Speaker
Dr
David Richards
(Jefferson Lab)
Description
The charge radius of the nucleon can be related to the slope of the
electromagnetic form factors at zero momentum transfer. Calculations
of the form factors using lattice QCD are typically obtained for a
discrete set of momenta $Q^2$, from which the charge radius can be
inferred. We present a method to compute the slope of electromagnetic
form factors directly, including at $Q^2 = 0$, by computing the
coordinate-space moments of current matrix elements. We begin by
describing the formalism, and then apply it to the calculation of
the isovector form factor of the nucleon.
Primary author
Dr
David Richards
(Jefferson Lab)
Co-authors
Chia Chen Chang
(LBNL)
Christopher Bouchard
(University of Glasgow)
Prof.
Kostas Orginos
(William and Mary / JLab)
