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Light-cone distribution amplitudes of pseudoscalar mesons from lattice QCD

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Bali, Gunnar S. ; Braun, Vladimir M. ; Bürger, Simon ; Göckeler, Meinulf ; Gruber, Michael ; Hutzler, Fabian ; Korcyl, Piotr ; Schäfer, Andreas ; Sternbeck, André ; Wein, Philipp
License: Creative Commons Attribution 4.0
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Date of publication of this fulltext: 06 Apr 2021 12:36


We present the first lattice determination of the two lowest Gegenbauer moments of the leading-twist pion and kaon light-cone distribution amplitudes with full control of all errors: aπ2=0.101+24−24 for the pion; aK1=0.0533+34−35 and aK2=0.090+19−20 for the kaon. The calculation is carried out on 35 different CLS ensembles with Nf = 2 + 1 flavors of dynamical Wilson-clover fermions. These cover a ...


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