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Volume 256 - 34th annual International Symposium on Lattice Field Theory (LATTICE2016) - Hadron Structure
Computing the nucleon Dirac radius directly at $Q^2=0$
N. Hasan,* M. Engelhardt, J. Green, S. Krieg, S. Meinel, J. Negele, A. Pochinsky, S. Syritsyn
*corresponding author
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Pre-published on: 2016 December 27
Published on: 2017 March 24
We describe a lattice approach for directly computing momentum derivatives of nucleon matrix
elements using the Rome method, which we apply to obtain the isovector magnetic moment
and Dirac radius. We present preliminary results calculated at the physical pion mass using a
2HEX-smeared Wilson-clover action. For removing the effects of excited-state contamination,
the calculations were done at three source-sink separations and the summation method was used.
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