Alarcón, Jose ManuelHiginbotham, D. W.Weiss, C.Ye, Zhihong2023-06-172023-06-172019-04-052469-998510.1103/PhysRevC.99.044303https://hdl.handle.net/20.500.14352/12873We extract the proton charge radius from the elastic form factor (FF) data using a novel theoretical framework combining chiral effective field theory and dispersion analysis. Complex analyticity in the momentum transfer correlates the behavior of the spacelike FF at finite Q 2 with the derivative at Q 2 = 0 . The FF calculated in the predictive theory contains the radius as a free parameter. We determine its value by comparing the predictions with a descriptive global fit of the spacelike FF data, taking into account the theoretical and experimental uncertainties. Our method allows us to use the finite- Q 2 FF data for constraining the radius (up to Q 2 ≈ 0.5 GeV 2 and larger) and avoids the difficulties arising in methods relying on the Q 2 → 0 extrapolation. We obtain a radius of 0.844(7) fm, consistent with the high-precision muonic hydrogen results.engAtribución 3.0 Españajournal articlehttps://doi.org/10.1103/PhysRevC.99.044303open accessPartículasTeoría de los quanta2208 Nucleónica2210.23 Teoría Cuántica