The distribution amplitude of the ?c meson
Proceedings of Science
Volumen 453
2024-11-06
Citas: 0
© Copyright owned by the author(s) under the terms of the Creative Commons.We report on the first lattice determination of the pseudoscalar meson ?c light-cone distribution amplitude, using a set of three CLS Nf = 2 ensembles at a pion mass m? ? 270 MeV and lattice spacings a ? 0.076 fm, 0.066 fm and 0.049 fm. Employing Short Distance Factorization, we extract the pseudo-DA on the lattice for Ioffe times v ? 4.5, and the various lattice spacings allow us to take the continuum limit. We employ a basis of Jacobi polynomials to parametrize the distribution amplitude, which allows to express the matching to the pseudo distribution in closed form, and we observe a strong effect which we attribute to the heavy charm-quark mass.
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