huey-Wen, Schäfer, Andreas, Sun, Peng, Yang, Yi-Bo, Zhang, Jian-Hui, & Zhao, Yong. Kaon distribution amplitude from lattice QCD and the flavor SU(3) symmetry. Netherlands. https://doi.org/10.1016/j.nuclphysb.2018.12.020
Zhang, Rui, Chen, Jiunn-Wei, Jin, Luchang, Lin, Huey-Wen, Schäfer, Andreas, Sun, Peng, Yang, Yi-Bo, Zhang, Jian-Hui, and Zhao, Yong. Fri . "Kaon distribution amplitude from lattice QCD and the flavor SU(3) symmetry". Netherlands. https://doi.org/10.1016/j.nuclphysb.2018.12.020.
@article{osti_1488962,
title = {Kaon distribution amplitude from lattice QCD and the flavor SU(3) symmetry},
author = {Zhang, Rui and Chen, Jiunn-Wei and Jin, Luchang and Lin, Huey-Wen and Schäfer, Andreas and Sun, Peng and Yang, Yi-Bo and Zhang, Jian-Hui and Zhao, Yong},
abstractNote = {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 asymptotic form. 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.},
doi = {10.1016/j.nuclphysb.2018.12.020},
journal = {Nuclear Physics. B},
number = C,
volume = 939,
place = {Netherlands},
year = {2019},
month = {2}
}

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