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- W4360978587 abstract "Using dispersion theory, the electromagnetic Sigma-to-Lambda transition form factors are expressed as the product of the pion electromagnetic form factor and the $Sigmabar{Lambda}topipi$ scattering amplitudes with the latter estimated from SU(3) chiral perturbation theory including the baryon decuplet as explicit degrees of freedom. The contribution of the $Kbar{K}$ channel is also taken into account and the $pipi$-$Kbar{K}$ coupled-channel effect is included by means of a two-channel Muskhelishvili-Omn`{e}s representation. It is found that the electric transition form factor shows a significant shift after the inclusion of the $Kbar{K}$ channel, while the magnetic transition form factor is only weakly affected. However, the $Kbar{K}$ effect on the electric form factor is obscured by the undetermined coupling $h_A$ in the three-flavor chiral Lagrangian. The error bands of the Sigma-to-Lambda transition form factors from the uncertainties of the couplings and low-energy constant in three-flavor chiral perturbation theory are estimated by a bootstrap sampling method." @default.
- W4360978587 created "2023-03-30" @default.
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- W4360978587 date "2023-03-21" @default.
- W4360978587 modified "2023-10-14" @default.
- W4360978587 title "The electromagnetic Sigma-to-Lambda transition form factors with coupled-channel effects in the space-like region" @default.
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- W4360978587 doi "https://doi.org/10.1140/epja/s10050-023-00973-1" @default.
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