Pion and Kaon Distribution Amplitudes from Lattice QCD.
Phys Rev Lett
; 129(13): 132001, 2022 Sep 23.
Article
em En
| MEDLINE
| ID: mdl-36206420
ABSTRACT
We present a state-of-the-art lattice QCD calculation of the pion and kaon light-cone distribution amplitudes (DAs) using large-momentum effective theory. The calculation is done at three lattice spacings a≈{0.06,0.09,0.12} fm and physical pion and kaon masses, with the meson momenta P_{z}={1.29,1.72,2.15} GeV. The result is nonperturbatively renormalized in a recently proposed hybrid scheme with self-renormalization, and extrapolated reliably to the continuum as well as the infinite momentum limit. We find a significant deviation of the pion and kaon DAs from the asymptotic form, and a large SU(3) flavor breaking effect in the kaon DA.
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MEDLINE
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En
Ano de publicação:
2022
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Article