Fresh extraction of the proton charge radius from electron scattering

A novel method for extracting the proton radius from elastic electron-proton (ep) scattering data will be presented.  The approach is based on interpolation via continued fractions augmented by statistical sampling and avoids any assumptions on the form of function used for the representation of data and subsequent extrapolation onto Q2~0.  Applying the method to an array of modern ep data sets, all results are found to be mutually consistent and, combining them, arrive at r= 0.847(008) [fm].  This result compares favourably with values obtained from contemporary measurements of the Lamb shift in muonic hydrogen and the 2S–4P transition-frequency in electronic hydrogen.


  • I am interested in the various theoretical and phenomenological aspects of gauge field theories with or without symmetry breaking (spontaneous or dynamical). Recently, I have been studying the dynamical gluon mass generation phenomenon by reformulating the Schwinger-Dyson equations in a special framework (the so-called pinch technique background field method). I am also one of the developers of JaxoDraw.

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