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• W2988897226 abstract "We use a method to calculate the hadron's charge radius without model-dependent momentum extrapolations. The method does not require the additional quark propagator inversions on the twisted boundary conditions or the computation of the momentum derivatives of quark propagators and thus is easy to implement. We apply this method to the calculation of pion charge radius $langle r_pi^2rangle$. For comparison, we also determine $langle r_pi^2rangle$ with the traditional approach of computing the slope of the form factors. The new method produces results consistent with those from the traditional method and with statistical errors 1.5-1.9 times smaller. For the four gauge ensembles at the physical pion masses, the statistical errors of $langle r_pi^2rangle$ range from 2.1% to 4.6% by using $lesssim50$ configurations. For the ensemble at $m_piapprox 340$ MeV, the statistical uncertainty is even reduced to a sub-percent level." @default.
• W2988897226 created "2019-11-22" @default.
• W2988897226 creator A5021679400 @default.
• W2988897226 creator A5061762680 @default.
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• W2988897226 date "2020-03-25" @default.
• W2988897226 modified "2023-10-14" @default.
• W2988897226 title "Lattice QCD calculation of the pion charge radius using a model-independent method" @default.
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• W2988897226 doi "https://doi.org/10.1103/physrevd.101.051502" @default.
• W2988897226 hasPublicationYear "2020" @default.
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