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- W1583695607 abstract "We calculate pion vector and scalar form factors in two-flavor lattice QCD and study the chiral behavior of the vector and scalar radii <r^2>_{V,S}. For a direct comparison with chiral perturbation theory (ChPT), chiral symmetry is exactly preserved by employing the overlap quark action. We utilize the all-to-all quark propagator in order to calculate the scalar form factor including the contributions of disconnected diagrams. A detailed comparison with ChPT reveals that two-loop contributions are important to describe the chiral behavior of the radii in our region of the pion mass M_pi gtrsim 290 MeV. From chiral extrapolation based on two-loop ChPT, we obtain <r^2>_V = 0.409(23)(37) fm^2 and <r^2>_S = 0.617(79)(66) fm^2, which are consistent with phenomenological analyses." @default.
- W1583695607 created "2016-06-24" @default.
- W1583695607 creator A5045230781 @default.
- W1583695607 date "2009-11-27" @default.
- W1583695607 modified "2023-10-07" @default.
- W1583695607 title "Pion form factors from lattice QCD with exact chiral symmetry" @default.
- W1583695607 cites W2125252140 @default.
- W1583695607 doi "https://doi.org/10.48550/arxiv.0911.5193" @default.
- W1583695607 hasPublicationYear "2009" @default.
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