We present the current status of a non-perturbative lattice calculation of the moments of the pion and kaon distribution amplitudes by the RQCD collaboration. Our investigation is carried out using Nf=2+1 dynamical, non-perturbatively O(a)-improved Wilson fermions on the CLS ensembles with 5 different lattice spacings and pion masses down to the physical pion mass. A combined continuum and chiral extrapolation to the physical point is performed along two independent quark mass trajectories simultaneously. We employ momentum smearing in order to decrease the contamination by excited states and increase statistical precision.
@article{arxiv.1811.06050,
title = {Pion and Kaon Distribution Amplitudes from lattice QCD: towards the continuum limit},
author = {Gunnar S. Bali and Vladimir M. Braun and Meinulf Göckeler and Michael Gruber and Fabian Hutzler and Piotr Korcyl and Andreas Schäfer and Philipp Wein},
journal= {arXiv preprint arXiv:1811.06050},
year = {2018}
}
Comments
Proceedings of the 36th Annual International Symposium on Lattice Field Theory - LATTICE2018