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- W3135985961 abstract "We present, for the first time, an textit{ab initio} calculation of the individual up, down and strange quark helicity parton distribution functions for the proton. The calculation is performed within the twisted mass clover-improved fermion formulation of lattice QCD using one ensemble of dynamical up, down, strange and charm quarks with a pion mass of 260 MeV. The lattice matrix elements are non-perturbatively renormalized and the final results are presented in the $overline{ rm MS}$ scheme at a scale of 2 GeV. We give results on the $Delta u^+(x)$ and $Delta d^+(x)$, including disconnected quark loop contributions, as well as on the $Delta s^+(x)$. For the latter we achieve unprecedented precision compared to the phenomenological estimates." @default.
- W3135985961 created "2021-03-29" @default.
- W3135985961 creator A5057187181 @default.
- W3135985961 creator A5057350595 @default.
- W3135985961 creator A5077042942 @default.
- W3135985961 creator A5084263447 @default.
- W3135985961 creator A5089256467 @default.
- W3135985961 date "2021-03-12" @default.
- W3135985961 modified "2023-10-12" @default.
- W3135985961 title "Flavor Decomposition for the Proton Helicity Parton Distribution Functions" @default.
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