Matches in SemOpenAlex for { <https://semopenalex.org/work/W4306752013> ?p ?o ?g. }
- W4306752013 abstract "We present a lattice QCD determination of the distribution amplitude (DA) of the pion and the first few Mellin moments from an analysis of the quasi-DA matrix element within the leading-twist framework. We perform our study on a HISQ ensemble with $a=0.076$ fm lattice spacing with the Wilson-Clover valence quark mass tuned to the physical point. We analyze the ratios of pion quasi-DA matrix elements at short distances using the leading-twist Mellin operator product expansion (OPE) at the next-to-leading order and the conformal OPE at the leading-logarithmic order. We find a robust result for the first non-vanishing Mellin moment $langle x^2 rangle = 0.287(6)(6)$ at a factorization scale $mu=2$ GeV. We also present different Ansatze-based reconstructions of the $x$-dependent DA, from which we determine the perturbative leading-twist expectations for the pion electromagnetic and gravitational form-factors at large momentum transfers." @default.
- W4306752013 created "2022-10-19" @default.
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- W4306752013 date "2022-10-18" @default.
- W4306752013 modified "2023-10-14" @default.
- W4306752013 title "Pion distribution amplitude at the physical point using the leading-twist expansion of the quasi-distribution-amplitude matrix element" @default.
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